general support, and depot maintenance manual …
TRANSCRIPT
TM 11-5820-763-15
GENERAL SUPPORT, AND DEPOT MAINTENANCE MANUAL
RADIO SET GROUP OA-6997V/MRC-85[v]2
‘HEADQUARTERS, DEPARTMENT OF THE ARMYOCTOBER 1971
WARNING
DANGEROUS VOLTAGES EXISTIN THIS EQUIPMENT
Be careful when working on the 120/208-volt ac lines, and the 24- and 120-volt dc alarm-monitorconnections.
DON'T TAKE CHANCES!
TM 11-5820-763-15
TECHNICAL MANUAL HEADQUARTERSDEPARTMENT OF THE ARMY
No. 11-5320-763-15 WASHINGTON, D.C., 22 October 1971
CHAPTER 1.
CHAPTER 2.Section I.
Operator's, Organizational, Direct Support, General Supportand Depot Maintenance
RADIO SET GROUP OA-6997V/MRC-85(V)2
ParagraphGENERAL INFORMATION1-A.1 scope ___________________-_______________ :. --_--- ---_--__-----..-_---____________1-A.2 Indexes of Publications ____________________----------------------------------------1-A.3 Forms and Records ____________________--------------------------------------------1-1 Description and Purpose ----_-----_----__---__________ --_-___--_----_---__--------1-2 General ____________________------------------------------------------------------1-7 operations van Exterior -------------- ------------------ --------_-----__-___------1-24 Operations Van Interior ____________________---------------- -___-___-___ __________1-48 Items Comprising an Operable Equipment __ _ _ _ _ _ _ _ _ _ _ __ __ _ _ __ ____ ___ __ __ _ _ __ ___ _ _ _ _
INSTALLATIONINSTALLATION PLANNING2-2 Siting ____________________--------------------------------------------------------2-4 Location ____________________-----------------------------------------------------2-7 Limitations with Respect to Logistics and Operation _ _ _ _ _ _ - _ _ _ _ _ - - - _ - - - - _ - - _ _ _ _ _ _ _ _ _ _2-9 Equipment Considerations ____________________-------------------------------------2-10 Sheltering ____________________----------------------------------------------- - - -2-12 Primary AC Power ____________________-------------------------------------------2-14 Cabling --__________________------------------------------ - - - - - - - -- -_____ - - - -2-16 Grounding --_____--__-________---------- -------- ------- ----__---_---__-____------2-17 Neutral Power Line and Ground Strip _ _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ _ _ I _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _2-20 Ground Rods ____________________-------------------------------------------------2-22 Local or Remote Control Requirements _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _2-23 Local Control Requirements ____________________------------------------------------2-25 Remote Control Requirements ____________________----------------------------------2-27 Special Installation Requirements ________________________________________----------2-28 Equipment Transported in Power Amplifier Van _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _2-30 Equipment Transported in Diesel Generator Van _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _2-32 Allied Construction Requirements _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _2-33 Trenches and Ground Cover ________________________________________---------------2-36 Typical Hardstand Layout ____________________-------------------------- __________
II. LOGISTICS2-38 Receiving Data ____ :____________________-------------------------------- __________2-41 Transportation and Material Handling Equipment _ _ _ _ _ _ __ _ _ _ __ ____ _ _ _ __ _ _ __ _ _ _ _ _ _ _ _2-43 Cable Equirements _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _2-45 Unpacking and Unit Identification _____________________ _______________-__________ __2-47 Removal of Transit Cases, Waveguide Components, and Sunroof Tarpaulin ___ __ ______ __2-49 Removal of Sealing Tape and Preservative _ _ __ __ _ _ _ _ _ _ _ _ _ _ _ _ _ __ _ _ _ __ _ _ __ __ _ _ _ _ _ _ __ _ _
III. INSTALLATION PROCEDURES2-522-532-552-572-582-602-622-642-662-682-702-722-742-76
Emplacement ____________________-------------------------------------------------Positioning ____________________---------------------------------------------------
____________________-----------------------------------------------------Installation - - - - - - - - - - - - - - - - - - - _ - - - - _ - - - - _ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - _ _ _ - - - - - - -Personnel Ladder Installation ________________________________________-------------Vestibule Installation __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - _ _ _ _ _ _ _ _ _ _ _ _ _ _ - _ _ _ _ _ _ _ _ _ _ _Passageway Platform Installation _ _ _ _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ __ __ __ __ - _ _ - _ - -- _ _ -- _ _ __ _ _ _ _ _ _Air Conditioner Ducts Installation _ _______ __ ____________________--------- __________Passageway Weatherhood Installation _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Ground Rod Assembly Installation _--____________-__------------------------------Alternate Grounding Installation ________________________________________-----------Tarpaulin Sunroof Installation -----_----__--_-__----------------------------------Interconnecting Cabling Installation _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Postinstallation Tuneup and Test _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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ParagraphSection IV. PREPARATION FOR RESHIPMENT
2-79 Methods and Conditions of Reshipment -_------__-------___------------------------2-80 Methods of Reshipment -_-_----_---------______________________--------------------2-82 Conditiona of Reshipment _ _ _ _ _ _ _ _ _ _ I - _ - - - -------_-------_---_---------------------2-87 Removal and Storage of Components _--_--------___-_-_-_-------------------------2-90 Removal and Storage of Interconnecting Cabling . .___ _-___--___ _ - _ -_-_____ __ _ _ _ _ _ _ _ _2-92 Operations Van Interior _ -------_--_-------_---------------------------------------2-95 Operations Van Exterior -_----__-----_--___---------------------------------------2-97 Special Mountings ---_--_--_-_-__--__------------------- -------_---_-_--____------2-98 Skid Base --------------__--__---------------------------------- - - - - - - - - -2-100 Waveguide Mountinga ___-_______---__--__------------- ------------_--____________
CHAPTER 3. OPERATIONSection I. CONTROLS AND INDICATORS
3-2 General --__------_---__--__------------------------------------------------------3-4 Operations Van Exterior --^_-__-__---_____------------------------------ - - - - - - -3-6 Operations Van Interior ___-----_-_--_-_---_------------ -------_--------__-_______
II. OPERATING INSTRUCTIONS3-9 Primary AC Power Turn On _--_---_-__------_-_----------------------------------3-11 Primary AC Power Turn Off _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _- _ __ _ _ _ ____- __ _ __ _ __ _ _ __3-18 Emergency Primary AC Power Turn Off ________________________________________----
III. EMERGENCY OPERATION3-15 General -------__--_-_-^__-_____________________----------------------------------3-18 Baeband Amplifier No. 1 Failure ____--_____________-____________________----------3-20 Order Wire Amplifier No. 1 Failure ____________ ____________________---- __ _______-__
CHAPTER 4. PRINCIPLES OF OPERATIONSection I. FUNCTIONAL SYSTEM OPERATION
4-3 Operation __--_____________--_----------------------------------------------------Transmitting _,______,_,,,,--,,-------------------------~------------------------
4-10 Receiving _ _ _ _ _ _ _ _ _ _ _ _ --_------------------------~------ --------------------------4-16 Primary AC Power Distribution _ _ - - _ - - - - -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4-17 Unregulated Primary AC Power .-------_--_--- -_------_----------------------------4-19 Regulated Primary AC Power __ _-__ -____-_-_--_----___----------- -------___-_----4-21 Alarm and Monitoring -___--___--________-----------------------------------------4-23 Alarm-monitor ____________________------------------------------------------------4-26 Power Monitor ___________________-----------------------------------------------4-27 Fault Indicators ________________________________________--------------------------4-29 Chart Recorder _ _ _ _ _ _ _ _____-_____________-----------------------------------------
II. FUNCTIONAL OPERATION OF ELECTRONIC CIRCUITS4-32 Detailed Functioning _ ____________________-----------------------------------------4-33 Voice Frequency Channel Operation ___________________-----------------------------4-38 Voice Frequency Telegraph Operation _ ______-_____-_------------- ----------__------4-42 Voice Frequency Order Wire Channel Operation _ ____________ _______ ---- --- __- -_ _----4-47 Alarm and Monitoring ____---______----___-------------- --_----_-------------------4-48 Alarm-monitor __----____________,___,,_____,___,_,____----------------.-----------4-59 Power Monitor _ _ _ _ _ _ _ __----____-_________----------------------------------------4-61 Recorder Control --__--____-________-____________________-------------------------4-67 Patch Panel Operation ___-______________-_---------------------------------------4-68 Baseband and Order Wire Patch Panel _ _ _ _______-_-------------------- ---- ---_____--4-75 Exciter Patch Panel __-_________________------------------------------------------
III. FUNCTIONAL OPERATION OF MECHANICAL ASSEMBLIES4-78 Air Brake System ____-_-___________----------------------------------------------4-80 Brake Application _ - - - ____________________--------------------------------------4-82 Brake Release _______ ____________________-----------------------------------------4-84 Air Hose Couplings _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - _ _____-____-------_-------------------------4-86 Air Cleaners ________________________________________-----------------------------4-88 Air Reservoir ____________________------------------------------------------------4-90 Emergency Relay Valve __________________-_---------------------------------------4-97 Brake Air Chamber ____________________-------------------------------------------4-101 Master Cylinder ________________________________________------ ---------- _-__--- ---4-107 Wheel Brake Mechanism ____________________--------------------------------------
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4-34-34-34-44-54-54-64-64-74-74-8
4-114-114-114-114-114-124-124-154-154-15
CHAPTER 5.Section I.
TM 11-5820-763-15
ParagraphMAINTENANCE5-1.15-1.35-1.55-1.75-1.95-1.115-1.135-1.145-1.155-1.165-1.175-1.185-1.195-1.205-1.215-1.225-1.235-1.245-1.255-1.275-1.295-1.315-1.325-1.335-1.345-1.355-1.375-1.385-1.395-1.405-1.415-1.425-1.435-1.445-1.455-l.475-1.485-1.495-1.505-l.515-1.525-1.535-1.545-1.555-l.565-1.575-1.585-1.595-1.61
General ____________________------------------------- ------------------- __________Power Monitor Meter Checks _ ____________________------------ ----------- __________Operations Van Power Turn-On and Turn-Off Procedure ------------------ _________-Winding and Setting Clock ____________________------------------------------------Roadside Radius Rod Adjustment - - - -_- - - -_- - - - - - - - - ----_-- - -------- _________ -Operations Van Leveling ______------------------------,-------------~-------------Inspection and Cleaning of Operationa Van Interior _____--__--___ ---------- __________General Information ____________________------------------------------------------Materials Required ____________________--------~----------------------------------Procedure ____________________----------------------------------- ----- ------------Operations Van Exterior Inspection and Cleaning ____ ____ _____-- --_- -_--- ____ ______General Information ____________________------------------------------------------Materials Required ____________________-------------------------------------------Procedure ____________________----------------------------------------------------Pioneer Kit Inspection and Cleaning ______________-_____------ ----------- __________General Information _________-___--___----------------- _----------------______ ----Materials Required ..............-------------------------.---------------------------------------Procedure ____________________------------------------------------ -- ____ __________First Aid Kit Inspection _-_--_---__-_-----_---- ----__-- - . . - - - - --------__________Lantern and Flashlight Inspection _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - _ - _ _ _ - - - - - - - - - - _ _ _ _ _ _ _ _ _ _Fire Extinguisher Inspection ____________________-----------------------------------Tarpaulin Inspection and Cleaning --__-__--___--_---_---- - - - - - -------__--__--_-General Information ____________________------------------------------------------Materials Required ____________________--------------------------------------------Procedure _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - - _ _ - _ _ - _ _ _ _ _ _ _ _ _ _ _ _Tire Inspection ____________________----------------------------------------~-------Lubrication ____________________---------------------------------------------------General Information ____________________-------------------------------------------Materials Required ____________________--------------------------------------------Procedure ____________________----------------------------------------------------Replenishing Hydraulic Brake Fluid _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - - - - - - - - - _ _ _ _ _ _ _ _ _ _General Information _ _ _ _--______________-_------- _-____-_--__--__-----------------Materials Required ____________________--------------------------------------------Procedure ____________________----------------------------------------------------Air Brake System Moisture Drainage _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - - - - _ _ _ _ - _ _ _ _ _ _ _ _ _ _Air Cleaners Inspection and Cleaning _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _General Information ---------------------------------------------------------------Materials Required ____________________--------------------------------------------Procedure ____________________----------------------------------------------------Air Brake System Inspection ____________________----------------------------------General Information _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ --_____-_--__--___----------------Materials Required _ _ _ _ - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ---_______________-_-----------------------Procedure ____________________----------------------------------------------------Bleeding Brakes _ _ _ _ _ _ _ _ _ _ I _--_-____-__--____---------------------------------.---General Information _ _ _ ---_________________---------------------------------------Materials Required _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ---_-_______________-------- -------__________Procedure __-_---_____________----------------------------------------------------Stop and Running Lights Inspection _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Emergency Lighting Inspection _ _ _ _ _ _ ---_________________---------- --- __________
Section II. ORGANIZATIONAL/DEPOT MAINTENANCE5-3 Test Equipment - - - - - -_ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ____________________-------------------5-5 Performance Test Standards ____________________-----------------------------------5-7 Test Points ___--______________------------- ____________-___---------------------5-9 DC Voltage Requirements and Sources _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - - - _ _ _ _ _ _ _ _ _ _5-11 Preventive Maintenance _ _ _ _ _ _ _ _ _ --__-__---_______-------------- ----------___------5-13 Troubleshooting ________________________________________--------------------------5-16 Alignment or Adjustment _ _ _ - _ . . _ _ _ -____-__-__-___--_---------------*---------------5-19 Operations Van Electrical and Electronic Maintenance _ _ _ _ _ _ _ _ _ _ _ - - - - - - - - - - _ _ _ _ _ _ _ _ _ _5-21 Operatione Van Mechanical Maintenance _--_-___________-_-------------------------5-23 Removal and I&placement of Tires and Wheels _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - _ _ _ _ _ _ _ _ _ _ _5-29 Removal and Replacement of Hub and Wheel Brake Mechanism _ _ _ _ _ _ _ _ _ _ - - - - _ _ _ _ _ _ _ _ _ _5-38 Brake Hydraulic System __ __ ---------_-___-_--__-----------------------------------5-42 Brake Air System ________________________________________------------------------
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5-145-145-145-145-165-165-165-165-165-175-225-255-25
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ParagraphSection II.--Cont.
5-51 Suspension Assembly ----------------------------------------------------------------5-57 Removal and Replacement of Axle Assembly __-_-- ----__---_-- ___-____________________5-61 Landing Gear Assembly ---_----------_-------------------------------------------
III. SPECIAL MAINTENANCE5-67 Operations Van Mechanical Maintenance -----_----------__--___________________----
CHAPTER 6. CIRCUIT DIAGRAM6 - 1 P u r p o s e6-8 Scope
----_----_-----_-__-____________________-----------------------------------_-__-----__---____-____________________------------------------------------
6-5 Arrangement _ _ _ _ _ _ _ _ _ _ _ _ _ _ c _ _ r _ - ---_-_-___-_--__---_-----------------------------6-7 Circuit Diagram Reference Data ___________--_-c------------------------------------
APPENDIX A. REFERENCES ----_-__---_---___--____________________------------------------ - - - -
B. MAINTENANCE ALLOCATION _ _ _ _ _ _ _ _ _ _ _ - _ - - - _ _ - - - - - _ - - - - - - - _ - - - - -_ _ - - _ - - _ _ _ _ _ _ _ _ _ _ _
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CROSS-REFERENCE INDEX -__---_-----_-------____________________----------------------- --- CRI-1
ALPHABETICAL INDEX _____-___-_____---______________ --------------------- ____-___-- -- -- _____ AI-1
Figurel - 1l - 2l - 3l - 41-52-12-22-32-42-52-62-72-82-92-102-112-122-132-143-13-23-33-43-53-63-73 - 83 - 93 - 1 03 - 1 13 - 1 23 - 1 34 - 14 - 2
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List of Illustrations
Radio Set Group OA-6997V/MRC-85(V)2 (Operations Van) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ _Operations Van Relationship to Radio Set AN/MRC-85 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Operations Van Interior ..............______-_________________________________-----------Operations Van Exterior Curbside View _ _ _ - - - - - - - - _ - - - - - - _ _ _ _ - - - - - - - - - - - - - -Operations Van Exterior Roadside View _ _ _ - - - - - - - - - _ - - - - - - _ _ _ _ - - - - - - - - - - - - - -Typical Site Layout ...........................................-------------------------------------------------------Typical Hardstand Layout - - - - - - - - _ - - - - - - _ - - _ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Operationa Van Floor Plan _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Operations Van Waveguide Storage ............................__--_-------------------------------------Landing Gear Assembly Adjustment _ _ _ _ _ _ - _ _ _ _ _ _ _ _ - _ __ __ _ _ _ - - - - - - - _ - - - - - - -Leveling Jack Assembly Adjustment _ _ _ _ _ _ _ __ _ _ __ __ ______ .- _ _ _ _ __ _ _ _ _ _ _ __ __ __Personnel Ladder Installation _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Vestibule Installation _ _ _ - - - - - - - - - - - - - - _ _ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Passageway and Air Conditioner Ducts Installation _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Power Entrance Box _ __ _ __ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ ___ __ _ __ __ ____ _ _ _ ___ _ _ _ _ _ _ __ _ _ __Alternate Grounding Installation _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Tarpaulin Sunroof Installation _ _ _ _ - - - - - - - - - - - - - - - - - - -_________________ - -Audio and Alarm Box ________________________________________-------------Signal Line Extension Box - - - - - _ _ - _ - - - - - - _ - _ - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Under Van Controls ........................................~~-------------------------------------------------------Bench Level ....................................__-_________________-----------------------------------------Stop Indicators .............................____________________--------------------------------------Landing Gear Assembly ...........................____________________-------------------------------Leveling Jack Assembly .................................____________________-------------------------------Spare Tire Carrier ............................................--------------------------------------------------------Distribution Box ..................................____________________---------------------~----------------Main Circuit Breaker and Van Light Switches _ _ _ _ _ _ _ _ - - _ - - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Power Monitor ................................____________________---------------------------------------Alarm-Monitor -_ ...............___________----_- ----- - - - - - - - - - - - - - - - - - _ _ _ - - - - - - - - - - - - - - -Recorder Control __________________.........................................------------------------~--------Patching Faulty Baseband Amplifier _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - _ - - - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - -Patching Faulty Order Wire Amplifier _ _ _ _ _ _ _ _ _ _ _ _ _ _ - - _ _ - - _ _ _ _ _ _ _ _ _ _ _ _ _ _ - - - -Voice Frequency Channel, Simplified Schematic Diagram - - -_ _ _ _ _ _ _ _._ - _ _ _- -- - -Voice Frequency Telegraph Channel, Simplified Schematic Dia-
gram ................................................----------------_-------------------------------------------------
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Figure4 - 3
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List of Illustrations (cont)
Voice Frequency Order Wire Channel, Simplified Schematic~~~~_~~~~~~~~~~~~-_------------~---~-----~~ - - - - - - - - - - - - - - - -
Baseband Patching, Receiving __________________ _ _________-._- ---------------Order Wire Patching, Receiving _ _______________________ - - - - - - - - - - - - - -
Baseband Patching, Transmitting ____________________-------- --_------------Order Wire Patching, Transmitting --------------------___________ ----------Exciter Patch Panel___________~___~___~~~~~~~~~~~~~~~~~~~~- ---------------Operations Van Brake System _________________ - ---------- -----_------------Emergency Relay valve ______--___-_-____----- - - - - - - - - - - - - - - - - - - - - - - - - - - - -Brake Air Chamber and Master Cylinder _________-__________---------- ------Wheel Brake Mechanism ____________________---------------- --_------------
Roadside Radius Rod Measurements ________________________________________Roadside Radius Rod ____________________------------------- --_------------Operations Van Forward Lubrication Points _ _ _ _ _ _ _ _ _ _ _ _ _ _ - _ - - - _ - - - - - - - - - - - -Personnel Ladder Lubrication Points ____________________--------------- -----Leveling Jack screw ______________--____----------------------------- -----Master Cyl inder ____________________--- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Air Brake System Moisture Drainage Points ____________________----------- ---Air Cleaners Inspection ____________________--------------------------------Bleeding Brakes _________________________ - - - - - - - - - - - - - - _ - - - - - - - - - - - - - - - -
Baseband and Order Wire Patch Panel ____ __ __ __ ____ ____ _ __ _ __ ______ __ __ __ __
Primary AC Power, Schematic Diagram (Sheet 1 of 2) _ _ _ _ _ _ _ _ __ _ _ _ _ __ __ _ _ _ _ - _Primary AC Power, Schematic Diagram (Sheet 2 of 2) _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Regulated Primary AC Power, Schematic Diagram _ _ _ _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _Alarm-Monitor, Schematic Diagram _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Recorder Control, Schematic Diagram ____________________ - _________________Speaker Panel, Schematic Diagram ____ _ _ __ __________ __ __ _ __ __ ____ __ __ _ _ ____Baseband and Order Wire Patch Panel Cabling Diagram
Sheet 1 of 2) ____________ - - - - - - - - - - _ - - _ _ _ - _ _ _ - - - - - - - - - - - _ - - - - - - - -Baseband and Order Wire Patch Panel Cabling Diagram
(Sheet 2 of 2) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Interequipment Cabling Data (Sheets 1 through 21) __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ _ _ _ _ __ _ _24 V DC Cabling Diagram _ _ _ - - _ - - - - _ _ _ _ - - _ _ _ _ _ _ _ - - - - - - - - - - - - - - - - - - - - - - - - -Operations Van Functional Block Diagram (Sheet 1 of 2) _ _ _ _ _ - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Operations Van Functional Block Diagram (Sheet 2 of 2) _____________ - ________Radio Set Group OA-6997V/MRC-85(V)2 (Sheet 1 of 3) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Radio Set Group OA-6997V/MRC-85(V)2 (Sheet 2 of 3) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __Radio Set Group OA-6997V/MRC-85(V)2 (Sheet 3 of 3) _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Signal Line Extension Panel --_--______________________ - - - - - - - - - - - - - - - - - _ -Transmitter Group __-_-__-________________________________---------------Voice Frequency Terminal Assembly __ _ _ _ _ _ _ _ _ _ _ _ _ __ _ _ _ _ __ _ _ _ _ _ _ _ _ __ _ _ _ _ __ _ _Test Equipment and Cabinet Assembly (Sheet 1 of 2) __ ____ __ __ ______________ __Test Equipment and Cabinet Assembly (Sheet 2 of 2) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Accessory and Bulletin Board Assembly _ _ _ _ _ _ - - - - - -_____-____--__-- - - - - - - - - - -Alarm-monitor BZ-106/MRC-85(V)2 _ _ _ _ - - - -__-- -_____-_____-- - - - - - - - - - - - - -Alarm-monitor Assembly --__-_______________-- - - - - - - - - - - - - - - - - - - - - - - - - - - - -Audio and Alarm Box Assembly ____ __ __ __ _ _ __ __ __ __ ____ ____ ____ __ __ __ __ __ __Order Wire and Telephone Set Assembly _____ _ ----___-__~________-----------Drinking Water Dispenser Assembly _ _ _ _ - - - - -_- - -___________-- - - - - - - - - - - - -Teat Equipment Dolly Assembly - - - - - - _ _ - _ - - _ _ _ _ _ _ _ _ - - - - - - - - - - - - - - - - - - - - - -Semitrailer, Van V-205/MRC-85(V) _ _ _ _ _ _ - - - - - _ _ - - - _ - - - _ _ _ _ - _ - - - - - - - - - - - -115 Volt Electrical Installation - - - - - - - - - _ _ _ - _ _ _ _ _ _ _ - - - - - - - - - - - - - - - - - - - - - - - - -
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Figure6-24(1)6-24(2)6-25(1)6-25(2)
Table1-11-21-31-4
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3-13-23-3
5-0.15-15-25-35-45-55-6
List of Illustrations (cont)
Page24 Volt Electrical lnstallation (Sheet 1 of 2) _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 6-4224 Volt Electrical Installation (Sheet 2 of 2) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 6-43Securing and Storage Facilities (Sheet 1 of 2) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Fold-inSecuring and Storage Facilities (Sheet 2 of 2) _ _ _ _ _ _ __ _ _ _ _ - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ 6-44
List of Tables
Leading Particulars - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - _ _ - - - - - - - - _ _ _ _ _ - - _ _Capabilities and Limitations _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Equipment Supplied _ _ _ _ - _ _ _ - _ _ _ - _ _ _ - _ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Equipment Required but Not Supplied _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Cable Requirements _ _ _ _ _ _ _ _ _ _ _ - - - - - - - - - - - - - - _ - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Operations Van Exterior, Controls and Indicators _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _AC Power, Controls and Indicators _ _ _ _ _ _ _ _ - - - - - - - - _ - _ _ - - - - _ _ _ _ - - - - - - - - - - - - - -Alarm-monitor, Controls and Indicators (fig. 2-10) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _24-Volt Emergency Lighting, Controls and Indicators --------_---______________Recorder Control, Controls and Indicators (fig. 3-11) - - - - - - - - - _ _ - - _ - - _ - _ _ - - - -
Preventive Maintenance Routines _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Test Equipment _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Test Points and Patch Jacks _________________ - ____________________ - _________DC Voltage Requirements and Sources ________ - ____________ - ________ - ________Primary AC Power, Troubleshooting Chart - - - - - - - _ - - - - - - - - _ - - _ - - - - - - - - - - - -Mechanical and 24-Volt DC, Troubleshooting Chart _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Mechanical Tolerances ................................___________________--------------------------------
Page1-81-8
1-101-16
2 - 6
3-13-23-53-73-7
5-15-145-145-165-185-205-30
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Figure 1-1. Radio Set Group OA-6997/ MRC-85(V)2 (Operations Van).
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CHAPTER 1
GENERAL INFORMATION
1-A.1. Scope
a. This manual describes Radio Set Group OA-6997V/MRC-85(V)2. It includes installation andoperation instructions and covers operator, orga-nizational, direct support (DS), general support(GS), and depot maintenance.
b. A maintenance allocation chart appears inappendix B.
NOTEAppendix B is current as of 26 August1971.
1-A.2. Indexes of Publications
a. DA Pam 310-4. Refer to DA Pam 310-4 todetermine whether there are new editions,changes, or additional publications pertaining tothe equipment.
b. DA Pam 310-7. Refer to DA Pam 310-7 todetermine whether there are modification workorders (MWO’s) pertaining to the equipment.
1-A.3. Forms and Records
a. Reports of Maintenance and UnsatisfactoryEquipment. Use equipment forms and records inaccordance with instructions in TM 38-750.
b. Report of Packaging and Handling Deficien-cies. Fill out and forward DD Form 6 (Report ofPackaging and Handling Deficiencies) as pre-scribed in AR 700-58 (Army)/NAVSUP Pub 378(Navy)/AFR 71-4 (Air Force)/and MCOP4030.29 (Marine Corps).
c. Discrepancy in Shipment Report (DISREP)(SF 361). Fill out forward Discrepancy in Ship-ment Report (DISREP) (SF 361) as prescribedin AR 55-38 (Army)/NAVSUP Pub 459 (Navy) /AFM 75-34 (Air Force) /and MCO P4610.19(Marine Corps).
d. Reporting of Equipment Manual Improve-ments. The reporting of errors, omissions, and re-commendations for improving this publication bythe individual user is encouraged. Reports should
be submitted on DA Form 2028 (RecommendedChanges to Publications) and forwarded directto Commanding General, US Army ElectronicsCommand, ATTN : AMSEL-MA-NMP-M FortMonmouth NJ 07703.
1-1. Description and Purpose
1-2. General
1 - 3Radio Set Group OA-6997V/MRC-85(V)2, here-inafter referred to as the operations van (fig. 1-1), is an integral part of a mobile forward propa-gation tropospheric scatter (FPTS) facility, de-signated Radio Set AN/MRC-85. When used inconjunction with other components of Radio SetAN/MRC-85 (fig. l-2), the operations van pro-vides simultaneous transmission and reception offm signals within the frequency spectrum of 755to 985 mc.
1 - 4The operations van, consisting of a modified M-373A2 semitrailer van and various electronicequipments (fig. l-3), is designed so that it maybe transported over all types of roads and terrain.Located on the exterior of the operations van (figs.l-4 and l-5) are the landing gear, leveling jacks,bench levels, and cable entrance boxes. Storagespace is provided under the van for transportingladders, platforms, leveling jack shoes, tarpaulinbows, and a spare tire. Storage space is also pro-vided within the operations van for transportingwaveguide and transit cases.
1 - 5Electronic equipment in the operations van con-verts voice frequency and dc teletype signals sup-plied from subscriber truck lines, to. frequencymodulated rf signals which are used to drive as-sociated electronic equipment in the power am-plifier van. Additional equipment in the opera-tions van converts frequency modulated rf signals,from associated electronic equipment in the poweramplifier van, to voice frequency and dc teletype
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signals which are routed to subscriber trunk linesfor operating telephone and teletype equipment.
1 - 6Monitoring facilities within the operations vanprovide indications of malfunctioning equipmentin the diesel generator, power amplifier, and op-erations vans.
1-7. Operations Van Exterior
1 - 8When in tow, the operations van is supported atthe front by a fifth wheel and king pin assembly.A pintle hook, located at the rear of the opera-tions van, is provided for towing a trailer whenrequired. Tie-down sockets at the sides and endsof the van are used to secure the operations vanduring shipment. Air intake and exhaust portsare provided for use by two operations van airconditioner units. Air conditioner air return andsupply ports are used when the air conditioningsystem is connected to the power amplifier van.The underside of the operations van has provi-sions for stowing items during movement fromone location to another. Also stowed there is atool box containing tire tools, leveling jack bars,
and camloc wrenches. Chock blocks, to preventthe operations van from rolling when the landinggear and leveling jack assemblies are not in posi-tion, are stored in carriers under the van.
1 - 9A description and purpose of components locatedon the operations van exterior is given in the fol-lowing paragraphs (See figs. 1-4 and 14.)
1-10. Air Conditioner Air Return and SupplyPorts
The air conditioner air return and supply portprovide an interconnecting point between the op-erations van air conditioning system and thepower amplifier van. Air conditioning ductswhen installed between these ports and the poweramplifier van air conditioner ports, extend airconditioning facilities to the power amplifier van
1-11. Audio and Alarm BoxThe audio and alarm box is a covered junctionbox containing four binding posts and two elec-trical connectors which provide terminations fora signal cable from the diesel generator van andexternal telephone connections.
Figure 1-2. Operations Van Relationshipto Radio Set AN/MRC-85.
1 - 2
Figure 1-3. Operations Van Interior.
1 - 3
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
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1-4
Figure 1-4. Operations Van Exterior Curbside View.
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1-5Figure 1-5. Operations Van Exterior Roadside View.
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1-12. Air intake and Exhaust PartsTwo air intake and two air exhaust ports arelocated on each side of the operations van foruse by the two air conditioner units within thevan. Air supplied through the intake ports is usedto cool the air conditioner condenser coils or toprovide ventilation for the van. The exhaust portsare used to remove warm air from the air condi-tioner units.
1-13. Brake Air Hose CouplingsBrake air hose couplings provide connection be-keen the prime mover air brake system and theoperations van air brake system. Couplings onthe rear of the van supply air to the brake systemof vehicles towed in tandem. When not in use,the brake air hose couplings are connected todummy couplings to prevent foreign matter fromentering the air brake system.
l-14. Curbside DoorsTwo hinged doors separated by a removeable cen-ter post provide a large access opening (approxi-mately 60 inches by 80 inches) into the opera-tions van.
l-15. landing Gear AssemblyThe landing gear assemblies are adjustable sup-port equipment which support the front end ofthe operations van when it is not not connected to atowing vehicle. They are also used to raise orlower the front of van during leveling operations.
l-16. Leveling Jack AssemblyThe leveling jack assemblies, in conjunction withthe landing gear assemblies, provide a means forleveling the operations van. They are also used toprovide support for the rear of the operations vanwhen it is not connected to a towing vehicle.
l-17. Lifting EyesEight retractable lifting eyes are provided forlifting or tying down the operations van duringshipment.
l-18. Lights and ReflectorsRunning lights, stop lights, a blackout light, andreflectors are provided in compliance with safetyregulations.
l-19. Power Entrance Box -The power entrance box is a panel-covered boxcontaining two ground studs and an electricalconnector which provide a termination point for
the power cable from the diesel generator van anda means of grounding the operations van.
1-20. Rear DoorA rear door provides an access opening (approxi-mately 20 inches by 70 inches) into the opera-tions van.
1-21. Receive Antenna Feed ThruThe receive antenna feed thru is an insulated con-ductor mounted in the curbside wall of the op-erations van, providing a means of connecting theSP600 receiver to an external antenna.
l-22. Signal Line Extension BoxThe signal line extension box is a panel-coveredjunction box containing twelve electrical connec-tors terminating signal and regulated ac powercables from the power amplifier van.
l-23. 24-Volt DC Electrical Input ConnectorThe 24-volt dc electric81 input connector inter-connects 24 volts dc from the prime mover to theoperations vans.
1-24. Operations Van Interior
l -25 .The following paragraphs provide a descriptionand purpose of each equipment located inside theoperations van (see fig. 1-3).
l-26. Air ConditionerAn air conditioner consisting of two independentunits is provided to supply heating and coolingfacilities for maintaining a constant temperatureof approximately 75° F within the operationsvan. Both units are operated from a single controlbox located on the front of one of the units. Thecooling facility can be extended to the power am-plifier van by the use of interconnecting ducts.
l-27. Alarm-MonitorThe alarm-monitor box contains circuits formonitoring the status of power units in the diese1 generator van. Lamps and buzzers providevisual and audible indications of malfunctioningequipment. Two front panel-mounted toggleswitches control operation of the diesel generatoralarm circuits.
l-28. Baseband and Order Wire Patch PanelThe baseband and order wire patch panel hastelephone jacks on its front panel and receptaclesfor cable terminations on its rear panel. The base-
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1-29. chart RecorderThe chart recorder is comprised of identical dualink recorders. The chart recorder is rack mountedtest equipment used for monitoring receiver per-f o r m a n c e .
1-30. Distribution BoxThe distribution box contains 20 circuit breakersas follows: two l00-ampere, S-phase, 60-cycle,thermal overload protected and manually operat-ed circuit breakers; four 120-volt ac, 20-ampere,single-phase, 6O-cycle, thermal overload protect-ed and manually operated circuit breakers; four-teen 120-volt ac, 15-ampere, single-phase, 60-cycle,thermal overload protected and manually operat-ed’ circuit breakers. The circuit breakers controlthe distribution of power to individual equipments and circuitry in the operations van.
1-31. ExcitersTwo fin exciters provide driving power for poweramplifiers in the power aplifier van. Input to theexciters is supplied by the multiplex set and thevoice order wire equipment.
l-32. Exciter Patch PanelThe exciter patch panel has 6 connectors for ca-ble terminations. It provides means for patchingthe exciter output through to the power ampli-fier van or for patching the exciter output backinto the exciter dummy load.
1-33. Fault Locating IndicatorsTwo fault locating indicators provide visual andaudible indications of malfunctions and devia-tions from norm81 operation of equipment in theoperations van and the power amplifier van.
l-34. Main Circuit BreakerThe main circuit breaker is a manually operatedcircuit breaker with a 208-volt ac, 200-ampere,3-phase, 60-cycle service rating. It is designed toprovide thermal overload protection which auto-matically removes power from the operations vanwhen the 200-ampere rating is exceeded.
1-35. Main Distributing FrameThe main distributing frame (MDF) is a 5-footopen rack containing 15 terminal blocks arrangedin 5 rows of 3 columns and is designed to dis-
tribute signals to and from the subscriber trunklines. The terminal blocks on the mdf are the in-traconnecting points between electronic equip-ments in the operations van and the subscribertrunk lines.
1-36. Multiplexer SetMultiplex Set AN/MCC-13 is a fully transistoriz-ed frequency division multiplex equipment de-signed to provide for the transmission and recep-tion of 72 4-kc voice frequency channels.
l-37. Order Wire Telephone SetThe order wire telephone set is a three-panel unitwhich provides a voice order wire circuit for theFPTS facility. The order wire telephone set isfor the use of operations and maintenance person-nel for intrasystem communications.
1-38. Performance MonitorThe performance monitor (Radio Test Set AN/MRM-8) contains test equipment (mounted intwo racks) used for making performance tests oradjustments on equipment in the operations van.Racks No. 1 and No. 2 are used together formaking maintenance checks and adjustmentswhen the operations van equipment is out of serv-ice.
1-39. Power MonitorThe power monitor is a panel containing a volt-meter, frequency meter, and a switch. It is usedto monitor all three phases of primary ac inputpower.
1-40. Receiver SP-600The SP-600 receiver is a rack-mounted generalcoverage (0.65 to 54 mc) receiver used for test-ing and adjusting equipment.
l-41. ReceiversFour identical fm receivers are provided to de-modulate the 70-mc rf signals from parametricamplifiers in the power amplifier van and amplifythe resluting baseband and order wire signals.Combiners within the receivers provide an out-put signal with a high signal-to-noise ratio andapply the signal to other equipment in the opera-tions van for further processing.
l-42. Recorder ControlThe recorder control is a panel containing twoidentical electrical circuits which select the time
constant and input to each channel of the chartrecorder.
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1-43. Speaker PanelThe speaker panel is a rack-mounted panel con-taining a 5-inch speaker and impedance match-ing transformer for use with the SP-600 re-ceiver.
1-44. Telegraph Distortion MeasurementSystem
The telegraph distortion measurement system(TDMS) is rack-mounted test equipment consist-ing of a power supply, transmitter, and receiver.This equipment is used for testing and adjustingthe voice frequency telegraph (VFTG) equip-ment.
1-45. Voice Frequency Telegraph EquipmentThe voice frequency telegraph (VFTG) equipment is a frequency division multiplex systemwhich provides for the transmission and recep-tion of 48 teletype channels.
l-46. Test EquipmentMiscellaneous test equipment required for main-tenance of the operations van is stored in testequipment storage cabinets.
1-47. Support ItemsNumerous support items such as a broom, chairs,a flat top desk, etc., are supplied with the opera-tions van. These items, used by operating andmaintenance personnel, are not a direct functionalpart of the operations van.
1-48. Items Comprising an OperableEquipment
Table 1-3 (Items Supplied) lists the items com-prising an operable equipment. A listing of equip-ment required but not supplied is given in tablel-4.
Table l-l. Leading ParticularsPrimary power requirement9 AC : 120/208-volt, 60-cycle, 3-phase, 4-wire, 18-kilowatt (nominal)
AC regulated: 120-volt, 60-cycle, single-phaseDC : 24-volt
AC lighting _-_____________________________ Two overhead rows of six 75-watt, 115-vac lamps eachBody type _________________________________ Modified M373A2 Army Ordnance semitrailer vanCabling requirements _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Signal and power cabling requirements are covered in Chapter 2, table
2-l and in cabling diagrams of Chapter 6DC emergency lighting _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Three overhead 24-volt lampsDimensions (approx) ---------------------- 35 feet long, 8 feet wide, 11 feet highStorage conditions _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Operations van must be sealed with pressure sensitive tape and coated
with preservative oilTransportability _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Via airlift in C-124, C-130, or C-133 aircraft
Via rail flatcarVia sea transportGround ; M-48, M-62, M221 truck tractor or XM198Al trailer converter
dollyWeight (approx) - - - - - - - - - - - - - . - - _ _ _ _ _ _ _ _ _ _ 27,000 lbs fully loaded
Table 1-2. Capabilities and Limitations
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Table 1-2. Capabilities and Limitations- Continued
1 - 9
1 - 1 0
TM 11-5820-763-15 Table 1-3.. Equipment Supplied
Federal Stock No.or Mfr. Part No.
Wickes 8750571-501
Miller 3169880
Ellis and watts MIL-AC-68
Wickes 8750623
Wickes 8750622-501
Graybar GB627A
Radio EngineeringLaboratories, Inc.Type 952
Wickes 8750666
Radio EngineeringLaboratories, Inc.Type 958
Square D Co.ML3426S
Wickes 8760027-501
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5 T a b l e 1 - 3 . E q u i p m e n t S u p p l i e d ( c o n t )
F e d e r a l S t o c k N o .o r M f r . P a r t N o .
L e n k u r t 7 9 0 - 0 7 9 2 9 - 0 1
G r a y b a r G B 3 2 0
R a d i o E n g i n e e r i n g L a b o r a t o r i e s , I n c . Type 1005B
Square D QOC3OS
W i c k e s 8 7 6 0 0 2 1 - 5 0 1
W i c k e s 8 7 5 0 5 7 5 - 5 0 1
R a d i o E n g i n e e r i n g L a b o r a t o r i e s , I n c . Type 959
W i c k e s 7 7 5 0 5 4 0 - 5 0 2
W i c k e s 7 7 5 0 5 3 4 - 5 0 1
W i c k e s 8 7 5 0 6 4 3 - 5 0 1
N o r t h e r n R a d i o C o . T y p e 2 8 3 M o d e l 1
R a d i a t i o n T D M S
W i c k e s 5 7 0 1 1 7 4 - l Wickes 5701016 W i c k e s 7 7 5 0 5 7 5 - 5 0 1 W i c k e s 8 7 5 0 5 7 6 - 5 0 2 Wickes 574005
Wickes 7760000
1 - 1 1
T a b l e 1 - 3 . E q u i p m e n t S u p p l i e d ( c o n t ) T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
1 - 1 2
Table 1-3. Equipment Supplied (cont.)T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
1-13
Table 1-3. Equipment Supplied (cont.)TM 11-5820-763-15
1 - 1 4
Table 1-3. Equipment Supplied (cont) T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
1-15
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
Table 1-4. Equipment Required but Not Supplied
Prime mover for towing operations van. Any of the followingtypes of prime mover may be used: M-48, M-52, M-221truck-tractor; or XM198A1 dolly, t rai ler converter ,8 ton,2 w h e e l
Passage way platform section (Miller 2948930)Vest ibule frame (Wickes 7700614)Vest ible covering (Wickes 7760014)Passageway frames (Wickes 7700614)Passageway covering (Wickes 8750661)Air duct hose (Wickes 8750626)Air conditioning transition frame (Wickes 7750546)Sandpaper , No. 0000B r u s h , s o f t - b r i s t l e dBrush, paint , Federal Specification TT-C-598Caulking compound, MIL-F-3268BC l o t h , l i n t - f r e eCleaning solvent, Federal Specification P-S-661Tape, pressure sensit ive, Type III , Class I , Federal Specifica-
t i o n P P P - T - 6 0Grease, automotive and art i l lery, MIL-G-10924BLubricating oil, general purpose, Federal Specification VV-L-
8 2 0 BFluid, hydraulic brake, Federal Specification VV-F-451APaint , semi-gloss, s trata blue color no. 15045 per Federal
S t anda rd 595Paint , semi-gloss, red, color no. 21105 per Federal Standard
5 9 5Paint , semi-gloss, l ight green, color no. 24533 per Federal
Standard 595Paint , semi-gloss, l ight gray, color no. 26293 per Federal
Standard 595Paint , lusterless, yellow, color no. 13085 per Federal
S t anda rd 5955110-288-6520-CX5120-696-87505110-223-4971-CX5110-277-4588
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C H A P T E R 2
INSTALLATION
2 - 1 . I n t r o d u c t i o n
This chapter furnishes the information needed to equipment , and cable requirements . Instal lat ion
install the operations van. Section I discusses in-procedures are given in sect ion III . sect ion IVprovides information needed in preparing the op-
s t a l l a t i o n p l a n n i n g d a t a ; S e c t i o n I I c o v e r s l o - e r a t i o n s v a n f o r r e s h i p m e n t .
Sec t ion I . INSTALLATION PLANNING
2 - 2 . S i t i n g
2 - 3 .
The problem of siting, as it will affect the opera-tions van, must be considered in relation to as-sociated equipment. The consideration cannot begeneral ized to the operat ions van alone as i t i sonly one part of the communications facility. Thefol lowing paragraphs provide general informa-tion on the selection of a suitable location for theoperat ions van within a typical s i te layout . Formore detailed information, refer to the applicabledetailed site plan.
2 - 4 . L o c a t i o n
2 - 5 .
F i g u r e 2 - l p r o v i d e s d i m e n s i o n s o f a t y p i c a lRadio Set AN/MRC-85 insta l lat ion. This f iguremay be used in locating the van hardstand (para2-36) with respect to other vans in the faci l i ty ,in preparing the cable trenches, and in providinga suitable area of compacted gravel in the s i te
a r e a .
2 - 6 .
If the locat ion of the operat ions van within thes i te i s not dictated by s i te planning, i .e . , pre-viously prepared hardstands, cable trenches, etc.,determine the best location for the fulfillment ofthe operations van requirements as to reliability,and then determine what is required to extendservices to the subscriber.
2 - 7 . Limitat ions With Respect to Logist ics and
O p e r a t i o n
2 - 8 .
In selecting a location for the operations van it isimportant to consider the following logistic andoperational factors:
a. Type and location of roads.
b. Earth moving and clearing requirements.
c. Weather data.
d. Corrosion conditions.
e. Material handling facilities at the site.
f. Potable water availability.
g . D i s t a n c e b e t w e e n t h e o p e r a t i o n s v a n a n dpower amplif ier van ( l imit& by duct lengths) .(See fig. 2-1.)
2 - 9 . E q u i p m e n t C o n s i d e r a t i o n s
2 - 1 0 . S h e l t e r i n g
2-11.
T h e s e m i t r a i l e r v a n p r o v i d e s a w e a t h e r p r o o fshelter for the equipments comprising the opera-tions van. When it is desirable to further protectthe operations van from the elements, the follow-ing means are provided:
a . I n s t a l l a t i o n o f a c o v e r e d p a s s a g e w a y b e -tween the operat ions and power ampli f ier vans(para 2-66) .
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2-12. Primary AC Power
2-13.Primary ac power requirements for the opera-tions van are listed in table l-l.
2-14. Cabling
2-15.Signal and power cabling for the operations van,except subscriber cabling, is shipped with the op-erations, power amplifier, or diesel generatorvans. Cables shipped with the operations van arelisted in table 1-3. Refer to the applicable techni-cal manual for a list of cables required for opera-tion but shipped in another van. Subscriber ca-bling will be determined by site location and re-quirements.
2-16. Grounding
2-17. Neutral Power Line and Ground Strip
Figure 2-1. Tvpical Site Layout.
2-2
2-18The neutral wire of the primary ac input poweris physically connected to the operations vanground strip at the power entrance box.
2-19The ground strip runs from the power entrancebox around the-operations van interior near thefloor level. For grounding of equipments withinthe operations van connect the ground lead of thespecific equipment to the grounding strip.
2-20. Ground Rods
2-21Six 5-foot ground rods with couplings and a driv-ing stud are supplied with the operations van toprovide an external ground. The ground rodsmust be coupled together and driven their fulllength into the ground where possible but in nocase less than 10 feet. Where it is not possible todrive the ground rods to a depth of at least 10 feetan alternate method using a ground plate may beused. Refer to paragraph 2-68 or 2-70 for ground-ing instructions.
2-22. Local or Remote Control Requirements
2-23. Local Control Requirements
2 - 2 4All equipment comprising the operations vancovered in this technical manual is locally con-trolled by panel mounted controls except forvan brake systems and 24-volt dc lights. Refer tochapter 3 for location and function of controls.
2-25. Remote Control Requirements
2 - 2 6The stop, running, clearance, and emergencylights on the operations van require 24 volts dcfor operation. The brake system requires approxi-mately 70 psi of air pressure for operation. AnM-48, M-52, or M-221 truck tractor will supplythe necessary voltage and air pressure needed foroperation. They also contain the necessary con-trols for operating the van lights and brake sys-tems.
2-27. Special lnstallation Requirements
2-28. Equipment Transported in PowerAmplifier Van
2 - 2 9The following equipment, transported in the
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2-3Figure 2-2. Typical Hardstand Layout.
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a. Two air duct hoses.
b. A passageway weatherhood.
c. Two transition duct frames.
d. A vestibule covering.
e. A passageway platform.
2-30 . in DieselEquipment TransportedG e n e r a t o r V a n
2 - 3 1 .
The following equipment, transported in the die-sel generator van, is required for installation ofthe operations van:
a. A passageway frame.
b. A passageway platform.
c. A vestibule frame.
d. A 100-foot power cable.
e. A 100-foot signal cable.
2-32. Allied Construction Requirements
2-33. Trenches and Ground Cover
2-34. TrenchesA trench, 2-feet deep and 1 1/2-feet wide, should
S e c t i o n I I . L O G I S T I C S
2-38. Receiving Data
2 - 3 9 .The operations van is shipped as a complete opera-tional unit except for those items listed in tablel-4. In addition, waveguide components and tran-sit cases used with other components of RadioSet AN/MRC-85 are stored in the operations vanfor shipment and are listed in table 1-3.
2 - 4 0 .
Floor plan arrangement of the operations van isshown in figure 2-3, with waveguide and transitcases removed.
2 - 4 1 . Transportation and Material HandlingE q u i p m e n t
2 - 4 2 .
Overall dimensions of the operations van permittransportation by rail, water, or by C-124, C-130,or C-133 aircraft. A prime mover is required to
be provided for the power and signal cable. Re-fer to the applicable detailed site plan for trenchconstruction details.
2-35. Ground CoverAt least three inches of crushed gravel or othersuitable compactable material should be spreadaround the operations van.
2-36. Typical Hardstand Layout
2 - 3 7 .After the position has been selected, the op-erations van should be installed on steel rein-forced, concrete hardstands. The hardstands (fig.2-2) must be constructed with the following char-acteristics :
a. All concrete used must have a minimumcompressive strength of 2500 psi, 28 days afterpouring.
b. The reinforcing steel used must be of struc-tural grade, new billet, plain bar type (fs + 18,000psi). All bars should be tack welded together.
c. A minimum of 3 inches of concrete mustcover all steel bars.
d. Compacted material around the hardstandsmay be coral, gravel, or other suitable materialfound locally.
move the operations van overland. Other materialhandling equipment used depends upon what isavailable at a particular site and must be de-termined by the installer.
2-43. Cable Requirements
2 - 4 4 .Table 2-l lists all power and signal cables inter-connecting the operations van with the poweramplifier van, diesel generator van, and subscrib-ers.
2-45. Unpacking and Unit Identification
2 - 4 6 .Components comprising the operations van areshipped operationally installed and need not beunpacked. However, transit cases and waveguidecomponents used with other components of RadioSet AN/MRC-85 and shipped in the operationsvan must be removed. Refer to figures 6-10 and6-25 for identification and location of components.
2 - 4
2-47 . Removal of Transit Cases, WaveguideComponents, and Sunroof Tarpaulin
2-48.Remove transit cases, waveguide components, andsunroof tarpaulin from the operations van as fol-lows :
CAUTIONA minimum of four men is required tounpack this equipment.
a. Remove the two screws at the top and thescrews at the bottom of the curbside door centerpost. Remove the post from the operations van.
b. Remove the retaining straps and hardwaresecuring transit case number 7, stowed near thecurbside doors, and remove the transit case fromthe operations van.
c. Remove the retaining straps and hardware
TM 11-5820-763-15
securing the sunroof tarpaulin in the stowageposition between the air conditioners, and removethe tarpaulin through the rear door.
d. Remove the retaining straps and hardwarefrom transit case number 4, strapped to the road-side air conditioning unit, and remove the casethrough the rear door.
e. Remove the retaining straps and hardwarefrom transit cases number 5 and number 6, strap-ped to the curbside air conditioning unit, and re-move the cases through the rear door.
f. Remove waveguide components as follows(see fig. 2-4) :
CAUTIONExercise care when handling the wave-guide components to prevent dentingthem.
Figure 2-3. Operations Van Floor Plan.(Located in back of manual.)
2-5
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Table 2-1. Cable Requirements
2-6
Cable Assembly
w314 (350 MCM,typeG, 3 con-ductors)
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
Table 2-1. Cable Requirements (cont)
Primary acpower input
NOTE
From-
Diesel generatorpower outputpanel, ter-minal:
J603
Carefully examine each waveguide sectionas it is removed and report any damage,including small dents, to the properauthority.
(1) Unscrew the rack fasteners at each endof the topmost waveguide section WR-975 H-plane bend 24-inch radius (V).
(2) Disengage the waveguide section fromthe upright support and remove the wave-guide section from the operations van.
(3) Repeat steps 1 and 2 for the other fivesections of WR-975 H-plane bend 24-inch radius waveguide.
(4) Unscrew the rack fastener at each end ofthe topmost waveguide section WR-975E-plane bend 24-inch radius (U).
(5) Disengage the waveguide section fromthe upright support and remove the wave-guide section from the operations van.
(6) Repeat steps 4 and 5 for the other threesections of WR-975 E-plane bend 24-inchradius waveguide.
(7) Unscrew the 16 rack fasteners whichhold the eight 62-inch upright supports tothe floor and remove the upright supportsfrom the operations van.
(8) Disengage the clamps on the two endupright supports of the uppermost rftransmission line (R).
(9) Remove the rf transmission line from theopera t ions van .
To-
Operations vanpower entrancebox, terminal:
J513 100
Termination
Female insert, 6 con-tact, Pyle Nationalpart no. 22M-CB-1028-18S
(10) Disengage the clamps on the two endupright supports of the next lower sec-tion of the rf transmission line (S)and remove the rf transmission linefrom the operations van.
(11) Loosen the rack fasteners on the threeupright supports of the waveguide sec-tion located immediately below the rftransmission line removed in step10 (T).
(12) Remove the waveguide section from theoperations van.
(13) Repeat steps 11 and 12 for the remaining5 sections of waveguide on the uprightsupports.
(14) Unscrew the floor and ceiling rackfasteners which hold the three uprightsupports in place and remove the threeupright supports from the operationsvan.
(15) On the roadside of the operations van,disengage the topmost clamps from thethree foremost upright supports.
(16) Remove the top rf transmission line(M) from the operations van.
(17) Disengage the clamps on the next lowersection ( N) of rf transmission line andremove the section of rf transmissionline from the operations van.
(18) Disengage the two clamps holding thenext lower section of rf transmissionline ( P) onto the two foremost uprightsupports and remove the section of rftransmission line from the operationsvan.
2-7
2-8
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Figure 2-4. Operations Van Waveguide Storage.
(19) Disengage the clamp holding the elbowassembly (Q) on to the foremost upright support
and remove the elbow assembly from the opera-tions van.
(20) Loosen the rack fasteners holding thenext section of waveguide (J) onto the second
and third upright supports and remove the wave-guide section from the operations van.
(21) Loosen the rack fastener holding thenext section of WR-975 waveguide (K) onto thefirst, second, and third upright supports and re-move the waveguide section from the operationsvan.
(22) Loosen the rack fasteners holding thenext section of WR-975 waveguide (L) onto thefirst and second upright supports and remove thewaveguide section from the operations van.
(23) Disengage the clamp holding the elbowassembly (H) onto the third upright support andremove the elbow assembly from the operationsvan.
(24) Disengage the topmost clamp holding therf transmission line section (C) onto the fourth,fifth, and sixth upright supports and remove therf transmission line section from the operations
van.
(26) Disengage the next lower clamp holdingthe rf transmission line section (B) onto thefourth, fifth, and sixth upright supports and re-move the rf transmission line section from theoperations van.
(26) Loosen the rack fasteners holding theWR-975 step twist waveguide section (D) ontothe fourth and fifth upright supports and removethe waveguide section from the operations van.
(27) Loosen the rack fasteners holding thenext lower section of WR-975 step twist wave-guide (D) onto the fourth and fifth upright sup-ports and remove the section of waveguide fromthe operations van.
(23) Loosen the rack fasteners holding thenext lower waveguide section tuning stub assem-bly(E) onto the fourth and fifth upright supportsand remove the tuning stub assembly from theoperations van.
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(29) Loosen the rack fasteners on the firstfive upright supports of the next section of WR975 waveguide, (F) and remove the waveguidesection from the operations van.
(30) Repeat step 29 for the next two lowersections of waveguide.
(31) Loosen the ceiling and floor rack fasten-ers securing the ‘first five upright supports fromthe operations van.
(32) Loosen the rack fasteners holding thetopmost section of WR-975 straight waveguidesection (A) onto the rear four upright supports,and remove the waveguide section from the opera-tions van.
(33) Repeat step 32 for the next five lowerwaveguide sections.
(34) Loosen the rack fasteners securing therear four upright supports to the floor.
(36) Loosen the rack fasteners securing therear and fourth-from-rear upright supports to theceiling, and remove the supports from the opera-tions van.
(36) Loosen the rack fasteners securing thesecond and third-from-rear upright supports tothe roadside air conditioning unit and remove thesupports from the operations van.
(37) Using a screwdriver, close the protec-tive plate covers of each of the floor cargo tie-downs.
g. Install the curbside door center post by per-forming the reverse of step a.
2-49. Removal of Sealing Tape andPreservative
2 - 5 0
Remove all sealing tape which has been placedover openings of the operations van. Using c!ean-ing solvent (Federal Specification P-S-661) cleanadhesive from all parts from which tape is re-moved. Remove preservative lubricating oil fromsteps of ladders and walking surfaces of plat-forms with cleaning solvent.
Section III. INSTALLATION PROCEDURES
2-51
A minimum of four men is required to install the
for description and location of components stor-ed in and on the operations van.
operations van. Refer to TM 11-5820-763-25P 2-52. Emplacement
2-9
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2-53. Positioning
2-54.To position the operations van, proceed as fol-lows :
a. TOW the operations van onto its previouslyprepared concrete hardstand (fig. 2-2).
b. Carefully position the van so that the land-ing gear and leveling jack assemblies are centeredover their respective hardstand pads.
C. Set the hand air-brake controls in the primemover.
d. Remove the chock blocks from their carriersand place one block under each set of the opera-tions van’s dual wheels.
e. Remove the crank handle from its support.(See fig. 2-5.)
NOTEBefore operating the crank handle care-fully read the landing gear instructionplates attached to either side of the vannear the landing gear control crank-shafts.
f. Push the crank handle onto the landing gearcontrol crankshaft until the crank handle engagesthe pin.
NOTEWhen the landing gear assembly crankhandle is inserted in the gear box thefull limit, the gear box will operate thelanding gear through low-speed travel.High-speed travel adjustments to thelanding gear are made by removing thelanding gear crank handle to the “outposition.”
g. Set the ratchet on the crank handle shaftto the right and rotate the crank handle counter-clockwise until the landing gear shoe is firmlyseated on the ground.
h. Repeat steps e through g for the other land-ing gear assembly.
i. Close the shut-off cocks on the service andemergency air lines at the rear of the primemover.
NOTEAir pressure in the air reservoir auto-matically applies brakes to the opera-tions van when air hose connections be-
tween the prime mover and operationsvan are broken.
j. Uncouple the two air-brake hoses from theSERVICE and EMERGENCY air hose couplingsat the front of the operations van.
k. Fit the dummy couplings onto the opera-tions van air hose couplings to prevent dust anddirt from entering the air line system.
l. Disconnect the 24-volt dc intervehicular ca-ble from the electrical connector at the front ofthe operations van.
m. Release the operations van king pin fromthe prime mover fifth wheel by pulling out thejaw lock handle on the prime mover.
n. Drive the prime mover forward until theoperations van becomes disengaged from theprime mover.
Figure 2-5. Landing Gear Assembly Adjustment.
2 - 1 0
Figure 2-6. Leveling Jack Assembly Adjustment.
2-55. Leveling2 - 5 6 .To level the operations van, perform the follow-ing procedures :
a. Remove the quick-release pins holding therear brace in towards the rear center of the op-erations van. (See fig. 2-6.)
b. Slowly lower the leveling jack assembly.
c. Remove the quick-release pin holding the sidebrace and allow the side brace to swing downfrom its storage position. With the quick-releasepin, attach the side brace to the side gusset of theleveling jack assembly.
d. Swing the rear brace up and secure it withthe quick-release pin.
e. Remove a leveling jack bar from the toolbox located on the curbside of the skid base.
f. Remove a leveling jack shoe from its storageposition on top of the skid base towards the rearroadside of the operations van.
g. Center the leveling jack shoe directly underthe leveling jack screw.
h. Insert the leveling jack bar through the slot
TM 11-5820-763-15
in the leveling jack screw and turn until thescrew is firmly seated in the shoe.
i. Repeat steps a through h for the other level-ing jack assembly.
NOTEA bench level is located near each of thelanding gear control crankshafts and onthe front and rear center exterior of theoperations van.
j. While observing the bench levels, alternatelyadjust the two leveling jack assemblies and thetwo landing gear assemblies until the operationsvan is level.
k. Return the crank handles and leveling jackbars to their stowage positions.
2-57. Installation
2-58. Personnel Ladder Installation
NOTEPersonnel ladders are utilized when thepassageway platform or vestibule are notinstalled.
2 - 5 9 .To install the personnel ladders, refer to figure2-7 and proceed as follows:
a. Remove a personnel ladder from its under-van stowage position and place it at the curbsidedoor.
b. Turn both lock handles on the personnel lad-der inward towards the steps.
c. Insert the two lock assemblies on the per-sonnel ladder into the lock assembly holes on theoperations van.
d. Turn both lock handles outward to lock thepersonnel ladder in place.
e. To install a personnel ladder at the rear door,repeat steps a through d.
2-60. Vestibule Installation
2-61TO install the vestibule, refer to figure 2-8 andperform the following procedural steps:
NOTEA minimum of two men is required toinstall the vestibule.
a. Remove the vestibule platform from its un-dervan stowage position.
2-11
TM 11-5820-763-15h. Place the vestibule framed roof on the three
support poles and tighten the set screws.
i. Insert five pivot pins into the five hingedflanges where they mate with the single mountingassemblies.
j. Place the vestibule covering over the vesti-bule framed roof and around the support poles.Fasten it at the top and side of the vestibulemounting frame by snapping the cover grommetsover the studs.
k. Fasten the vestibule covering along the frontand side of the vestibule platform.
2-63.
Figure 2-7. Personnel Ladder Installation.
b. If a personnel ladder is installed below curb-side doors of the operations van, remove it byperforming the reverse of paragraph 2-59.
c. Position the vestibule platform so that itslock pins are in line with the slotted holes be-low the curbside door of the operations van.
d. Raise the vestibule platform and insert thelock pins into the slotted holes.
e. Slide the vestibule platform down so that thelock pins lock into the slots. Insure that the vesti-bule platform is held securely in place.
f. Install a personnel ladder on the rear of thevestibule platform as described in paragraph 2-59.
NOTEThe vestibule framing and fittings andvestibule framed roof are stored in thediesel generator van. The vestibule cover-ing is stored in the power amplifier van.
g. Insert the three support poles into the threebase flanges on the vestibule platform and tightenthe set screws.
2 - 6 2 . P a s s a g e w a y P I a t f o r m l n s t a l l a t i o n
For installation of the passageway platform theoperations van and power amplifier van must bein the positions shown in figure 2-1 with the reardoor of the operations van aligned with the roadside door of the power amplifier van. To installthe passageway platform, refer to figure 2-9 andPerform the following procedures :
a. Remove the passageway platform from thediesel generator van.
b. Place the passageway platform at the opera-tions van rear door so that its locking pins are inline with the slotted holes below the door.
c. Raise the passageway platform and insertthe locking pins into the slotted holes.
d. Slide passageway platform down so that thelocking pins lock into the slotted holes.
e. Obtain the passageway platform from thepower amplifier van.
f. Place the passageway platform at the poweramplifier van roadside door so that its locking 1pins are in line with the slotted holes below thedoor.
g. Repeat steps c and d.
h. Install the hinged portion of the spread-plate on one of the platforms and swing the plateonto the other platform.
NOTEThe spreader plate provides continuitybetween platforms for movement of per-sonnel and equipment.
2-12
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Figure 2-8. Vestibule Installation.2-13
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Figure 2-9. Passageway and Air ConditionerDucts Installation.
2 - 6 4 .
2-65.Air Conditioner Ducts Installation
Both the operations and the power amplifier vansare equipped with air conditioner return and sup-ply ports. The air conditioners are located in theoperations van and, in order to extend air condi-tioning to the power amplifier van, ducts must beinstalled between the two vans. The interconnect-ing air conditioner ducts are installed after the
vans have been positioned at a terminal site, anthe interconnecting passageway platform is inplace. To install the interconnecting air condi-tioner ducts, refer to figure 2-9 and perform thefollowing procedures :
a. Loosen the camloc fasteners on the covers ofthe air conditioner air return and supply portslocated on the rear of the operations van (fig.l-4) and on the roadside of the power amplifiervan above the doors. Remove the covers.
2-14
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b. Remove the four transition duct framesfrom the inside of the front doors of the poweramplifier van. (Store the covers removed in stepa in the positions from which the transition ductframes are removed.)
c. Install the transition duct frames on theports from which the covers were removed.
d. Remove the ten adjustable rods from thecanvas bag stored on top of the operations vanroadside air conditioner unit.
e. Loosen the thumbscrew on oneo f the adjustable rods.
f. Insert one end of the adjustable rod into asocket on one of the transition duct frames on theoperations van.
g. Insert the other end of the adjustable rod tothe corresponding socket of the transition ductframe directly opposite on the power amplifiervan and tighten the thumbscrew.
h. Repeat steps e through g for the other nineadjustable rods.
i. Remove the two air conditioner duct hoseassemblies from the power amplifier van.
j. Wrap one of the air conditioner duct hoseassemblies around one set of five adjustable rods.
k. Fasten the strap at each end of the air con-ditioner duct hose assembly.
l. Snap the grommet fasteners over the studsmounted along the length of the air conditionerduct hose assembly.
m. Repeat steps j through l for the other airconditioner duct hose assembly.
2-66. Passageway Weatherhood Installation
2 - 6 7
To install the passageway weatherhood, removeit from storage in the power amplifier van, referto figure 2-9, and perform the following proce-dures :
a. Obtain the two passageway covering supportrod assemblies from the diesel generator van.
b. Place the three rod ends of one of the passage-way covering support rod assemblies into thehinged flanges, above the operations van air con-ditioner air return and supply ports (fig. l-4)and secure with pins provided with the assem-blies.
c. Mount the other end of the passageway cover-ing support rod assembly into the hinged flangesdirectly opposite above the power amplifier vanair conditioner duct port.
d. Repeat steps a through c for the other pas-sageway covering support rod assembly.
e. Spread the passageway weatherhood, overthe passageway covering support rod assembliesso that the grommets are aligned with the studson the operations and power amplifier vans. Snapthe grommets over the studs.
2-68. Ground Rod Assembly Installation
2 - 6 9
To establish an electrical ground for the opera-tions van, screw the driving stud to a groundrod and proceed as follows:
NOTEThe ground rod assembly must be drivento a minimum depth of 10 feet.
a. Using a sledge hammer, drive the entirelength of ground rod assembly into the ground.
b. Remove the driving stud from the groundrod.
c. Screw the driving stud to another groundrod section and attach this ground rod section tothe one driven into the ground in step a. Repeatstep a.
d. Repeat steps b and c until all the groundrods are driven into the ground. Remove the driv-ing stud.
e. Connect one end of the grounding cable toone of the GND terminals on the power entrancebox. (See fig. 2-10).
f. Extend the grounding cable from the opera-tions van to the ground rod assembly allowingenough slack for the cable to hang straight downfrom the power entrance box.
g. Bury the grounding cable approximately 12inches below the surface, leaving enough cableexposed at its end to make a connection to theground rod assembly.
h. Attach the grounding cable to the groundrod assembly with the ground rod clamp.
2-70. Alternate Grounding Installation
2-71Where it is not possible to drive the grounding
2-l5
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NOTEThe installation of a copper plate may bemodified as deemed necessary, based up-on the conditions at a particular site.
2-72. Tarpaulin Sunroof Installation
2-73To install the tarpaulin sunroof on the operationsvan, refer to figure 2-12 and proceed as follows:
NOTEFour men are required to install the tar-paulin sunroof.
a. Using the 12-foot ladder to gain access, posi-tion two men on the roof of the operations van.
b. Remove the tarpaulin bow assemblies fromunder the operations van and install one of theoffset tarpaulin bow assemblies over the bowblocks at the front of the van. Tighten the fasten-er.
c. Similarly, install the other offset tarpaulinbow assembly at the rear of the operations van.
Figure 2-10. Power Entrance Box.
rod to a minimum depth of 10 feet because ofsoil conditions, install a copper plate as shown infigure 2-11 to provide a sufficient ground for theoperations van.
SURFACE
APPROX 24” CHARCOAL DUST BRAZE
COPPER PLATE GROUND3’ 3” x 3’ 3” x l/4” CABLE TO
OPERATIONSA421/0623-019 VAN
Figure 2-11. Alternate Grounding Installation.
d. Install the thirteen straight tarpaulin bowassemblies over the remaining bow blocks as de-scribed in step b.
e. Place the sunroof tarpaulin, removed fromoperations van in paragraph 2-48, on the opera-tions van roof.
f. Unfold the sunroof tarpaulin and place itover the tarpaulin bow assemblies so that thecenter lashing ropes at the front and rear aredirectly opposite the hooks.
g. Tie the front center lashing rope to its as-sociated hook.
h. Lash the front edge of the sunroof tarpaulinto the offset tarpaulin bow assembly.
i. Tie the ends of the rope to the base of theoffset tarpaulin bow assembly at either side ofthe operations van.
j. Working from front to rear, pull the sun-roof tarpaulin taut and tie the lashing ropes ex-tending from the grommets to the associated tar-paulin bow assembly.
k. Secure the rear edge of the sunroof to theoffset tarpaulin bow assembly as described in stepsh and i.
2-16
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Figure 2-12. Tarpaulin Sunroof Installation.
2-17
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2-74 . Interconnecting Cabling Installation
2 - 7 5
The cables required to interconnect the opera-tions van with the power amplifier van, dieselgenerator van, and subscriber are listed in table2-l. Interconnecting cable diagrams are includedin Chapter 6 of this technical manual. Refer tofigure 2-10, 2-13, and 2-14 for location of con-nectors and connect the cables as described intable 2-1.
2-76 . Postinstalllation Tuneup and Test
2 - 7 7
There are no postinstallation alignments, adjust-ments, tuneup, or tests required for the operationsvan except those described in individual equip-ment technical manuals, a list of which is includedin appendix A to this technical manual.
Figure 2-13. Audio and Alarm Box.
2-18
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Figure 2-14. Signal Line Extension Box.
Section IV. PREPARATION FOR RESHIPMENT
2-78. Introduction 2-82. Conditions of Reshipmenf
The instructions necessary to prepare the opera- 2 - 8 3tions van for reshipment are presented in thissection. Before preparing the equipment for re-shipment, review the information provided inparagraphs 2-38 through 250 in Section II ofthis chapter.
The decontamination port on the forward curb-side door must be loosened to prepare the opera-tions van for aircraft reshipment. This is doneto equalize pressure within and outside the oper-ations van.
2-79. Methods and Conditions of Reshipment 2 - 8 42-80. Methods of Reshipment
2 - 8 1
When the operations van is to be reshipped bysea, a preservative oil must be applied to allexposed metal parts to retard corrosion.
The operations van is transportable by air, sea,or rail flat car, or may be towed overland by aprime mover.
2 - 8 5Space limitations may require that the operations
2-19
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
van be shipped on its skid base. To prepare theoperations van for such shipment, refer to para-graph 2-98.
2 - 8 6 .2 - 9 4 .
Perform the preventive maintenance routines(table 5-0.1) pertaining to operations van ex-ternal components. Special emphasis should beplaced on those routines pertaining to lubrica-tion and mechanical adjustment and tests. Re-pair or replace all defective components. Referto Chapter 5 of this technical manual for main-tenance instructions.
2 - 8 7 . Removal and Storage of Components
2 - 8 8 .
The following paragraphs provide informationnecessary to remove and store the componentscomprising the operations van.
2 - 8 9 .Insure that the primary ac power to the opera-tions van and to equipments in the van is re-moved before preparing the equipment for re-shipment. Refer to Chapter 3, Section II, of thistechnical manual for turn-off procedure.
2 - 9 0 . Removal and Storage of Interconnecting C a b l i n g
2 - 9 1 .
Remove only those cables listed in table 2-1 andplace them in their respective storage containers(see table 1-3).
NOTEConnect the 24-volt dc intervehicularcable from the prime mover to the 24-volt dc input connector at the front ofthe operations van to provide interiorlighting of the van.
2-92. Operations Van Interior
2 - 9 3 .Before storing components in the operations van,insure that the following precautions are ob-served:
a. Check that all hardware, such as nuts, bolts,screws, and washers, is attached to associatedcomponents.
b. Check that all equipment in the van is se-curely fastened to the mountings to prevent move-ment during shipment.
c. Insure that weather stripping around coversand doors is intact and inserviceable condition.
To remove and store components in the opera-tions van, proceed as follows:
a. Remove the two screws at the top and bot-tom of the curbside door center post.
b. Remove the post.
c. Install transit case number 4 between theroadside air conditioner and rear wall. Securewith retaining straps.
d. Securethe curbside
transit cases numbersair conditioner.
5 and 6 to
e. Place test equipment dolly and service cartin storage position and secure with attachedknob assemblies.
NOTE
Waveguide components are not part ofthe operations van but are stored in thevan during shipment.
f. Install waveguide components in the opera-tions van by performing the reverse of the pro-cedures contained in paragraph 2-48 step f.
g. Perform the reverse of the procedures con-tained in paragraph 2-72 to remove the tar-paulin sunroof from the roof of the van.
h. Install the tarpaulin sunroof in its storageposition between the two air conditioners byperforming the reverse of the procedures con-tained in paragraph 2-48 step c.
i. Install transit case number 7 in its storageposition near the curbside doors, and secure withretaining straps and associated hardware.
j. Replace curbside door center post and securewith two screws at top and bottom.
k. Disassemble, clean, and install the groundrod assembly in its storage position on the curb-side doors and secure with associated hardware.
2-95. Operations Van Exterior
2 - 9 6 .
Various items are normally stored beneath theoperations van during- shipment (refer to para2-97 for exceptions). To remove and store theseitems, proceed as follows:
2 - 2 0
CAUTIONInsure that landing gear shoes are rest-ing firmly on the ground, wheel chock-ing blocks are in place, and crank han-dles on landing gear assemblies are inthe “out” position before performingthe following procedures.
a. To remove and store the passageway wea-therhood, perform the reverse of the procedurescontained in paragraph 2-66.
b. To remove and store the air conditionerducts, perform the reverse of the procedurescontained in paragraph 2-64.
c. To remove and store the passageway plat-forms, perform the reverse of the procedurescontained in paragraph 2-62.
d. To remove and store the vestibule, performthe reverse of the procedures contained in para-g r a p h 2 - 6 0 .
e. To remove and store the personnel ladders,perform the reverse of the procedures containedin paragraph 2-58.
f. To connect a prime mover to the operationsvan, perform the reverse of the procedures con-tained in paragraph 2-54 steps i through n.
g. To retract and store the landing gear andleveling jack assemblies, perform the reverse ofthe procedures contained in paragraphs 2-54steps e through h and paragraph 2-56 steps athrough k.
h. Close all covers and doors and seal withwaterproof, pressure sensitive tape conformingto Type III, Class I of Federal Specification PPP-T - 6 0 .
i. Check that all reflectors, running lights,stop lights, turn indicators, and tail lights arein operating condition.
TM 11-5820-763-15
NOTEFor rail shipment exterior lamp are re-flector lenses must be completely coveredwith kraft paper and tape conformingto Type III, Class I of Federal Specifi-cation PPP-T-60.
2-97. Special Mountings
2-98. Skid Base
2-99.The operations van is normally shipped as acompletely assembled unit. However, due to lim-ited overhead clearance, shipment by certain typesof aircraft may necessitate removal of the under-van suspension system and certain stowed items.To facilitate loading under such conditions, theoperations van is equipped with a permanentlymounted skid base. Although removal proceduresfor the suspension system, and for items whichextend below the skid base, are obvious, refer-ence to the vehicle support leveling jacks, suspen-sion assembly, retractable support, and storage ofundervan equipment figures in TM 11-5820-763-25P may be useful.
2-100. Waveguide Mountings
2-101.Waveguide components are not a part of, butare shipped with, the operations van. Waveguidesupports, retainer clamps, and attaching hard-ware are provided as a part of the waveguideassembly and are installed in the operations vanto secure waveguide components during ship-ment.
2 - 1 0 2 .For location and installation of waveguide com-ponents shipped with the operations van, referto figure 2-4 and perform the reverse of theprocedures contained in paragraph 2-48 step f.
2 - 2 1
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CHAPTER 3
OPERATION
3-1. IntroductionThis chapter furnishes the information neededto operate the operations van. Section I lists and
for proper operation. Section II describes thecorrect method of applying power, and providesoperating and normal power removal procedures.Section III contains emergency operation proce-
illustrates the controls and indicators necessary dures.
Section I. CONTROLS AND INDICATORS
3-2. General
3 - 3
The controls and indicators associated with theoperations van are covered in this section. Forillustrations and description of controls and in-dicators on the individual equipments not cov-ered in this publication, refer to the applicableequipment technical manuals listed in AppendixA.
3-4. Operations Van Exterior
3 - 5Table 3-l lists and describes all controls and
indicators located on the operations van exterior.These controls and indicators are illustrated infigures 3-1 through 3-6 except where noted intable 3-l.
3-6. Operations Van Interior
3 - 7Tables 3-2 through 3-5 list describe all controlsand indicators located inside the operations vanwhich are not covered by equipment manuals.These controls and indicators are illustrated infigures 3-7 through 3-11.
Table 3-l. Operations Van Exterior, Controls and Indicators
Air reservoir drain cock (fig. 3-1)
Brake lining adjusting screw (fig. 3-l)Bench level (fig.3-2)Blackout stop light (fig. 3-3)Landing gear assembly (fig. 3-4)
Crank handleRatchet
Leveling jack assembly (fig. 3-5)Leveling jack screw (fig. 3-5)Roadside radius rod (fig. 3-1)Running lights (fig. 4-l)Spare tire carrier (fig. 3-6) :
Operating shaftRatchet
Shutoff cocks (fig. 3-l)Tail lights, (fig. 3-3)
Drains moisture from the air reservoir and relieves air pressure in airbrake system
Adjust brake linings to compensate for wearIndicates horizontal inclinationFunctions as stop indicator under blackout conditionsSupports and adjusts level of operations vanControls operation of landing gearSelects desired direction of landing gear travelAdjusts level of operations vanControls operation of leveling jackAdjusts axle alignmentFunction as clearance indicators
Raise and lower spare tire carrierControls operation of operating shaftControl air supply to trailer towed in tandemFunction as stop and clearance indicators
3 - 1
TM 11-5820-763-15
Figure 3-1. Under Van Controls.
Name
VAN LIGHTS circuit breaker 1
VFTG RECORDER & AUX EQUIPcircuit breaker 2
VAN LIGHTS circuit breaker 3
MUX circuit breaker 4
CONVENIENCE OUTLET(EXTERNAL) circuit breaker 5
MUX circuit breaker 6
CONVENIENCE OUTLET(EXTERNAL) circuit breaker 7
CONVENIENCE OUTLET(INTERNAL) circuit breaker 8
SPARE circuit breaker 9
VFTG circuit breaker 10
Table 3-2. AC Power, Controls and Indicators
Function
CB501
CB502
CB503
CB504
CB505
CB506
CB507
CB508
CB509
CB510
D i s t r i b u t i o n B o x ( f i g . 3 - 7 )
Applies primary ac power to operations van interior light switches
Applies primary ac power to voice frequency telegraph group rack no.2.
Applies primary ac power to operations van interior light switches
Applies primary ac power to multiplexer equipment racks
Applies primary ac power to weatherproof duplex outlets on exterioroperations van
Applies primary ac power to multiplexer equipment racks
Applies primary ac power to weatherproof duplex outlets on exteriorof operations van
Applies primary ac power to convenience outlets in operations vaninterior
Spare, 20 amperes
Applies primary ac power to voice frequency telegraph group rackno. 1
3 - 2
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Figure 3-2. Bench Level. Figure 3-4. Landing Gear Assembly.
Figure 3-3. Stop Indicators. Figure 3-5. Leveling Jack Assembly.
Figure 3-6. Spare Tire Carrier. 3-3
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Figure 3-7. Distribution Box.3 - 4
Table 3-2.
TM 11-5820-763-15AC Power, Controls and Indicators (cont)
NameReference
Designation
INDICATOR FAULT LOCATINGNO. 2 circuit breaker 11
PERF MON.BAY NO 2 circuitbreaker 12
PERF MON BAY NO 1 circuitbreaker
SPARE circuit breaker 14INDICATOR FAULT LOCATING
NO 1 circuit breaker 15AUDIO & TEL SET circuit
breaker 16SPARE circuit breaker 17TEST EQUIP RACK & J509 cir-
cuit breaker 18
CB511
CB512
CB513
CB514CB515
CB516
CB517CB518
AIR CONDITIONER NO 1 circuitbreaker 19
AIR CONDITIONER NO 2 circuitbreaker 26
MAIN CIRCUIT BREAKER(fig. 3-8)
CBS19
CB526
Van lights switch (fig. 3-8) S502
Van lights switch (fig. 1-3) S503
Van lights switch (fig. 3-8) S504
Van lights switch (fig. 1-3) S505
FREQUENCY meter
POWER MONITOR switch
VOLTAGE meter
Function
Applies primary ac power to fault locating indicator
Applies primary ac power to performance monitorbay no. 2
Applies primary ac power to performance monitorbay no. 1
Spare, 20 amperesApplies primary ac power to fault locating indicator
no. 1Applies primary ac power to convenience outlet far
order wire telephone equipment rackSpare, 20 amperesApplies primary ac power to convenience outlet for
test equipment rack and to J509 on signal line ex-t e n s i o n b o x
Applies primary ac power to air conditioner no. 1
Applies primary ac power to air conditioner no. 2
Applies primary ac power to equipment in operationsv a n
Applies primary ac power to operations van interiorlights
Applies primary ac power to operations van interiorlights
Applies primary ac power to operations van interiorlights
Applies primary ac power to operations van interiorlights
Power Monitor (fig. 3-9)
M501
S501
M502
Measures frequency of input power phases as selectedby POWER MONITOR switch S501
Selects phase of input power to be monitored bymeters M501 and M502
Measures voltages of input power phase as selectedby POWER MONITOR switch S501
Table 3-3. Alarm- itor, Controls and Indicators (fig. 3-10)
Name ReferenceDesignation Function
DS1 24V BATTERY CHARGE DCindicator lamp
DS2 24V BATTERY CHARGE DCindicator lamp
IDS1
DS2
Indicates that 24-volt battery for diesel no. 1 in die-sel generator van is charging
Indicates that 24-volt battery for diesel no. 2 in die-sel generator van is charging
3-5
TM 11-5820-763-15
Figure 3-8. Main Circuit Breaker and Van Light Switches. Figure 3-9. Power Monitor.
3 - 6
TM 11-5820-763-15Table 3-3. Alarm-Monitor, Controls and Indicators (fig. 3-10) (cont.)
Table 3-4. 24-Volt Emergency Lighting, Controls and Indicators
Table 3-5. Recorder Control, Controls and Indicators (fig. 3-11)
3-7
TM 11-5820-763-15
Figure 3-10. Alarm-Monitor
Figure 3-11. Recorder Control.
3-8
TM 11-5820-763-15Section II. OPERATING INSTRUCTIONS
3 - 8 . G e n e r a lThis section provides operating instructions forthe operations van. For operating instructionspertinent to individual equipment not coveredherein, refer to the applicable equipment manualslisted in the Introduction of this manual.
3-9. Primary AC Power Turn On
3 - 1 0
The turn-on procedure for the operations vanis as follows :
NOTEBefore performing the following pro-cedures, insure that all individual equip-ments comprising the operations vanare in the off condition.
a. Set the MAIN CIRCUIT BREAKER locatedon curbside wall to ON.
b. Rotate POWER MONITOR switch througheach position. The FREQUENCY meter shouldindicate between 58 and 62 cycles per second.The VOLTAGE meter should indicate between114 and 126 volts ac at each position.
NOTECircuit breakers are located on the dis-tribution box unless otherwise indi-cated.
c. Set VAN LIGHTS circuit breakers to ONand operate van lights switches S502 and S5O4located under the power monitor or van lightsswitches S503 and S5O5 located on rear wall ofthe operations van. Check that each bank ofceiling lamps light.
d. Set DIESEL NO. 1 ALARM and DIESELNO. 2 ALARM switches on alarm-monitor panelto on. (Lift up to turn on.)
e. Set AIR CONDITIONER NO 1 circuitbreaker and AIR CONDITIONER NO 2 circuitbreaker to ON.
f. Set the two CONVENIENCE OUTLETS(EXTERNAL) circuit breakers to ON.
g. Set CONVENIENCE OUTLETS (INTER-NAL) circuit breaker to ON.
h. Set INDICATOR FAULT LOCATING NO1 and INDICATOR FAULT LOCATING NO 2circuit breakers to ON.
i. Set VFTG RECORDER & AUX EQUIPcircuit breakers to ON.
j. Set the two MUX circuit breakers to ON.
k. Set AUDIO & TEL SET circuit breakerto ON.
1. Set PERF MON BAY NO 1 and PERFMON BAY NO 2 circuits breakers to ON.
m. Set TEST EQUIP RACK & J609 circuitbreaker to ON.
n. Refer to the applicable equipment manualslisted in the Introduction to this manual and per-form the turn-on procedures for the individualequipments.
3-11. Primary AC Power Turn Off
CAUTION
Perform the turn-off procedures forindividual equipments before remov-ing primary ac power from the opera-tions van.
3 - 1 2
To turn off the primary ac power perform thereverse of the procedure outlined in paragraph3-10.
3-13. Emergency Primary AC PowerTurn Off
CAUTIONOnly in extreme emergency should theMAIN CIRCUIT BREAKER be set tothe OFF position before individualequipments have been shut down.
3 - 1 4
To completely shut down the operations van incase of emergency such as arcing, fire, etc., setMAIN CIRCUIT BREAKER located next to thecurbside doors to the OFF position.
3-9
TM 11-5820-763-15
Section III. EMERGENCY OPERATION
3-15. General
3 - 1 6 .
This section contains instructions pertaining toalternate methods of operation which may be ac-complished by patching at the baseband andorder wire patch panel when there is a partialfailure or malfunctioning of components withinthe operations van. Patching facilities incorpor-ated in other equipments comprising the opera-tions van are described in associated technicalmanuals listed in Appendix A to this manual.
3 - 1 7 .
The following general considerations should beobserved relative to patching at the basebandand order wire patch panel:
NOTE
All patches must be coordinated withthe subscriber or distant terminal.
a. Never insert a plug in LIFT jacks unlesspatching of the associated equipment is desired.
b. When a patch has been made, attach a tagto the patch cords listing the name of the in-dividual making the patch, the time and datethat patch was made, and the reason for makingthe patch.
c. Always remove patch cords from baseband and order wire patch panel after defective equip-ment has been repaired and restored to service.
3-18. Baseband Amplifier No. 1 Failure
3 - 1 9 .
Failure of baseband amplifier no. 1 located inreceiver no. 1 will remove baseband signals tothe multiplexer equipment. Normal operation ofthe system may be resumed by patching at thebaseband and order wire patch panel (fig. 3-12)as follows :
a. Insert one end of a patch cord with doubleplug into either REC 2 BB MON, REC 3BBMON, or REC 4 BB MON jacks.
b. Insert the other end of the patch cord intoMUX IN BB LIFT jacks.
3-20. Order Wire Amplifier No. 1 Failure
3-21.
Failure of order wire amplifier no. 1 located inreceiver no. 1 will remove order wire signalssupplied to the order wire telephone equipment.Normal operation may be resumed by patchingat the baseband and order wire patch panel (fig.3-13) as follows:
Figure 3-12. Patching Faulty Baseboard Amplifier.
3 - 1 0
TM 11-5820-763-15
Figure 3-13. Patching Faulty Order Wire Amplifier.
3-11
TM 11-5820-763-15
CHAPTER 4
PRINCIPLES OF OPERATION
4-1 ment. Section II contains a functional electronic
INTRODUCTIONcircuit operation analysis of equipment not cov-
This chapter presents the principles of operationered in other technical manuals. A simplified
of the operations van. Section I contains a func-discussion of signal distribution is also given inthis section. The functional operation of me-
tional system operation analysis of the equip- chanical assemblies is covered in Section III.
Section I. FUNCTIONAL SYSTEM OPERATION
4-2. General
This section contains information concerning thefunctional systems operation of equipment com-prising the operations van. The functional blockand schematic diagrams in Chapter 6 of thismanual will help you to understand the followingdiscussion.
4-3. Operation
4-4. Transmitting
4 - 5
Voice frequency and teletypewriter signals fromthe subscriber lines are supplied to the main dis-tributing frame (MDF). The voice frequencytransmitting signals are isolated from the re-ceiving signals by 4-wire terminating assembliesin the multiplexer set and are supplied to thechannel multiplexers for conversion to signalswithin a particular portion of the baseband fre-quency.
4 - 6
Four of the 72-voice frequency channels are re-served for teletypewriter circuits. The dc signalsfrom subscriber teletypewriter circuits are sup-plied through the MDF to frequency shift tonekeyers where the signals are converted to audiofrequency signals. Twelve of the teletypewritercircuits are combined in each of the four voicefrequency channels and are supplied to the chan-nel multiplexers for conversion to signals withina particular portion of the baseband frequency.
4 - 7The channel multiplexer outputs are routed tothe group multiplexers where they are multi-plexed and supplied to the supergroup modulators.The signals are modulated in the supergroupmodulators and supplied to the transmit linehybrid. The signals are combined in the transmitline hybrid with a pilot (synchronizing) signalfrom the common equipment group into a singleband of frequencies and routed to the line equip-ment shelf assembly. In the line equipment shelfassembly, extraneous signals are removed. The de-sired signals are amplified to a specific level andsupplied through the baseband and order wirepatch panel to exciters 1 and 2.
4 - 8Signals from the order wire telephone set aresupplied directly through the baseband and orderwire patch panel to the exciters.
4 - 9The multichannel voice and teletypewriter sig-nals (baseband) and order wire signals are proc-essed in each exciter to yield a IO-20 watt rfsignal in the uhf band for driving the poweramplifiers located in the power amplifier van.A pilot tone is also generated within the excitersand is mixed with the modulating data to pro-vide a means of monitoring the exciters andreceivers.
4-10. Receiving
4-11The i-f frequency from the power amplifier van
4-1
TM 11-5820-763-15
is routed through the signal line extension boxto the receivers. The baseband signals are sep-arated from the order wire signals in the re-ceiver and supplied to separate combiner circuitswithin the receivers. The output signals from thereceivers are combined to yield a signal having abetter signal-to-noise ratio than the best signalfrom any of the four receivers individually. Theorder wire signals are supplied to the order wiretelephone set through the baseband and orderwire patch panel and the MDF.
4 - 1 2 .The baseband signals containing numerous sub-carrier frequencies including a pilot signal aresupplied via the baseband and order wire patchpanel and the MDF to the receive line hybrid.In the receive line hybrid, the pilot signal isfiltered from the baseband signals and is suppliedto the common equipment group. The basebandsignals are passed through the receive line hybridto the equipments in the demultiplexer and proc-essed to produce 72 voice frequency channel out-put containing 68 telephone and 48 teletypewritersignals.
4 - 1 3 .The 68 telephone signals from the channel de-multiplexers are supplied to the 4-wire terminat-ing assembly and distributed to the subscribervia the MDF and the subscriber lines. The 48teletypewriter signal outputs of the channel de-multiplexers (contained in 4 channels) are sup-plied via the MDF to 48 frequency shift toneconverters and there converted to dc pulses. Thedc pulses are transmitted to teletypewriters viathe MDF and the subscriber lines.
4 - 1 4 .The common equipment group generates the pilotsignal supplied to the transmit line hybrid. Italso provides the required carriers which drivethe multiplexer and demultiplexer equipments.
4 - 1 5 .Three group interconnect filter assemblies pro-vide facilities for interconnecting up to threeU-channel voice frequency groups. These facil-ities are used for “thru group” connections.
4-16. Primary AC Power Distribution
4-17. Unregulated Primary AC Power
4 - 1 8 .Unregulated 120/208-volt, 3-phase ac power from
4 - 2
the diesel generator van is supplied through J513on the power entrance box and is controlled bythe 200 ampere main circuit breaker. With themain circuit breaker in the ON position, unregu-lated primary ac power is applied to the dis-tribution box which contains the remainingcircuit breakers. Each circuit breaker is num-bered and labeled, denoting capacity and function.
4-19. Regulated Primary AC Power
4 - 2 0 .Regulated 12O-volt, 60-cps, single-phase ac oper-ating power for the exciters and receivers issupplied from the 10-kw power amplifier, 120-volt regulator (in the power amplifier van) tothe operations van through J505 on the signalline extension box. The 120-volt regulator limitsvariations in the required 120 vac to ±1%.Malfunctions in the 120-volt regulator will causeit to automatically apply unregulated ac powerfrom the power amplifier van to the exciters andreceivers and sound an alarm on the fault indi-cator. For a functional operation discussion ofthe regulated primary ac power circuit, refer toTM 11-5820-757-15.
4-21. Alarm and Monitoring
4 - 2 2 .Alarm and monitoring facilities for the opera-tions van, in addition to those provided in indi-vidual equipments, are contained in the alarm-monitor, power monitor, fault indicator, and chartrecorder.
4-23. Alarm-Monitor
4 - 2 4 .When a fault, such as a power failure or excessivebattery charge rate, occurs in the diesel genera-tor van, a voltage is applied to audible andvisual indicators in the alarm-monitor via thesignal cable and connector J10 of the audio andalarm box. Indicators provide an immediate in-dication regarding the location and type of trou-ble and also the status of equipment in the dieselgenerator van.
4-25. Power Monitor
4 - 2 6 .When primary ac power is applied to the powerdistribution panel, each phase of the primary acpower may be monitored with respect to neutralby FREQUENCY and VOLTAGE meters locatedon the front panel of the power monitor.
TM 11-5820-763-15
4-27. Fault Indicators
4 - 2 8
4-29. Chart Recorder
4-30
Two fault indicators continuously monitor theoperation of the exciters, receivers, and asso-ciated electronic equipment (via the signal lineextension box) in the power amplifier van. When
A combiner associated with each receiver suppliesvoltages which represent the signal levels presentin the receivers. The voltages are applied to therecorder control panel which selects the inputto the chart recorder. The chart recorder records
a fault occurs, the defective equipment activatesan audible and visual alarm on the fault indicator.
the voltages thereby providing a permanent rec-ord of receiver sensitivity.
Section II. FUNCTIONAL OPERATION OF ELECTRONIC CIRCUITS
4-31. GeneralThis section provides detailed theory of operationof the major circuits and panels comprising theoperations van. The schematic diagrams con-tained in chapter 6 of this manual will help youunderstand the detailed description given in thissection. Equipments (comprising the operationvan) not discussed in this section are coveredin separate technical manuals listed in appendixA to this manual.
4-32. Detailed Functioning
4-33 . Voice Frequency Channel Operation
4 - 3 4The operations van provides communications fa-cilities for either 72 or 68 telephone circuits.Each circuit may be wired for either 2-wire or4-wire operation depending on subscriber re-quirements. A typical voice frequency channelis shown in figure 4-1.
4-35. TransmittingVoice frequency signals from the subscriber arecross connected on the main distributing frame(MDF) to the input terminals of terminal board1A1TB1 in the multiplexer set. Voice frequencysignals from the 4-wire circuits are supplied tothe channel multiplexers where the signals aretranslated in a particular frequency within thebaseband spectrum. Voice frequency signals fromthe 2-wire circuits are supplied to 4-wire ter-minating assemblies which isolate the transmitsignals from the receive signals and supply thetransmit signals to the channel multiplexers wherethey are processed in the same manner as thesignals supplied from the 4-wire circuits.
4 - 3 6
The combined output signals (baseband) of the
multiplexer set are supplied from the outputterminals of terminal board 2A1TB3 to the base-band and order wire patch panel via the MDF.The baseband and order wire patch panel con-tains normal through jacks which connect thebaseband signals to the input of each exciter. Theexciters process the baseband signal for applica-tion to the power amplifiers in the power am-plifier van.
4-37. ReceivingBaseband signals from the receivers are routedthrough the baseband and order wire patch paneland MDF to the input terminals of terminalboard 4A1TB2 in the multiplexer set. The multi-plexer set demodulates the baseband signals pro-ducing 72 voice frequency channels. Signalswithin the voice frequency channels associatedwith the 4-wire circuits are routed from theoutput terminals of terminal board 1A1TB1through the MDF to the subscriber. Signals with-in the voice frequency channels associated withthe 2-wire circuits are routed through a 4-wireterminating assembly, terminals of terminalboard 1A1TB1, and the MDF to the subscriber.
4-38. Voice Frequency Telegraph Operation
4-39A voice frequency telegraph circuit utilizing atone keyer and tone converter is shown in figure 4-2. The voice frequency telegraph (VFTG)equipment provides facilities for 48 telegraph orteletypewriter channels. Since the operation ofall 48 channels is identical, only one channel isdiscussed in the following paragraphs. All valuesgiven in this discussion are approximate.
4-40. TransmittingMark and space dc pulses from the subscribertelegraph or teletypewriter equipment are cross
4-3
TM 11-5820-763-15
connected on main distributing frame (MDF)terminal boards TB1B and TB3B to the keyerinput terminals on TB1A of the VFTG equipment.The tone keyer is an oscillator with a normaloutput (center) frequency between 300 and 3000cps. Mark and space signals applied to the inputof the tone keyer produce a tone signal whosefrequency is shifted 42.5 cps above (mark) and42.5 cps below (space) the center frequency.The output tone signals of the 48 keyers arecombined to form 4 groups of 12 teletype signalseach. Each group of 12 teletype signals is routedfrom the output terminals of TB1A of the VFTGequipment through cross connections on the MDFto one channel input in the multiplexer set. In themultiplexer set, the voice channel containingthe 12 teletype signals is processed in the samemanner as those channels containing voice fre-quency signals (pars 4-35). 4 - 4 3 .
Figure 4-l. Voice Frequency Channel,Simplified Schematic Diagram.
(Located in back of manual.)
4-41. Receiving
Each voice frequency channel from the multi-plexer set containing telegraph or teletypewritertone signals is cross connected on the MDF toinput terminals on TB2A of the VFTG equipment.The tone signals are then supplied to the inputterminals of tone converters and are demodulated.The resultant signal of each tone converter isapplied to a balanced dc amplifier. The outputof the dc amplifier drives a polar relay producingmark and space dc pulses. The dc pulses arerouted from the output terminals on TB2A ofthe VFTG equipment and cross connected on theMDF to the subscriber.
4-42. Voice Frequency Order Wire ChannelOperation
The voice frequency order wire channel (fig. 4-3)provides intersite communications facilities formaintenance personnel.
Figure 4-2. Voice Frequency Telegraph Channel, Simplified Schematic Diagram.
4 - 4
4-44. Transmitting
Voice frequency signals applied to the handsetof the order wire telephone set are amplified andsupplied to terminals of terminal board 1A1TB2(TBB) and PAD jack 1A1J39. The signals ap-plied to terminal board 1A1TB2 (TBB) are
routed through terminals on MDF terminalboard TB2B to local order wire telephone sets.The signals applied to PAD jack 1A1J39 arerouted through the baseband and order wirepatch panel to input jacks 1A2J5 on the exciters.The exciters process the order wire signal forapplication to the power amplifiers in the poweramplifier van.
4-45.
4 - 4 9 .
Depressing the order wire telephone set SIGpushbutton switch opens the voice circuit andapplies a 2600-cps signal tone from the signaltone transmitter to the output terminals of ter-minal board 1A1TB2 (TBB) and PAD jack1A1J39. The 2600-cps signal tone follows thesame path as the voice signal: (para 4-44).
4-46. Receiving
Order wire signaling tones and voice frequencysignals from the receivers are routed throughthe baseband and order wire patch panel to orderwire telephone set AMP jack 1A1J38. Order wiresignaling tones and voice frequency signals fromlocal order wire telephone sets are routed throughterminals on MDF terminal board TB2B to theorder wire telephone set input terminals on1A1TB2 (TBB) . The voice frequency order wiresignals are amplified in the order wire tele-phone set and applied to an associated handsetor speaker. The signaling tones are converted inthe order wire telephone set signal tone receiverto 20 cps. The 20-cps signal actuates a buzzerwithin the order wire telephone set and, simul-taneously, closes an external signaling relaywhich applies the 20-cps signal to an externalbuzzer or bell via terminals of terminal board1A1TB1 (TBA) and MDF terminal board TB2B.
4-47. Alarm and Monitoring
4-48.Alarm-Monitor
The alarm-monitor (see fig. 6-3) contains alarmcircuits that indicate the status of the base power,the two diesel generators, and the power switch-board equipment in the diesel generator van.
TM 11-5820-763-15
4-50.When the battery charge rate for the 24-voltunit batteries associated with diesel generatornumber 1 in the diesel generator van is high,24 volts dc appears at terminal 1 of terminalboard TB1 and is applied to indicator lamp DS124V through fuse F1. Indicator lamp DS1 24VBATTERY CHARGE DC is connected to dcground in the diesel generator van through ter-minal 11 of terminal board TB1.
4-51.
When the battery charge rate for the 24-volt unitbatteries (associated with diesel generator num-ber 2 in the diesel generator van) is high, 24volts dc appears at terminal 2 of terminal boardTB1 and is applied to indicator lamp DS2 24VBATTERY CHARGE DC through fuse F2. In-dicator lamp DS2 24V BATTERY CHARGE DCis connected to dc ground in the diesel generatorvan through terminal 11 of terminal board TB1.
4 - 5 2 .
When the battery charge rate for the 120-voltstation batteries in the diesel generator van ishigh, 120 volts dc appears at terminal 3 of ter-minal board TB1 and is applied to indicator lampDS3 120V BATTERY CHARGE DC throughfuse F3. Indicator lamp DS3 120V BATTERYCHARGE DC is connected to dc ground in thediesel generator van through terminal 12 of ter-minal board TB1.
4 - 5 3 .
When generator number 1 in the diesel generatorvan is connected to the primary ac power dis-tribution system, 120 volts dc appears at ter-minal 6 of terminal board TB1 and is applied toindicator lamp DS4 GEN NO. 1 ON BUSSthrough fuse F4. Indicator lamp DS4 GEN NO.1 ON BUSS is connected to dc ground in the dieselgenerator van through terminal 12 of terminalboard TB1.
4 - 5 4 .
When generator number 2 in the diesel generatorvan is connected to the primary ac power dis-tribution system, 120 volts dc appears at ter-minal 8 of terminal board TB1 and is appliedto indicator lamp DS6 GEN NO. 2 ON BUSSis connected to dc ground in the diesel generatorvan through terminal 12 of terminal board TB1.
4-5
TM 11-5820-763-15
4 - 5 5
When 120/208-volt, 60-cycle, three-phase, basepower is connected to the primary ac powerdistribution system, 120 volts dc appears at ter-minal 7 of terminal board TB1 and is appliedto indicator lamp DS5 BASE ON BUSS throughfuse F5. Indicator lamp DS5 BASE ON BUSSis connected to dc ground in the diesel generatorvan through terminal 12 of terminal board TB1.
4 - 5 6
When base power is available at the diesel gen-erator van power distribution panel for applica-tion to the primary ac power distribution system,120-volt ac, 60-cycle, single-phase power appearsat terminal 4 of. terminal board TB1 and isapplied to indicator lamp DS7 BASE POWER ONLINE through fuse F7. Indicator lamp DS7 isconnected to neutral (ac ground) in the dieselgenerator van through terminal 5 of terminalboard TB1.
4 - 5 7 4-64
When generator number 1 in the diesel generatorvan is defective, 24 volts dc appears at terminal9 of terminal board TB1 and is applied to dieselnumber 1 alarm buzzer DS8 through fuse F8and the normally closed contacts of switch SlDIESEL NO. 1 ALARM. Throwing switch Slfrom its normal position (up) opens the switchcontacts and de-energizes the buzzer. Buzzer DS8is connected to dc ground in the diesel generatorvan through terminal 11 of terminal board TB1.
4 - 5 8
Operation of diesel number 2 alarm buzzer DS9,associated with generator number 2, is identicalto that described for diesel number 1 alarm buzzerDS8. The circuit components are fuse F9 andswitch S2 DIESEL NO. 2 ALARM.
4-59. Power Monitor
4 - 6 0
The power monitor (see fig. 6-1) provides ameans of monitoring the frequency and phase-to-neutral voltage of the 120/208-volt, 60-cps,three-phase, primary ac power applied to the op-erations van. POWER MONITOR switch S1 con-nects FREQUENCY meter Ml and VOLTAGE
4-66
Figure 4-3. Voice Frequency Order Wire Channel,Simplified Schematic Diagram.
(Located in back of manual.)
meter M2 between the phase to be monitored andneutral. when switch S1 is in the OFF positionboth meters are disconnected from the primaryvoltage.
4-61. Recorder Control
4 - 6 2
The recorder control panel contains two identicalcircuits (see fig. 6-4) which provide the meansof connecting any one of the four receivers to achannel input time constant for each channel in-put to the chart recorder.
4 - 6 3
Voltages representing the rf signal strengthlevels present in receivers 1 through 4 are ap-plied from the noise amplifiers of the receivers tojacks J1 through J4 on the recorder control panel.The dc signal strength level present in the com-biner of receiver 1 is applied to jack J5.
RECEIVER switches S3 and S4 on the recordercontrol panel select the signals to be supplied torecorder channel number 1 and recorder channelnumber 2 respectively. The selected signals arefed through terminal boards TB1 and TB2 to re-corder channel number 1 and recorder channelnumber 2. Variable resistors CAL CH 1 R1 andCAL CH 2 R3 are used to calibrate the input tothe chart recorder. TIME CONSTANT switchesS1 and S2 select the recording time constant foreach channel by inserting or removing capacitorsCl or C2.
4 - 6 5Setting TIME CONSTANT switches S1 and S2to the IN position selects a recording time con-stant of approximately 12 seconds for each re-corder channel. The long time constant tends tolimit large variations of short duration on thechart recorder. This permits observation of over-all variations in signal strength over long periodsof time (depending on chart speed). The TIMECONSTANT switches are normally set to the INposition when recording signal strength levels.
Setting TIME CONSTANT switches S1 and S2to the OUT position selects a fast time constant,determined by recorder ballistics, for each re-corder channel. The fast time constant permitsthe recorder to record large input variations of
4-6
short duration. The TIME CONSTANT switchesare normally usedfor test and calibration pro-cedures.
4-67. Patch Panel Operation
4-68. Baseband and Order Wire Patch Panel
4 - 6 9
The baseband and order wire patch panel illus-trated in Chapter 5, figure 5-1, is used for patch-ing and testing the baseband and order wire cir-cuits. With respect to baseband signal, it is elec-trically located between the multiplex equipmentand the baseband terminals of the exciters andreceivers; with respect to order wire signals, it iselectrically located between the order wire tele-phone set and the order wire terminals of theexciters and receivers.
4 - 7 0
The baseband and order wire patch panel pro-vides the following functions:
a. Connects the multiplexer output (baseband)exciters 1 and 2.
b. Connects the local and operations van ordersignals to exciters 1 and 2.
c. Connects the baseband and order wire out-puts of the four receivers to the demultiplexerequipment and order wire equipment respective-ly.
d. Test point for baseband and order wire sig-nal monitoring and troubleshooting.
4 - 7 1
A monitor jack is connected in parallel with eachlift jack to permit monitoring of the basebandand order wire signals without interrupting theassociated circuit. These jacks also permit patch-ing of their related equipment.
4 - 7 2
lift jacks are connected to the input or outof their related equipment and permit patch-
testing of the equipment. These jacks func-follows :
Inserting a dual plug (fig. 3-13) into theBB LIFT jacks will lift (remove from serv.
baseband signal of the associated receiverove the receiver baseband combiner from
the combiner buss (see fig 4-4).
TM 11-5820-763-15
NOTE
Inserting a dual plug into REC 1 BBLIFT jacks removes normal basebandamplifier number 1 output to the multi-plexer receiving equipment. To avoid an .interruption in service when using thesejacks, insert a patch cord between ei-ther REC 2 BB MON, REC 3 BB MONor REC 4 BB MON jacks and MUX INB B L I F T j a c k s .
b. Inserting a dual plug into the REC OWLIFT jacks will lift the order wire signal of theassociated receiver and remove the receiver orderwire combiner from the combiner buss (see fig.4 - 5 ) .
Inserting a dual plug into REC 1 OWLIFT jacks removes normal order wireamplifier number 1 output to the orderwire telephone equipment. To avoid aninterruption in service when using these jacks insert a patch cord between either
REC 2 OW MON, REC 3 OW MON, orREC 4 OW MON jacks and OW INL I F T j a c k s .
c. Inserting a dual plug into the EXC BBLIFT jacks will lift the baseband circuit of theassociated exciter and bridge 135 ohms acrossthe operating circuit thereby maintaining propercircuit impedances (see fig. 4-6).
d. Inserting a dual plug into the EXC OWLIFT jacks will lift the order wire circuit of theassociated exciter and bridge 600 ohms across theopened leads from the hybrid (see fig. 4-7).
4-73The MUX IN, MUX OUT, OW IN, and OW OUTjacks may be used for back-to-back tests of themultiplexing and order wire equipment. For per-formance of these tests refer to the applicableequipment technical manual listed in appendix Ato this manual.
NOTEUsing the lift jacks during operationwill remove the associated equipmentfrom the operating circuit.
4-74The baseband and order wire patch panel alsohouses two hybrid transformers mounted in con-nectors J31 and J32. These transformers match
4-7
TM 11-5820-763-15
Figure 4-4. Baseband Patching, Receiving.
the 600-ohm output impedance of the order wiretelephone set to the input impedance of each ex-citer.
4-75. Exciter Patch Panel
4-76The exciter patch panel (fig. 4-8) provides ameans of patching the rf output of the excitersto test equipment, a dummy load, or to the power
amplifiers located in the power amplifier van. Therf outputs of exciter 1 and exciter 2 are suppliedto connector EXCITER OUTPUT 1 and connectorEXCITER OUTPUT 2 on the exciter patch panel.A patch cable (W505) connects the rf output ofexciter 1 from EXCITER OUTPUT 1 to eitherEXCITER DUMMY LOAD 1 or PWR AMP. IN 1.A patch cable (W507) connects the rf output ofexciter 2 from EXCITER OUTPUT 2 to eitherEXCITER DUMMY LOAD 2 or PWR AMP. IN 2.
4-8
TM 11-5820-763-15
Figure 4-5. Order Wire Patching, Receiving.
4-9
TM 11-5820-763-15
Figure 4-7. Order Wire Patching, Transmitting.
4-10
TM 11-5820-763-15
Figure 4-8. Exciter Patch Panel.
Section Ill. FUNCTIONAL OPERATION OF MECHANlCAL ASSEMBLIES
4-77. General
This section contains a description of the func-tional operation of operations van mechanical as-semblies. For a description of the functional me-chanical operation of other equipment in the op-erations van, refer to the applicable equipment
technical manual listed in Appendix A to thismanual.
4-78. Air Brake System
4 - 7 9When the operations van air brake system (fig.4-9) is properly connected to the service brakesystem of the prime mover, the prime moverbrake pedal operates the brakes on both vehicles.The service brakes are of the air-over-hydraulictype, with automatic breakaway protection. Withthe air hose couplings connected to the primemover air system and the prime mover air shutoffcocks open, air fills the operations van air systemto a pressure equivalent to that of the primemover.
4-80. Brake Application
4-81
When the prime mover brake pedal is depressed,air pressure is directed through the service airline of the operations van to the emergency relayvalve. This valve causes compressed air to be re-leased from the air reservoir to the brake airchamber which is attached to the master cylinder.As the brake air chamber is pressurized, themotion of its diaphragm is transferred to themaster cylinder piston which in turn causes the
wheel cylinder pistons to move outward, forcingthe brakeshoes against the brakedrum.
4-82. Brake Release
4 - 8 3
When the prime mover brake pedal is released,a drop in pressure in the service air line of theoperations van causes the emergency relay valveto release the compressed air from the brake airchamber. This allows the brake mechanism andthe retracting springs in the brake air chamberto pull the brakeshoes away from the drum.
4-84. Air Hose Couplings
4 - 8 5
Air hose couplings are mounted on the front endsof the service and emergency air lines for con-necting the operations van air brake system tothe prime mover brake system. Another set of airhose couplings is provided at the rear of the opera-tions van for connecting the operations van brakesystem to vehicles towed in tandem. When theair hose couplings are not connected, they arefitted with dummy couplings to prevent foreignmatter from entering the system. Hooks are pro-vided to mount the dummy couplings when theyare not being used.
4-86. Air Cleaners
4 - 8 7
An air cleaner is connected into both the serviceand the emergency air lines to prevent moistureand foreign matter from entering the air brakesystem. Each air cleaner is provided with a drainplug and a replaceable filter element.
4-11
TM 11-5820-763-15
4-88. Air Reservoir
4 - 8 9
The air reservoir is a metal tank mounted in strapbrackets on the center rear of the chassis. It isconnected by an air line to the emergency relayvalve to operate the operations van brakes. It isfitted with a drain cock to drain accumulatedmoisture and to release the air pressure in thebrake system in the event of locked brakes, orwhen making repairs or adjustments on thebrakes.
4-90. Emergency Relay Valve
4-91
The emergency relay valve (fig. 4-10) is mountedunder the center rear of the operations van chas-sis. It speeds brake action by releasing air fromthe air reservoir directly to the brake air cham-ber. This eliminates loss of time that would re-sult in sufficient air for brake operation had totravel from the prime mover to the brake airchamber. In addition, this valve controls the airflow to and from the air reservoir, and in theevent of sudden loss of pressure in the emergencyline (such as the operations van breaking awayfrom the prime mover), automatically appliesthe brakes. The emergency relay valve is actuatedby changes in air pressure in the service air line.These changes in air pressure are in direct pro-portion to the pressure applied to the brake pedalof the prime mover.
4 - 9 2
The emergency relay valve body consists of twosections separated by a check valve diaphragmand a relay valve diaphragm, and connected bythree internal valves and a number of air pas-sages. Ports are provided for connections to theemergency air line, service air line, air reservoirand brake air chamber, and to exhaust compressedair used for brake applications.
4 - 9 3
To provide service brake application, air enter-ing the service air line inlet on top of the emer-gency relay valve flows down through a passageto the cavity on top of the relay valve diaphragm.Air pressure acting upon this diaphragm causes itand the plunger to move downward, closing theexhaust valve and opening the inlet valve. Thisallows air to flow from the air *reservoir to thebrake air chamber. A small port permits air to
4-12
reach the underside of the relay valve diaphragm.This equalizes the’ pressure on the diaphragm andholds the brake application in direct relation tothe pressure applied on the prime mover brakepedal.
4 - 9 4
Releasing the prime mover brake pedal lowersthe air pressure in the service air line, causing therelay valve diaphragm return spring and the airpressure under the relay valve diaphragm to liftthe diaphragm and plunger. This action closes theinlet valve and opens the exhaust valves, thus per-mitting the air in the brake air chamber to en-ter the emergency relay valve and flow up throughthe hollow plunger and out the exhaust port.Whether all the air is released, or to what extentthe brakes are applied, is determined by theamount of brake pedal application at the primemover.
4 - 9 5
To fill the air reservoir on the operations van, airfrom the prime mover flows through the emer-gency air line inlet port near the bottom of theemergency relay valve, up a passage on one side ofthis valve, through the normally open check valvein the upper portion, down another passage onthe other side of the emergency relay valve to acavity at the bottom, and out through a line ‘tothe air reservoir.
4 - 9 6
This roundabout passage of the air provides foroperating the emergency feature of the emergencyrelay valve. If anything should cause a pressuredrop-in the emergency air line, such as the opera-tions van breaking away from the prime mover,the emergency air hose coupling being detached,or a serious leak developing in the emergency airline, the air in the air reservoir flows back throughthe passage of the emergency relay valve. In sodoing, it closes the check valve at the top of theunit and applies pressure to the top of the checkvalve diaphragm. All diaphragms, connectinglinkage and valves are pressed downward, closingthe exhaust valve, opening the inlet valve and re-leasing air from the air reservoir to the brake airchamber to set the service brakes. The brakes maybe released after an emergency application byhooking up the emergency air hose coupling orby bleeding off the air through the air reservoirpetcock.
TM 11-5820-763-15
4-13
Figure 4-9. Operations Van Brake System.
TM 11-5820-763-15
Figure 4-10. Emergency Relay Valve.
4 - 1 4
TM 11-5820-763-15
4-97. Brake Air Chamber
4 - 9 8 .
4 - 1 0 3 .
4 - 1 0 4 .
4 - 9 9 .
4-105.
4 - 1 0 0 .
4 - 1 0 6 .
4-101. Master Cylinder
4-102.
4-107. Wheel Brake Mechanism
4-108.
4 - 1 5
TM 11-5820-763-15
Figure 4-11. Chamber and Master Cylinder
4-16
TM 11-5820-763-15
Figure 4-12. Wheel Brake Mechanism
4-17
TM 11-5820763-15
CHAPTER 5
MAINTENANCE
5-1. Introduction
Section I. PREVENTIVE MAINTENANCE
5-1.1. General
5 - 1 . 2
Table 5-0.1. Preventive Maintenance Routines
5-1.3. Power Monitor Meter Checks
5 - 1 . 4
5 - 1
TM 11-5820-763-15
5-1.5. Operations Van Power Turn-On andTurn-Off Procedure
5-1 .6
CAUTION
NOTE
NOTE
5-1.7. Winding and Setting Clock
5 - 1 . 8
5 - 2
TM 11-5820-763-15
5 - 1 . 9 . R a d i u s R o d A d j u s t m e n t
5 - 1 . 1 0
WARNING
Figure 5-0.1. Roadside Radius Rod Measurements.
5 - 3
TM 11-5820-763-15
Figure 5-0.2. Roadside Radius Rod.
5-1.11. Operation Van Leveling
5-1 .12
WARNING
5-1.13. Inspection and Cleaning of OperationsVan Interior
5-1.14. General Information
5 - 4
TM 11-5820-763-15
5-1.15. Materials Required
WARNING
5-1.16. Procedure
W A R N I N G
5 - 5
TM 11-5820-763-15
5-1.17. Operations Van Exterior Inspectionand Cleaning
5-1.18. General Information
5-1.23. Materials Required
5-1.19. Materials Required
WARNING
WARNING
5-1.24. Procedure
5-1.20. Procedure
WARNING
5-1.25. First Aid Kit Inspection
5 - 1 . 2 6
5-1.21. Pioneer Kit Inspection and Cleaning
5-1.22. General Information
5 - 6
TM 11-5820-763-15
5-1.32. General Information
5-1.33. Materials Required
5-1.27. Lantern and Flashlight Inspection
5 - 1 . 2 8
5-1.34. Procedure
5-1.35. Tire Inspection
5-1 .36
5-1.29. Fire Extinguisher Inspection
5 - 1 . 3 0 WARNING
5-1.31. Tarpaulin Inspection and Cleaning
5 - 7
TM 11-5820-763-15
5-1.37. Lubrication
5-1.38. General Information5-1.40. Procedure
WARNING
5-1.39. Materials Required
WARNING
5 - 8
Figure 5-0.3. Operations Van Forward LubricationPoints
TM 11-5820-763-15
5-1.41. Replacing Hydraulic Brake Fluid
5-1.42. General Information
5-1.43. Materials Required
5-1.44. Procedure
WARNING
Figure 5-0.4. Personnel Ladder Lubrication Points.
WARNING
Figure 5-0.5. Leveling Jack Screw
5-9
TM 11-5820-763-15
Figure 5-0.6. Master Cylinder
5-1.45. Air Brake System Moisture Drainage
5 - 1 . 4 6 .
5-1.47. Air Cleaners Inspection and Cleaning
5-1.48. General Information
5-1.49. Materials Required
5-1.50. Procedure
5-10
TM 11-5820-763-15
Figure 5-0.7. Air Brake System MoistureDrainage Points.
5-1.51. Air Brake System Inspector
5-1.52. General Information
5-11
TM 11-5820-763-15
Figure 5-0.8. Air Cleaners Inspection.
5-1.53. Materials Required
a. Prime mover.
b. One quart soap solution.
c. One brush.
5-1.54. Procedure
WARNING
Before performing this routine, insurethat both landing gear shoes are restingfirmly on the ground, crank handles onboth gear boxes are in the out position,and wheel chocking blocks are in place.
a. Connect prime movertions van brake system.
brake to opera-
b, Coat all air hoses, air hose fittings, and airhose couplings with soap solution.
c. Observe for presence of soap bubbles whichindicate air leakage. No leakage is permitted.Tighten fittings and couplings or replace partsas required.
d. Disconnect prime mover brake system fromoperations van brake system.
5-1.55. Bleeding Brakes
5-1.56. General Information
a. The purpose of this routine is to remove anyair that has accumulated in the operations vanbrake hydraulic system.
b. The approximate time required forformance of this routine is 30 minutes.
the per-
c. Two men are required to perform this rou-tine; one stationed in the cab at the prime moverand one man at the operations van.
5-1.57. Materials Required
a. Prime mover.
b. Clean l-quart glass jar.
c. One quart hydraulic brake fluid, FederalSpecification VV-F-451A.
d. Clean, dry, lint-free cloths.
e. Wrench, open-end, adjustable.
f. Bleeder tube.
g. Paragraph 5-1.41, Replenishing HydraulicBrake Fluid.
5-1.58. Procedure
WARNING
Before performing this routine, insurethat both landing gear shoes are restingfirmly on the ground, crank handles onboth gear boxes are in the out position,and wheel chocking blocks are in place.
a. Connect operationsmover brake system.
van brake system to prime
WARNING
Hydraulic brake fluid is harmful to theskin and eyes. Use extreme caution whenhandling this fluid.
b. Fill clean glass jar approximately threequarters full with hydraulic brake fluid.
5-12
c. Remove rubber cap from bleeder valve (fig.5-0.9). Clean bleeder valve and surrounding areawith a clean cloth.
d. Attach bleeder tube to bleeder valve and sub-merge other end of tube in hydraulic brake fluidcontained in glass jar.
e. Perform procedures given in paragraphs 5-1.41 through 5-1.44.
CAUTIONDo not pump the master cylinder dry.
f. While brake pedal on prime mover is beingpumped slowly up and down, openby turning valve counterclockwise.
bleeder valve
g. Observe flow of hydraulic brake fluid intojar. When bubbles cease, and stream is a cleansolid mass, close bleeder valve firmly.
h. Remove bleeder tube from bleeder valve andreplace rubber cap on valve.
i. Repeat procedure outlined in steps c throughh at other bleeder valve.
j. Disconnect prime mover brake system fromoperations van brake system.
5-1.59. Stop and Running Lights Inspection
TM 11-5820-763-15
5-1.60
The purpose of this routine is to determinewhether the operations van stop and runninglights are in operating condition. Two men arerequired to perform this routine ; one man sta-tioned in the cab of the prime mover and one manat the operations van. Proceed as follows :
a. Inspect stop and running lights for dam-aged or missing lenses.
b. Connect prime mover 24-volt electrical sys-tern to 24-volt dc input connector located on lowerfront wall of operations van.
c. Apply operations van brakes from primemover.
d. Observe stop lights located on rear of opera-tions van. Both stop lights should illuminate. Re-place lamp if necessary.
e. Release operations van brakes.f. Check operation of turn indicators.g. Check operation of black out lights.h. Turn on operations van running lights from
prime mover.i. Observe running lights located at upper four
corners of operations van. The running lightsshould illuminate. Replace lamps if necessary.
Figure 5-0.9. Bleeding Brakes.
5-13
TM 11-5820-763-15
j. Turn off operations van running lights and a. Inspect emergency lights for damaged or mis-disconnect prime mover 24-volt electrical system. sing lenses.
5-1.61. Emergency Lighting Inspection
5-1 .62 .
The purpose of this routine is to determinewhether the operations van 24-volt emergencylighting is in operating condition. Proceed as fol-lows :
b. Connect prime mover 24-volt electrical con-nector to 24-volt dc input connector located atlower front wall of operations van.
c. Turn on 24-volt emergency light switch lo-cated on the interior curbside wall of operationsvan. The three overhead emergency lights shouldilluminate. Replace lamps if necessary.
d. Disconnect prime mover 24-volt electricalconnector.
Section II. ORGANIZATIONAL/DEPOT MAINTENANCE
5-2. General 5 - 6 .
This section provides organizational/depot main-tenance instructions at an equipment level. Theseinstructions supplement the procedures containedin Section I. In performing organizational/depotmaintenance according to these instructions, re-ference should be made to the schematics con-tained in Chapter 6 and to the diagrams containedin TM 11-5820-763-25P.
5 - 8 .5-3. Test Equipment
Text
The test equipment required to perform the orga-nizational/depot maintenance instructions givenin this section is listed in table 5-1. The test equip-ment operating characteristics given are thosewhich are applicable to the testing of this equip-ment and do not necessarily represent the maxi-mum capabilities of the test equipment.
5-5. Performance Test Standards
Performance test standards for the operationsvan are covered in Section I, preventive mainte-nance. For performance test standards of indi-vidual equipments not covered therein, refer tothe applicable equipment technical manuals listedin Appendix A to this manual.
5-7. Test Points
Table 5-2 lists and describes all test points andpatch jacks for the operations van that are notdescribed in other technical publications. Alljacks are front panel mounted on the basebandand order wire patch panel and are illustrated infigure 5-l.
5-9. DC Voltage Requirements and Sources
5 - 1 0 .The dc voltage requirements and sources for theoperations van are listed in table 5-3.
Table 5-1. Test Equipment
Federal Stock No. Nomenclature
6626-724-8682 Multimeter AN/PSM-6( ) AC Voltage: 0 vac to 250 vacDC Voltage : 0 vdc to 50 vdc
0 vdc to 250 vdcDC Resistance: Zero ohms to 1,000 ohms
Name
CONV BAL
CONV UNBALEXC 1 BB LIFT
EXC 2 BB LIFT
Table 5-2. Test Points and Patch Jacks
RererenceDes ignat ion F u n c t i o n
J40,J41,J68,J59
J39,J60J54, J55
J56,J57
Provides three single plug outputs for double plug input
Provides three double plug outputs for single plug inputRemoves baseband input to exciter 1 and terminates baseband to exciter
1 in 135 ohms. Also provides baseband patching facilities for exciter 1Removes baseband input to exciter 2 and terminates baseband to exciter
2 in 135 ohms. Also provides baseband patching facilities for exciter 2
5 - 1 4
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
Table 5-2. Test Points and Patch Jacks - Continued
EXC 1 BB MONEXC 2 BB MONEXC 1 OW LIFT
EXC 2 OW LIFT
EXC 1 OW MONEXC 2 OW MONMULTIPLE BALMULTIPLE UNBALMUX IN BB LIFT
MUX OUT BB LIFT
MUX IN BB MON
MUX OUT BB MON
OW IN LIFT
OW OUT LIFT
OW IN MON
OW OUT MON
REC 1 BB LIFT
REC 2 BB LIFT
REC 8 BB LIFT
REC 4 BB LIFT
REC 1 BB MONREC 2 BB MOM
REC 3 BB MONREC 4 BB MONREC 1 OW LIFT
REC 2 OW LIFT
REC 3 OW LIFT
REC 4 OW LIFT
REC 1 OW MONREC 2 OW MON
REC 3 OW MON
REC 4 OW MON
J35,J36J37,J38J92,J93
J94, J95
J73,J74J75,J76J77,J78,J96,J96,J97J79,J98J61,J62
J52,J53
J42,J43
J33,J34
J99, Jl00
J90, J91
J80,J81
J71,J72
J63,J64
J65, J66
J67,J68
J69,J70
J44, J45J46, J47
J48, J49J50, J51J101, J102
JlO3,J104
J105,J106
J107,J108
J82, J83J84, J85
J85,J87
J88,J89
Provides baseband monitoring and patching facilities for exciter 1Provides baseband monitoring and patching facilities for exciter 2Removes order wire input to exciter 1 and terminates order wire to ex-
citer 1 in 600 ohms. Also provides order wire patching facilities forexciter 1
Remove8 order wire input to exciter 2 and terminates order wire toexciter 2 in 600 ohms. Also provides order wire patching facilities forexciter 2
Provides order wire monitoring and patching facilities for exciter 1Provides order wire monitoring and patching facilities for exciter 2Provides double plug outputs for a single plug inputProvides single plug outputs for a double plug inputRemoves baseband input to muitiplex receiving equipment, Also provides.
baseband patching facilities for receiversRemoves baseband input to exciters. Also provides baseband patching
facilities for excitersProvides facilities for monitoring baseband output to multiplex receiving
equipmentProvides facilities for monitoring baseband output of multiplex trans-
mitting equipmentRemoves order wire input to order wire equipment. Also provides. order
wire patching facilities for receiversRemoves order wire input to exciters. Also provides order wire patching
facilities for excitersProvides monitoring facilities for order wire input to order wire equip-
mentProvides monitoring facilities for order wire output of order wire equip-
mentRemoves receiver 1 baseband output to multiplex receiving equipment. Al-
so removes baseband combiner 1 in receiver 1 from combiner bussProvides patching facilities for baseband output of receiver 2. Also re-
moves baseband combiner 2 in receiver 2 from combiner bussProvides patching facilities for baseband output of receiver 3. Also re-
moves baseband combiner 3 in receiver 3 from combiner bussProvides patching facilities for baseband output of receiver 4. Also
removes baseband combiner 4 in receiver 4 from combiner bussProvides monitoring facilities for receiver 1 baseband outputProvides monitoring and patching facilities for receiver 2 baseband
outputProvides monitoring and patching facilities for receiver 3 baseband outputProvides monitoring and patching facilities for receiver 4 baseband outputRemoves receiver 1 order wire output to order wire equipment. Also re-
moves order wire combiner 1 in receiver 1 from combine bussProvides patching facilities for order wire output of receiver 2. Also
removes order wire combiner 2 in receiver 2 from combiner bussProvides patching facilities for order wire output of receiver 3. Also re-
moves order wire combiner 3 in receiver 3 from combiner bussProvides patching facilities for order wire output of receiver 4. Also
removes order wire combiner 4 in receiver 4 from combiner bussProvides monitoring facilities for receiver 1 order wire outputProvides monitoring and patching facilities for receiver 2 order wire out-
putProvides monitoring and patching facilities for receiver 3 order wire Out-
putProvides monitoring and patching facilities for receiver 4 order output
5-15
TM 11-5820-763-15
Figure 5-l. Baseband and Order Wire Patch Panel.
Table 5-3. DC Voltage Requirements and Sources
5-11. Preventive Maintenance
5 - 1 2 .
Routine maintenance procedures that will helpprevent troubles which would interfere with theperformance of the operations van equipment arecontained in Section I.
5-13. Troubleshooting
5 - 1 4 .
Tables 5-4 and 5-5 contain troubleshooting in-formation for locating and correcting some of thetroubles which may develop in the operations van.
5 - 1 5 .
These tables cannot cover all possible troubles anddeficiencies that may occur under the many con-ditions of operation. If a specific trouble is notcovered, isolate the assembly in which the troubleoccurred and then locate the defective componentusing conventional troubleshooting techniques.
5-16. Alignment or Adjustment
5 - 1 7 .
No electrical alignment or adjustment of the op-erations van is necessary other than that con-
5 - 1 6
tained in Section I and in the technical manualscovering individual equipments comprising theoperations van. A list of applicable equipmenttechnical manuals is contained in Appendix A tothis manual.
5 - 1 8 .
Alignment or adjustment of operations van me-chanical assemblies after repair and/or replace-ment is covered in paragraphs 5-22 through 5-64.
5-19. Operations Van Electrical andElectronic Maintenance
5 - 2 0 .Electrical and electronic maintenance of the op-erations van consists of insuring that all equip-ment comprising the van is functioning properly.Proper operation of individual equipments in theoperations van will be insured by observing themaintenance procedures contained in the as-sociated technical manuals listed in Appendix Ato this manual. Electrical and electronic mainte-nance of the remaining equipment is limited toremoval and replacement of components.
5-21. Operations Van MechanicalMaintenance
5 - 2 2 .When mechanical maintenance requires the re-moval or replacement of components, refer to theapplicable assembly breakdown illustrated in TMll-5820-763-25P along with the removal and in-stallation procedures given in the following para-graphs.
WARNINGBefore performing maintenance on theoperations van exterior, insure that bothlanding gear shoes are resting firmlyon the ground, crank handles on bothgear boxes are in the “out” position,and wheel chocking blocks are in place.
5-23. Removal and Rep!acement of Tires andWheels
The nuts on the curbside wheels markedR have right-hand threads; the nuts onthe roadside wheels marked L have left.hand threads. The nuts are loosened byturning them in the opposite directionfrom the normal rotation of the wheel.
Refer to the Axle Assembly and Suspension As-sembly figures in TM 11-5820-763-25P when per-forming the following procedures.
5-25. Removal of Wheel From Hub
b. Using the leveling jacks, raise operationsvan until tires clear the ground.
c. Remove outer wheel hexagon nuts and thenremove outer wheel from hub.
The wheels of the operations van are removedfrom the hub as follows :
d. Remove inner wheel square cap nuts andthen remove inner wheel from hub.
TM 11-5820-763-15
a. Using the wheel nut wrench, loosen six outerwheel hexagon nuts and six inner wheel squarecap nuts.
NOTE
5-24.
5-17
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
Table 5-4. Primary AC Power, Troubleshooting Chart
1. No indication on FREQUENCY meterand/or VOLTAGE meter of powermonitor
2. Overhead light(s) inoperative
3. Air conditioner(s) inoperative
4. Equipment connected to convenienceoutlet(s) inoperative
5. Alarm-monitor DS1 24 V BATTERYCHARGE DC and/or DS2 24 V BAT-TERY CHARGE DC indicator lampsfail to light when unit batteries indiesel generator van are Charging
6. Alarm-monitor DS3 l20V BATTERYCRARGE DC indicator lamp fails to
Possible Cause
1a. Defective power cable and/or connec-tions between diesel generator vanand operations van
1b. Main circuit breaker or connectionsd e f e c t i v e
1c. POWER MONITOR switch, FRE-QUENCY meter, VOLTAGE meteror internal wiring defective
2a.2b.
2c.3a.
3b.
4b.
Burned out bulb(s)VAN LIGHTS circuit breakers or
connections defectiveLight switches or sockets defectiveAIR COND NO 1 or AIR COND NO 2
circuit breakers defectiveDefective connecting cables and/or
connectorsDefective air conditionerAssociated circuit breaker on dis-
tribution box defectiveDefective connecting cables and/or
convenience outlet
Equipment connected to convenienceoutlet defective
5a. Lamps defective5b. Fuse F1 and/or F2 defective5c. Interconnecting cabling to diesel gen-
erator van defective
5d. Unit batteries in diesel generatorvan not charging
6a. Lamp defective6b. Fuse F3 defective
Recommended Correction
1a. Check power entrance cable and con-nectors (see fig. 6-l). Repair or re-place as necessary
1b. Repair or replace as necessary.
1c. De-energize equipment and make con-tinuity tests of power monitor. Re-pair or replacecomponents asnecessary
2a. Replace bulb(s)2b. Repair or replace as necessary
2c. Repair or replace as necessary3a. Repair or replace as necessary
3b. Check cables and connectors (see fig.6 - l )
3c. Refer to equipment technical manual4a. Repair or replace as necessary
4b. Using multimeter, check for presenceof 120 volts ac at convenience outlet.If 120 volts ac is not present, de-energize equipment and make con-tinuity check. Repair or replacedefective components
4c. Refer to applicable equipment techni- cal manual
5a. Replace lamps5 b . R e p l a c e f u s e ( s ) 5C. Using multimeter, check for the
presence of +24 volts dc between ter-minals 1 and 11 on TB1. If 24 voltsdc is not present, check intercon-necting cabling to diesel generatorvan (see fig. 6-3)
5d. Refer to diesel generator van technicalmanual for corrective maintenance
6a. Replace lamp6b. Replace fuse
Table 5-4. Primary AC Power, Troubleshooting Chart (cont)
light when station batteries in dieselgenerator van are charging
7. Alarm-monitor DS4 GEN NO. 1 ONBUSS or DS6 GEN NO. 2 ON BUSSindicator lamp fails to light when theassociated generator in the dieselgenerator van is supplying primary
ac power to the operations van
8. Alarm-monitor DS5 BASE ON BUSSindicator lamp fails to light when basepower is supplied from the dieselgenerator van to the operations van
9. Alarm-monitor DS7 BASE POWER ONLINE indicator lamp fails to lightwhen base power supplied to the die-sel generator van is in standby status
6d.
7a.7b.7c.
7d.
8a.8b.8c.
9d.
Interconnecting cabling to diesel gen-erator van defective
Station batteries in diesel generatorvan not charging
Lamps defectiveFuse F4 or F6 defectiveInterconnecting cabling to diesel gen-
erator van defective
Generator not connected to primarybuss
Lamp defectiveFuse F5 defectiveInterconnecting cabling to diesel gen-
erator van defective
Base power not connected to primarypower buss
Lamp defectiveFuse F7 defectiveInterconnecting cabling to diesel gen-
erator van defective
Base power not available
Recommended Correction
6c. Using multimeter, check for thepresence of +120 volts dc betweenterminals 3 and 12 on TB1. If 120volts dc is not present, check inter-connecting cable to diesel generatorvan for damage (see fig. 6-3)
6d. Refer to diesel generator van techni-cal manual for corrective mainten-ance
7a. Replace lamps7b. Replace fuss7c. Using multimeter, check for the
presence of +120 volts dc betweenterminals 6 and 12 or 8 and 12 onTB1. If 120 volts dc is not present,check interconnecting cabling todiesel generator van (see fig. 6-3)
7d. Refer to diesel generator van technicalmanual for corrective maintenance
8a. Replace lamp8b. Replace fuse8c. Using multimeter, check for the
presence of +120 volts dc betweenterminals 7 and 12 of TB1. If 120volts dc is not present, check inter-connecting cabling to diesel genera-tor van (see fig. 6-3)
8d. Refer to diesel generator van technicalmanual for corrective maintenance
9a. Replace lamp9b. Replace fuse9c. Using multimeter, check for the
presence of 120-volt ac, 60-cycle,single-phase voltage between termi-nals 4 and 11 on TB1. If 120 volts acis not present, check interconnectingcabling to diesel generator van (seefig. 6-3)
9d. Refer to diesel generator van technicalmanual for corrective maintenance5-19
TM 11-5820-763-1510. Alarm-monitor buzzer DS8 or DS9
fails to operate when the generatorsupplying primary ac power to theoperations van is defective.
10a. Fuse F8 or F9 defective10b. S1 DIESEL NO. 1 ALARM or S2
DIESEL NO. 2 ALARM switchesdefective
10c. Buzzer defective
Table 5-5. Mechanical and 24-Volt DC, Troubleshooting Chart
1. Brakes will not release
2. No brakes or weak brakes
10a. Replace fuse10b. Using multimeter, check for the
presence of +24 volts dc betweenterminal of switch S1 and S2 orterminal 11 on TB1. If 24 volts dcis not present, check interconnect-ing cabling to diesel generator van(see fig. 6-3)
1Oc. Replace buzzer
Possible Cause
la .
1b.
1c.
1d.
1e.1f.
2a.2b.
2c.2d.
2e.2f.
Emergency relay valve in appliedposition
Intervehicular air hose couplings im-properly connected to prime mover
Operations van brake control in primemover is in applied position
Restriction in air service and emer-gency line tubes, air tubes, or in-ter-vehicular air hose
Shut off valves closed on prime moverWeak or broken brakeshoe return
springShut off valves closed on-prime moverIntervehicular air hose improperly
connected to prime moverAir reservoir drain cock openLow air pressure
Defective emergency relay valveClogged air cleaner
Recommended Correction
1a. If operations van brake system is notcoupled to prime mover, open draincock on air reservoir. If operationsvan is coupled to prime mover,pressurize brake system
1b. Insure that couplings are secure
1c. Move brake control to release posi-tion
1d. Check all tubes and the hose for re-strictions
1e. Open valves1f. Replace spring (para 5-54)
2a. Open valves2b. Insure that couplings are secure
2c. Close drain cock (fig. 3-1)2d. Check air pressure of prime mover;
check for restriction of air, checkfor air leakage. (Refer to preven-tive maintenance, para 5-1.1.)
2e. Make leakage test (para 5-47)2f. Clean or replace filter element.
(Refer to preventive maintenancep a r a 5 - 1 . 1 . )
5-20
Table 5-5. Mechanical and 24-Volt DC, Troubleshooting Cart (cont)
3. Landing gear crank handle difficult toturn
4. Operations van not tracking properly
5. All 24-volt dc lights inoperative
6. One or more 24-volt dc lights inopera-t ive
7. Dim or flickering 24-volt dc lamps
Possible Cause
2h.
2i.
2j.2k.3a.
3b.
3c.3d.4a.
4b.5a.
5b.
5c.
5d.
6d.
7a.7b.
7c.
Air in hydraulic brake system
Leaks in hydraulic system
Grease or brake fluid on brake lining
Worn brake liningWorn-out brake liningLack of lubrication or improper lubri-
cant on landing gear
Bent landing gear crankshaft or bevelgear shaft
Bent or dented landing gear lower legDamaged landing gear bearingsAxle misaligned
Broken spring leafIntervehicular cable not properly
plugged into 24-volt input receptacleDirty or corroded contacts on 24-volt
dc input receptacle or on plug ofintervehicular cable
24V DC EMERGENCY LIGHT switchdefective
No current from prime mover
Burned out lamp(s)Dirty or corroded lamp socketDirty or corroded contact in receptacle
or on plug of intervehicular cableBroken, grounded, or shorted cable,
or loose connectorsDefective lamp(s)Dirty or corroded lamp socket or
cable connectionsLoose or poor ground
Recommended Correction
2h.
2i.
2j.2k.3a.
3b.
3c.3d.4a.
4b.5a.
5b.
5c.
5d.
6a.6b.6c.
6d.
7b.
5-21
7c.
Bleed hydraulic brake system.(Refer to preventive maintenance,p a r a 5 - 1 . 5 5 . )
Tighten loose connectors; replacedamaged tubing or connectors
Replace brake lining (para 5-33);check oil seal and replace if neces-sary (para 5-32)
Adjust brakes (para 5-37)Replace brake linings (para 5-33)Lubricate landing gear (para 5-l.37)
Replace defective item (para 5-63)
Replace leg (para 5-63)Replace bearings (para 5-63)Adjust roadside radius rod. (Refer to
preventive maintenance Para 5-19.Replace spring leaf (para 5-54)Pull out plug of intervehicular cable,
and insert fully into receptacleClean as necessary
Repair or replace light switch asnecessary
Check prime mover circuit breakersand wiring
Replace lamp(s)Remove lamp and clean contactsClean as necessary
Check cables and replace as neces-sary; tighten loose connectors
Replace lamp(s)Clean as necessary
Clean and tighten terminals on groundwire at rear of 24-volt dc input re-ceptacle
TM 11-5820-763-15
5-26. Removal of Tire from WheelRemove the tire from wheel as follows:
a. Remove wheel from hub (para 5-25).b. Deflate tire by unscrewing tube valve with
the valve cap and removing valve.c. Place small end of a tire tool in slot be-
tween split ring and wheel rim, and pry splitring from its groove in wheel rim.
d. Turn wheel over and place it on blocks sothat it is raised approximately 6 inches abovethe ground.
e. Force tube valve stem into tire through stemslot in wheel rim.
f. Stand on casing to force tire off rim.
g. Remove tire flap and tube from tire.
h. Wash wheel thoroughly with clean water andallow wheel to dry.
i. Inspect mounting stud holes for excessivewear.
j. Check wheel and split ring for evidence ofdistortion.
k. Check condition of paint and repaint as nec-essary.
5-27. Replacement of Tire on WheelReplace the tire on wheel as follows :
a. Put tube into tire and insert flap.
b. Place wheel on blocks sufficiently high toraise rim an inch or more off the ground.
c. Lower tire onto wheel with valve stemaligned with stem slot in wheel rim.
d. Stand on tire to force it on rim.
e. Position split ring on wheel and start endunder rim.
f. As a portion of ring goes into place, standon this position and stamp ring progressively intoplace.
g. Inflate tire slightly and pound casing allaround to make tube fit smoothly inside casing.
h. Inflate tire to approximately 50 psi.
5-28. Replacement of Wheels on HubInstall wheel on hub as follows :
a. Position inner wheel on six mounting studs.
tightness.
d. Position outer wheel over inner wheelnuts, insuring that valve stem of outer wheel isnot aligned with valve stem of inner wheel.
e. Install the six outer wheel hexagon nuts andhand tighten.
f. Using the wheel nut wrench, alternatelytighten nuts on opposite sides to insure uniformtightness.
g. Lower operations van until tires touch theground.
h. Recheck nuts to make certain they are tight.
5-29. Removal and Replacement of Hub andWheel Brake Mechanism
WARNINGBefore performing the following proce-dures, release the air pressure from airbrake system by opening the air reser-voir drain cock
5-30Refer to the Axle Assembly figure in TM 11-5820-763-25P when performing the followingprocedures.
5-31. Removal and Disassembly of Hub andBrakedrum
Remove the hub and brakedrum from axle as fol-lows :
a. Remove wheels from hub (para 5-25).
b. Remove the six screws and lockwasherssecuring hubcap to hub, and remove the hubcapand gasket.
c. With a screwdriver or chisel, lift bentoverportion of washer to release outer bearing ad-justing nut.
d. Remove outer bearing adjusting nut, usingwheel bearing adjusting nut wrench.
e. Slide off washer, remove inner bearing ad-justing nut and slide off thrust washer.
f. To loosen hub and drum assembly, rockslightly on axle spindle. Remove outer bearing cone.
5-22
g. Pull hub and drum assembly from axle andremove oil seal and inner bearing cone.
h. Remove the 10 nuts and lockwashers fromwhich fasten brakedrum to adapter. Lift offinspection hole cover.
i. Separate adapter from hub.
j. Press or drive out the six serrated wheelmounting studs from hub using a hammer and ablock of wood.
k. Inspect bearing cups, oil seal and wiper forcracks, chipped spots, or wear. Insure that bearingcups fit tightly into hub. If inspection reveals re-placement is necessary, proceed as follows :
NOTEDo not remove bearing cups or wipersfrom hub unless inspection indicates re-placement is necessary.(1) With end of hub placed on blocks, drive
out bearing cup and wiper with a hammer and abrass drift or a block of wood.
(2) Turn hub over and drive out other bear-ing cup and wiper as in step (1).
WARNINGProlonged contact of skin with, clean- ing solvent or inhalation of fumes isdangerous. Adequate ventilation must beprovided.
CAUTIONDo not dry or spin bearings with com-pressed air.
l. Clean all metal parts with cleaning solventand dry parts thoroughly. Inspect each part care-fully for cracks, pitting, excessive wear or otherindications of damage. Replace faulty parts.
m. Check diameter of the brakedrum surfacewith a caliper. If the diameter of the braking sur-face is greater than 16.625 inches, replace thebrakedrum as described in paragraph 5-35.
NOTEFor normal operation, bearings shouldbe lubricated at 12,000 miles or at an-
nual intervals, whichever occurs first.n. Pack bearings by hand or with a mechanicalring packer, using Automotive LubricatingSpecification VV-6-632 or equiva-
lent. Force the lubricant between rollers and coneto insure sufficient lubrication.
TM 11-5820-763-15
5-32. Removal and Disassembly of BrakeMechanism
Remove brake mechanism from axle and disas-semble as follows :
a. Remove hub and brakedrum from axle (para5-31).
b. Remove the four retracting springs, the shoeguide bolt, lockwashers, and shoe guide washerattaching each brakeshoe.
C A U T I O NIn removing the brakeshoe, use care todisengage shoe from slot in wheel cylin-der push rod without drawing push rodout of wheel cylinder.
c. Disengage each brakeshoe from wheel cylin-der push rods.
CAUTIONDo not allow brake fluid to come in con-tact with brake lining either by drippingor from soiled hands.
d. Disconnect cylinder tube assembly from eachwheel cylinder at rear of backing plate.
e. Remove two hex-head screws and lockwash-ers holding wheel cylinder to backing plate as-sembly, and lift off wheel cylinder and sparkshield.
f. Pull out anchor pin.
g. Rack off adjusting stud until adjusting wheelcan be removed.
h. Remove retaining ring from end of adjust-ing stud.
i. Tap out worm sleeves, worms, O-rings, andadjusting studs, taking care not to misplace smallitems.
WARNINGProlonged contact of skin with cleaningsolvent or inhalation of fumes is danger-ous. Adequate ventilation must be pro-vided.
j. Clean all metal parts removed from brakemechanism with cleaning solvent and dry partsthoroughly. Visually inspect all parts for cracks,distortion, or other damage. Replace any faultyparts.
k. Inspect brakeshoe linings for wear. If brak-ing surface is worn nearly to attaching hardware,replace linings (pars 5-33).
5 - 2 3
TM 11-5820-763-15
5-33. Relining BrakeshoesReline brakeshoes as follows :
a. Remove brakeshoes (para 5-32).WARNING
Prolonged contact of skin with cleaningsolvent or inhalation of fumes is danger-ous. Adequate ventilation must be pro-vided.
b. Remove attaching hardware and linings fromeach brakeshoe and clean brakeshoe face thor-oughly with solvent.
NOTEIf brakedrums have been machined, in-stall shims (the thickness of metal re-moved between brakeshoes and lining).
c. Place new linings on each brakeshoe, align-ing the bolts with the holes in the brakeshoes.
d. Secure lining to brakeshoe with nuts, in-suring that lining is in contact with brakeshoesurface at all points.
5-34. Assembly and Replacement of BrakeMechanism on Axle
Assemble and install brake mechanism on axleas follows :
a. Slide O-ring into groove on adjusting studand install adjusting stud, worm, worm sleeve,washer and retaining ring in backing plate.
b. Place adjusting wheel in slot in backing plateand engage adjusting screw.
c. Turn adjusting stud until adjusting screw isstarted in backing plate.
d. Install anchor pins in backing plate.
e. Using the ten screws and self-locking nuts,attach backing plate assembly and dust shield toaxle flange.
f. Position each wheel cylinder and spark shieldon backing plate assembly. Working from rear ofdust shield, secure with two screws and lockwash-ers.
g. Connect cylinder connection tube to wheelcylinders.
h. Install each brakeshoe with lining, makingcertain that notched end of shoe is properly en-gaged with notch in wheel cylinder push rod.
i. Attach each brakeshoe to the backing plate
assembly with shoe guide bolt, shoe guide washer,and lockwasher.
j. Install four retracting springs.
k. Install hub and brakedrum assembly (para5-35).
l. Adjust brakes (para 5-37).m. Bleed brake system. (para 5-1.55).n. Install wheels (para 5-28).
5-35. Assembly and Replacement of Hub andBrakedrum on Axle
Assemble and install the hub and brakedrum onthe axle as follows :
a. If bearing cups have been removed (para5-31), place hub on solid surface, position bearingcup seat with large end of tapered bore up andcarefully tap bearing cup until it is securely seatedin place.
b. Position inner bearing cone inside bearingcup and press or carefully tap oil seal and wiperinto place, using a block of wood. Do not hammerdirectly on seal.
c. Attach adapter to hub with six serratedwheel studs, and position brakedrum on adapter.
d. Install the inspection hole cover on brake-drum and secure with a serrated bolt, nut, andlockwasher.
e. Secure brakedrum adapter with the remain-ing 9 serrated bolts, nuts, and lockwashers.
WARNINGProlonged contact of skin with cleaningsolvent or inhalation of fumes is danger-ous. Adequate ventilation must be pro-vided.
f. Wash spindle with cleaning solvent (Fed-eral Spec P-S-661) and dry.
g. Apply thin coating (not over l/16-inchthick) of lubricant to inside surface of hub andoutside of axle spindle.
h. Slide hub on axle being careful not to dam-age oil seal.
i. Position outer bearing cone in cup of huband install thrust washer and inner bearing ad-justing nut.
j. Adjust bearings (para 5-36).
k. Replace gasket and hubcap. Secure to hubwith six screws and lockwashers.
5 - 2 4
l. Adjust brakes (para 5-37).
m. Bleed brake system (para 5-1.55).
n. Install wheels (para 5-28).
5-36. Bearing AdjustmentAdjust bearings as follows:
a. Remove the six screws and lockwasherssecuring hubcap to hub and remove hubcap andgasket.
b. With screwdriver or chisel, lift bent-overportion of outer bearing adjusting nut washerand remove washer and nut.
NOTEWheels do not have to be removed toadjust bearings.
c. While rotating the brakedrum tighten innerbearing adjusting nut with wheel bearing adjust-ing nut wrench until hub binds on spindle.Back off approximately one-eighth of a turn.
d. Check adjustment by grasping brakedrumand attempting to rock on spindle. If bearings
movement of brakedrumof backing p1ate will be
rakedrum turning freely.If axial movement is excessive (more than l/32in.), further adjustment is required.
e. Slide outer bearing adjusting nut washerover spindle, install outer bearing adjusting nut,and tighten against washer. Bend flanges ofwasher over nut to prevent loosening.
f, Install hubcap and gasket. Secure with sixlockwashers and screws.
5-37. Brake AdjustmentAdjust brakes as follows :
CAUTIONDo not adjust brakes when brakedrumsare hot. Always check wheel bearingadjustment (para 5-36) before adjust-ing brakes.
a. Remove wheel from hub (para 5-25).
b. Remove hex nut which holds cover on in-ion hole in brakedrum and remove cover.
c. Rotate brakedrum until inspection hole isaligned with brake adjusting stud.
d. Invert a 0.010-inch feeler gage between
TM 11-5820-763-15
brakedrum and brake lining. Turn adjusting studuntil a slight drag on feeler gage is obtained.
e. Install inspection hole cover with hex nut.f. Install wheel on hub (para 5-28).
g. Repeat steps a through f on other wheel.
5-38. Brake Hydraulic System
5-39Refer to the Brake Installation figure in TM11-5820-763-25P when performing the followingprocedures.
5-40. Removal of Master CylinderTo remove master cylinder proceed as follows :
a. Release air pressure from system by openingdrain cock on air reservoir.
b. Disconnect master cylinder-to-tee flexiblehose from rear of cylinder.
c. Remove three nuts and lockwashers whichattach master cylinder to bracket and brake airchamber.
d. While holding air chamber, move mastercylinder to the left enough to detach rubberboot. Remove master cylinder.
5-41. Replacement of Master CylinderInstall master cylinder as follows :
a. Position master cylinder over the threestuds and against bracket, insuring that brakeair chamber push rod is properly seated in mas-ter cylinder position.
b., Install rubber boot over lip on master cyl-inder bore.
c. Secure master cylinder in place with threenuts and lockwashers, and connect master cyl-inder-to-tee hose to rear of master cylinder.
d. Close drain cock on air reservoir.e. Fill master cylinder. with hydraulic brake
fluid. Refer to paragraph 5-1.37 for lubricationprocedures.
f. Check brake air chamber push rod travel(para 5-45).
5-42. Brake Air System
5 - 4 3Refer to the Brake Installation figure in TM11-5820-763-25P when performing the followingprocedures.
5-25
TM 11-5820-763-15
5-44. Removal of Brake Air ChamberRemove brake air chamber as follows:
a. Release air pressure from system by open-ing drain cock on air reservoir.
b. Disconnect air chamber-to-emergency relayvalve tube.
C. Remove three hex nuts and lockwashersattaching brake air chamber to master cylinderand blacket.
d. While holding master cylinder in position,pull brake air chamber from it, being carefulnot to damage rubber boot while separating theassemblies.
5-45. Replacement of Brake Air ChamberTo replace brake air chamber p r o c e e d as follows:
a. Carefully insert brake air chamber pushrod into master cylinder and install rubber bootover lip on master cylinder.
b. Using three hex nuts and lockwashers, se-cure brake air chamber to master cylinder andbracket.
c. Connect air chamber-to-emergency relayvalve tube.
d. Close drain cock on air reservoir and con-nect air hose couplings to prime mover.
e. With prime mover brakes released, inserta small rod as far as possible through one oftwo inspection holes on roadside of brake airchamber. Mark on the rod the depth of penetra-tion.
f. Apply prime mover brakes and again markrod penetration.
g. Measure the distance between the twomarks. This measurement indicates the amountof push rod travel and should be a minimum of1/2 inch and a maximum of 7/8 inch.
CAUTIQNInsufficient brake air chamber push rodtravelc a pwill result in ineffective brakes. If nec-essary, adjust brakes as described inparagraph 5-37.
b. Disconnect air chamber-to-emergency relayvalve tube, air filter-to-emergency relay valvetube and air reservoir-to-emergency relay valvetube at the emergency relay valve.
c. Remove two hex head screws, lockwashers,and nuts attaching emergency relay valve tobracket and lift off valve.
5-47. Replacement of Emergency Relay ValveReplace emergency relay valve as follows:
a. Position emergency relay valve againstbracket and secure with two hex head screws,lockwashers, and nuts.
b. Connect air reservoir-to-emergency relayvalve tube, air filter-to-emergency relay valvetube, and air chamber-to-emergency relay valvetube to emergency relay valve.
c. Close drain cock on air reservoir and con-nect air hose couplings to prime mover.
d. With air brake system connected and pres-surized, apply soap solution to flanges of theemergency relay valve and to nuts which securethe various tubes to the valve.
e. If bubbles appear, tighten all nuts on flan-ges and tubes.
NOTELeakage in steps e through h should notexceed 1-inch soap bubbles in approxi-mately 3 seconds. If excess leakage isfound, replace emergency relay valve.
f. Coat exhaust check valve with soap solutionand apply brakes.
g. Release brakes and apply coating of soapsolution to exhaust port.
h. Close shut off cock on prime mover, dis-connect the EMERGENCY air hose couplingfrom the prime mover, and coat exhaust portwith soap solution.
5-48. Removal of Air FilterRemove air filter as follows:
5-46. Removal of Emergency Relay ValveRemove emergency relay valve as follows:
5 - 2 6
a. Release air pressure from the air brakesystem by opening drain cock on air reservoir.
b. Unscrew nuts which secure the two air1ines to air filter.
two hex nuts and washer frbolt which attaches air filter.
d. Withdraw U-bolt and remove air filter.
5-49. Replacement of Air FilterPeplacement of the air filter is the reverse of re-moval (para 5-48).
5-50. Replacement of Air LineReplace air line as follows:
a. Relieve pressure in the air system by open-ing drain cock on air reservoir.
b. Remove tubing fittings from couplings andunscrew fittings from tubing.
c. Using hacksaw or tube cutter, cut new tub-ing to desired length, making sure the end issmooth, uncrimped, and cut squarely with thetube wall insure that interior of tubing is cleanand free of foreign matter.
NOTEServiceable fittings may be reused, butall sleeves must be replaced.
d. Place nut and new sleeve on tubing andinsert end of tubing into fitting.
e. Holding tube in place, tighten nut untilsufiicient pressure is placed on sleeve to preventleakage.
f. Connect tube fittings, couplings and anytube supporting hardware.
g. Connect prime mover air brake system tooperations van air brake system and pressurize.
h. Coat all connections with soap solution,and observe for soap bubbles. Tighten connec-tions as necessary.
5-51. Suspension Assembly
5-52Refer to the Suspension Assembly figure in TM11-5820-763-25P when performing the followingprocedures.
5-53. Removal and Disassembly of SpringAssembly
Remove andlows:
disassemble spring assembly as fol-
a. Extend leveling jacks and landing gear untiltires barely touch the ground.
TM 11-5820-763-15
b. Loosen the four nuts on U-bolt on the sideof the operations van opposite from which springassembly is to be removed.
c. Remove the four nuts and lockwashers fromU-bolts on side from which spring assembly ist o b e r e m o v e d .
d. Remove the two long bolts and rollers whichretain each end of spring assembly in the springhanger bracket.
e. Extend leveling jacks enough to enablespring assembly to be removed from spring han-ger bracket. Remove spring assembly.
NOTENormally the spring assembly is onlydisassembled into separate leaves to re-place broken or cracked leaves.
f. Clamp spring in vise near center bolt tohold leaves in tension.
g. File or grind peened ends off clip bolts andcenter bolt and remove hex nuts.
h. Remove four clip bolts and center bolt.
i. Gradually relieve tension of leaves by re-leasing vise. Separate leaves.
WARNINGProlonged contact of skin with cleaningsolvent or inhalation of fumes is danger-ous. Adequate ventilation must be pro-vided.
j. Clean each leaf with cleaning solvent (Fed-eral Spec P-S-661) and inspect each leaf forcracks and breaks. Replace defective leaves.
5-54. Replacement of Spring AssemblyReplace spring assembly as follows :
a. Assemble leaves in proper order, startingwith top (larger) leaf.
b. Align holes for center bolt and insert boltthrough hole.
NOTELeaf clips must be tight enough to holdleaves in alignment without restrictingfree movement.
C. Place leaves in vise and press leaves tightlytogether.
d. Install hex nut on center bolt, tighten Se-curely, and peen end of bolt.
5-27
TM 11-5820-763-15
e. Install two clip spacers, clipbolts, and hexnuts in each small leaf clip and huge leaf clipon springs. Peen ends of bolts over nuts.
f. With operation van jacked up, positionspring assemblywith nut of center bolt in recessof spring seat and bent ends of spring leaf inspring hanger bracket.g. Install the two bolts and rollers in the
spring hanger brackets under the spring leafnear the bent ends.
h. Install two U-bolts, four lockwashers, andfour nuts tighten nuts.
i. Tighten U-bolt nuts on spring assembly onopposite side of operations van.
5-55. Removal of Radius RodRemove radius rods follows:
a. Remove nuts from screw attaching eachend of radius rod.
b. Pull out screws and remove cupped re-tainers, rubber bushings, spindles, and flat re-tainers.
WARNINGProlonged contact of skin with cleaningsolvent or inhalation of fumes is danger-ous. Adequate ventilation must be pro-vided.
c. Remove radius rod and clean all meta1 partswith cleaning solvent (Federal Spec P-S-661).
d. Visually inspect for bent, badly worn, de-teriorated, or otherwise damaged parts. Replacefaulty parts.
5-56. cement of Radius RodReplace us rod as follows:
a. Position radius rod in spring bracketand radius rod bracket.
b. Position one flat retainer on each side ofradius rod knuckles.
c. Slide a spindle into place at each end ofradius rod.
d. Install rubber bushings and cupped retainers.
e. Secure each end of radius rod with screwand nut.
f. Adjust roadside radius rod (para 5-1.9).
5-57. Removal and Replacement of AxleAssembly
5-58.Refer to the Axle Assembly figure in TM 11-5820-763-25P when performing the followingprocedures.
5-59. Removal of AxleTo remove the operations van axle, proceed asfollows:
a. Extend leveling jacks and landing gear highenough so that tires do not touch the ground.Place blocks under both sides of axle.
b. Open air reservoir drain cock to relieve airpressure in air brake system.
c. Remove wheels (para 5-25).
d. Remove hubs and brakedrums (para 5-31).
e. Remove brake assemblies (para 5-32).
f. Disconnect hydraulic line at tee on rearcenter of axle and at each brake assembly.
g. Remove two hex nuts and lockwashers fromeach spring U-bolt and remove axle assemblyfrom under operations van.
WARNINGProlonged contact of skin with clean-ing solvent or inha1ation of fumes isdangerous. Adequate ventilation mustbe provided.
h. Remove grease from spindles with cleaningsolvent (Federal Spec P-S-661) and check bear-ing and seal seats for roughness. File or grindsmooth all high spots, burrs, or roughness.
5-60. Replacement of AxleReplace axle as follows:
a. Install brake assemblies on axle (para 5-34).
b. Raise axle assembly and block up so thatnut of spring center bolt is seated in recess ofaxle spring seat.
c. Attach axle assembly with four U-bolts,eight lockwashers and nuts.
d. Connect hydraulic brake line to tee at eachbrake assembly.
e. Install hubs and brakedrums (para 5-35).
f. Install wheels (para 5-28).
5 - 2 8
TM 11-5820-763-15
g. Adjust roadside radius rod and adjust andbleed brakes (para 5-1.9 and 5-1.55, resp.).
5-61. Landing Gear Assembly
5 - 6 2 .
Refer to the Retractable Support figure in TM11-5820-763-25P when performing the follow-ing procedures.
5-63. Removal and Disassembly of LandingG e a r
Remove and disassemble the landing gear asfollows :
a. With the operations van connected to primemover, raise landing gear until gear shoes arebarely touching the ground.
b. Remove the nine hex head screws attach-ing each gear box to operations van frame.
c. Remove hex head screws attaching eachlanding gear brace to landing gear leg and re-move landing gear box cover and gasket.
e. Remove nut and bolt securing bevel gearshaft.
f. Drive out bevel gear shaft and pull out crank-shaft. Do not drive out bushings unless theyrequire replacement.
g. Remove locknut and lift off spring clip, 18-tooth bevel gear, machine key, and bearing cone.Cup will remain in gear box and should not bedriven out unless excessively worn or damaged.
h. Remove pipe plug, spring and gib.
i. Pull shouldered shaft and lower leg out ofbottom of upper leg casting, and slide off thrustbearing.
j. Remove shouldered shaft by sliding 18-toothbevel gear and machine key over the end of theshouldered shaft and turning.
k. Remove the 18-tooth bevel gear and machinekey from the shouldered shaft.
j. Place locking ball and spring in hole.k. Attach gasket and gear box cover with four
screws and lockwashers.
Section II. SPECIAL MAINTENANCE
l. Push in the two nut retaining pins and re-move the elevating nut and pins from lower leg.
m. Remove landing gear shoe from lower leg.
WARNINGProlonged contact of skin with cleaningsolvent or inhalation of fumes is dan-gerous. Adequate ventilation must beprovided.
n. Clean all parts with cleaning solvent (Fed-eral Spec P-S-661) and inspect each part forexcessive wear or damage. Replace faulty parts.
5-64. Assembly and Replacement of LandingG e a r
a. Attach landing gear shoe to lower leg withhex head bolt, two flat washers, pin, and self-locking nut.
b. Position elevating nut in end of lower legand secure elevating nut with two nut retainingpins inserted from inside bore of elevating nut.
C. Thread bottom end of shouldered shaft intoelevating nut and install thrust bearing on upperend.
d. Slide shouldered shaft and lower leg as-sembly into upper leg, rotating lower leg so thatkey way is aligned with pipe hole.
e. Insert gib, spring, and pipe plug.
f. Install upper bearing cone, machine key,18-tooth bevel gear and spring and secure withlocknut.
g. Position 12-tooth bevel gear, washer, andspur r in gear box.
h. Slide bevel gear shaft and woodruff keyinto position and secure shaft with nut and bolt.
i. Position other spur gear and slide crank-shaft into place and attach gear with groovedpin.
5 - 6 5 . S c o p e pability of the organizational/depot level. WhereThis section contains maintenance instructions applicable, reference should be made to the ap-for correcting malfunctioning assemblies where plicable parts assembly TM 11-5820-763-25Pthe scope of repair is normally beyond the ca- for the location of parts of the particular assembly
5 - 2 9
TM 11-5820-763-15
requiring maintenance. The information containedin this section is also intended for use by depotpersonnel.
5-66, Mechanical TolerancesTable 5-6 gives the minimum and maximum clear-ances, in inches of new and rebuilt parts. It alsogives wear tolerances which indicate that point towhich a part or parts may be worn before replace-ment. Normally, all parts are considered servicea-ble provided they have not been worn beyond thedimensions shown under wear tolerance or are notdamaged from corrosion.
5-67. ions Van MechanicalMaintenance
5-69. Brakedrum Maintenance
5-68.Refer to the Axle Assembly figure in TM 11-5820-
a. Remove brakedrum from hub (pars 5-31).
b. Place brakedrum on lathe and check dia-meter for braking surface. Refer to table 5-6.
c. Refinish brakedrum braking surface if ne-cessary.
d. If refinishing requires removal of more thanone-sixteenth of an inch of metal (l/8-inch indiameter), replace drum with a new one (para5-35).
Table 5-6. Mechanical Tolerances
5 - 3 0
TM 11-5820-763-15
CHAPTER 6
CIRCUIT DIAGRAMS
6-1. Purpose 6 - 8 .
6 - 2 .This chapter illustrates by schematic, cabling,
all circuits and interconnect-to the operations van.
6-3. Scope
6 - 4 .The components covered in this chapter are onlythose for which a separate technical manual hasnot been prepared. For circuit diagrams of indi-vidual equipments not included herein, refer tothe applicable technical manual listed in Appen-dix A to this manual.
6 - 9 .
6-5. Arrangement
6 - 6 .
cabling diagrams are ar-gical breakdown. For exam-
as primary ac power isfollowed by individual schematic diagrams of
6-10 through 6-25 are parts
All graphic electrical and electronic symbols con-form to MIL-STD-l5-1A. All abbreviations usedconform to MIL-STD-12C with the following ex-ceptions:
CHMUXPERFVFTG
MultiplexPerformanceVoice Frequency Telegraph Group
The following statements are applicable to thecircuit diagrams contained in this chapter.
a. Component values are indicated as follows:resistances are in ohms unless otherwise noted( K - 1000 ohms, MEG - l,OOO,OOO ohms);capacitances are in microfarads unless otherwisenoted (uuf - micromicrofarads); inductancesare in microhenrys unless otherwise noted (MH- millihenrys, H - Henrys).
b. DC resistance of coils, chokes, and trans-formers in excess of one ohm are indicated ad-jacent to the component.
c. All wires shown directly terminated insideassembly or subassembly blocks, without connect-ors, are solder connected.6-7. Circuit Diagram Reference Data
Figure 6-1. Primary AC Power, Schematic Diagram(Sheet 1 of 2).
(Located in back of manual.)
6 - 1
TM 11-5820-763-15
6-2Figure 6-1(2). Primary AC Power, Schematic Diagram (Sheet 2 of 2).
TM 11-5820-763-15
Figure 6-2. Regulated Primary AC Power, SchematicDiagram.
6-3
TM 11-5820-763-15
Figure 6-3. Alarm-monitor, Schematic Diagram.
Figure 6-4. Recorder Control, Schematic Diagram.(Located in back of manual.)
6-4
TM 11-5820-763-15
Figure 6-5. Speaker Panel, Schematic Diagram.
Figure 6-6. Baseband Order Wire PatchPanel Cabling Diagram
(Sheet 1 of 2).(Located in back of manual.)
Figure 6-6. Baseband and Order WirePatch Panel Cabling Diagram
(Sheet 2 of 2).(Located in back of manual.)
Figure 6-7. Interequipment Cabling Data(Sheet 1 of 21).
(Located in back of manual)
Figure 6-7. Interequipment Cabling Data(Sheet 2 of 21).
(Located in back of manual.)
6 - 5
TM 11-5820-763-15
CableNo.
W501W502W503
W504
W505
W506
W507
W508
W509W510W511
W512
W513
W514
W515
W516
W517
W518
W519
W520
W521
W522
W523
W524
W525
W526
W527
From-Exciter 1: 1A10J4Exciter 1: 1A12J6Signal line extension box: J520
Exciter 1: J3
Exciter patch panel: Exciteroutput 1
Exciter 2: J3
Exciter patch panel: Exciteroutput 2
Signal line extension box: J521
Exciter 1: 1A10J1Exciter 1: 1A9J18Exciter 1: 1A2J2
Exciter 1: 1A2J5
Exciter 2: 1A2J2
Exciter 2: 1A2J5
MDF block 2B:
20-1*20-2
MDF block 2B:
22-1*22-2
Order wire telephone set: PAD
Order wire telephone set: AMP
Receiver 1: 6J1
Receiver 1:. 6J3
Receiver 1: 6J5
Receiver 1: GA2TR1-
25*2627
Receiver 1: 6A2J3
Receiver 2: 6J1
Receiver 2: 6J3
Receiver 2: 6J5
Receiver 2: 6A2TB1-
25*26
To-Exciter 2: 1A12J6Exciter 2: 1A10J4Exciter patch panel: PWRAMP. IN 1
Exciter patch panel: Ex-citer output 1
Exciter patch panel: PWRAMP.IN 1
Exciter patch panel: Ex-citer output 2
Exciter patch panel: PWRAMP. IN 2
Exciter patch panel: PWRAMP. IN 2
Exciter 2: 1A9J18Exciter 2: 1A10J1Baseband and order wirepatch panel: J3.
Baseband and order wirepatch panel: J4.
Baseband and order wirepatch panel: J5.
Baseband and order wirepatch panel: J6
Baseband and order wirepatch panel:
J29*J29
Baseband and order wirepatch panel:
J30*J30
Baseband and order wirepatch panel: J2
Baseband and order wirepatch panel: J8
Baseband and order wirepatch panel: J9
Baseband and order wirepatch panel: J11
Baseband and order wirepatch panel: J13
Baseband and order wire
patch panel:J10J10
Baseband and order wirepatch panel: J12
Baseband and order wirepatch panel: J14
Baseband and order wirepatch panel: J16
Baseband and order wirepatch panel: J18
Baseband and order wirepatch panel:
J15*J15
RG58CURG58CU
RG9BU
RG9BU
RG9BU
RG9BU
44WRG58CU
RG58CURG108AU
RG108AU
RG108AU
RG108AU
RG59BU
RG59BU
RG108AU
RG108AU
RG62U
RG62U
RG62U
RG108AU
RG108AU
RG62U
RG62U
RG62U
RG108AU
* Shield
Figure 6-7. Interequipment Cabling Data (Sheet 3 of 21).
RF input to power ampli-fier no. 1
Exciter no. 1 rf output
Patch cable
Exciter no. 2 rf output
Patch cable
RF input to power ampli-fier no. 2
Exciter no. 1 high fre-quency baseband input
Exciter no. 1 basebandmonitor
Exciter no. 3 high fre-quency baseband input
Exciter no. 2 basebandmonitor
Multiplexer set unbal-anced input
Multiplexer set unbal-anced input
Order wire telephone setoutput
Order wire telephone setinput
Receiver no. 1 basebandcombiner lift
Receiver no. 1 order wirecombiner lift
Receiver no. 1 order wiremonitor
Receiver no. 1 basebandmonitor
Receiver no. 1 order wiremonitor
Receiver no. 2 basebandcombiner lift
Receiver no. 2 order wirecombiner lift
Receiver no. 2 order wiremonitor
Receiver no. 2 basebandmonitor
EL5820- 763- 15-TM-1
6 - 6
TM 11-5820-763-15
W588 Receiver a: GA2J3
W529 Receiver 3: 6J1
W530 Receiver 3: 6J3
W531 Receiver 3: 6J5
W532 Receiver 3: 6A2TB1-
25*2627
W533 Receiver 3: 6A2J3
Baseband and order wire RG108AUpatch panel: J17
Baseband and order wire RG62Upatch panel: J19
Baseband and order wire RG62Upatch panel: J21
Baseband and order wire RG62Upatch panel: J23
Baseband and order wire RG108AUpatch panel:
J20*J20J20
Baseband and order wire RG108AU
Receiver no. 2 order wirmonitor
Receiver no. 3 baseband combiner liftReceiver no. 3 order wir
combiner liftReceiver no. 3 order wir
monitorReceiver no. 3 baseband
monitor
Receiver no. 3 order wir
Receiver 4: 6J1
Receiver 4: 6J3
Receiver no. 4 basebandcombiner lift
Receiver no. 4 order wircombiner lift
Receiver 4: 6J5
Receiver 4: 6A2TB1-
Receiver no. 4 order wir
Receiver no. 4 baseband
no. 4 order wir
Receiver 1: 6A7J36Receiver 2: 6A7J36Receiver 3: 6A7J36Receiver 1: 6A7J10Receiver 1: 6A8J22Receiver 2: 6A8J22Receiver 3: 6A8J22Receiver 4: 6A8J22Signal line extension box: J501Signal line extension box: J502Signal line extension box: J503Signal line extension box: J504Signal line extension box: J517Exciter patch panel: EXCITER
DUMMY LOAD in 1Exciter patch panel: EXCITER citer 2: 1A6J1
DUMMY LOAD in 2Fault indicator 1, 5TB1: line extension
l Shield
Figure 6-7. Interequipment Cabling Data (Sheet 4 of 21.).
6 - 7
TM 11-5820-763-15
W555
W556
W557
W558
W559
From-
Fault indicator 1, 5TB1
(cont):3132222325262829
Fault indicator 1, 5TB1:3435373840414344
Fault indicator 1, 5TB1:464749505253
Fault indicator 1, 5TB1:55565859
78
Fault indicator 2, 5TB1:
124578
1011131416171920222325262829
Fault indicator 2, 5TB1:343537
* Shield
ignal line extensionpanel, J506 (cont):
12 pr w/shield(cont):
0 Orange
STUVW
Exciter 1, 1A2TB1:2524212018171514
Receiver 1, 6A2TB1:141516171819
Receiver 2, 6A2TB1:141516171819
ignal line extension box,J507:
ABcDEFGHJKLMN0RSTUVW
Exciter 2, 1A2TB1:252421
Cable type orwire and color
Green
BrownRedGrayBlackBlue
12 pr w/shield:WhiteBlueWhiteOrangeWhiteGreenWhiteBrown
6 pr w/shield:WhiteBlueWhiteOrangeWhiteGreen
6 pr w/shield:WhiteBlueWhiteOrangeWhiteGreen
25 pr w/shield:
WhiteBlueWhiteOrangeWhiteGreenWhiteBrown
GrayRedBlueRedOrangeRedBrownRedGrayBlackBlue
12 pr w/shield:WhiteBlueWhite
RecycleDehydratorDehydratorLow cool levelLow cool levelLow cool tempLow cool tempHigh cool tempHigh cool temp
Mod transferMod transferModModVery high VSWRVery high VSWRRFRF
Radio pilotRadio pilotNoise ampNoise ampThres transThres trans
Radio pilotRadio pilotNoise ampNoise ampThres transThres trans
Fil chg ovldFil chg ovldCab tempCab tempAlm pwr supAlm pwr sup
Low, fwd powerLow, fwd powerFil regFil regRecycleRecycleLow cool levelLow cool levelLow cool tempLow cool tempHigh cool tempHigh cool temp
Mod transferMod transferMod
Figure 6-7. Interequipment Cabling Data (Sheet 5 of 21).
6-8
TM 11-5820-763-15
Very high V8WRVery high VSWR
indicator 2, 5TB1:
Exciter 1: 1A10J5 Exciter 1: 1A12J8Exciter 1:1A12J7 Exciter 1: 1A10J6Exciter 2: 1A10J6 Exciter 2: 1A12J7Exciter 2: 1A12J8 Exciter 2: 1A10J5
Located in power amplifier van
Alarm-monitor TB1:
24 vdc battery charge24 vdc battery charge120 vdc battery chargeBase power on line
Base on bussGen no. 2 on bussDiesel no. 1 alarm
* Shield EL5820-673-15-TM-4
Figure 6-7. Interequipment Cabling Data (Sheet 6 of 21).
6 - 9
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
W576W577W578W579W581
Receiver 1: 6A2JlReceiver 2: 6A2J1Receiver 3: 6A2J1Receiver 4: 6A2J1MDF, block 3E:
1-11-21-31-41-51-62-12-2 2-32-42-52-63-l3-2
3-33-43-53-64-l4-24-34-44-54-65-l5-25-35-45-55-66-l6-26-36-4 6-56-67-17-27-37-47-5 7-68-l8-28-38-48-58-6
Receiver 1, 6A2TB1: 23Receiver 2, 6A2TB1: 23Receiver 3, 6A2TB1: 23Receiver 4, 6A2TB1: 23AN/MCC-13 rack 1,1A1TB1-2-3:
12
171833344950656681829798
113114129130145146161162177178193194209210225226241242257258273274289290305306321322337338353354369370
RG9BU RG9BURG9BURG9BU20 AWG solid20 ft lg grayjacket:
whiteBluewhiteOrangewhiteGreenwhiteBrown
Gray
BlueRedOrangeRedGreenRedBrownRedGrayBlackBlueBlackOrangeBlackGreenBlackBrownBlackGrayYellowBlueYellowOrangeYellowGreenYellowBrownYellowGrayVioletBlueVioletOrangeVioletGreenVioletBrownVioletGray
Channel no.:
1
2
3
4
5
6
7
8
9
10
11
12
’ 13
’ 14
* 15
- 16
’ 17
- 18
* 19
* 20
21
22
23
24
Spares
ELS820-7630IS-TM-5
6 - 1 0Figure 6-7. Interequipment Cabling Data (Sheet 7 of 21).
TM 11-5820-763-15
MDF, block 3E: N/MCC-13 rack 1,
15-TM-6
Figure 6-7. Interequipment Cabling Data (Sheet 8 of 21).6 - 1 1
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
W584
From-MDF, block 3E (cont):
17-517-518-l18-218-318-418-518-519-119-219-319-419-519-620-l20-220-320-420-520-621-121-221-321-421-521-622-122-222-322-422-522-623-123-223-323-423-523-624-124-224-324-424-524-6
MDF, block 3D:
To-N/MCC-13 rack 1,1A3TB1-2-3 (cont):
333449506566 81829798
113114129130145146161162177178193194209210225226241242257258273274289290305306321322337338353354 369370
AN/MCC-13 rack 1,1A1TB1-2-3:
34
192035365152
Cable type orwire and color
20 AWG solid20 ft lg grayjacket (cont):
WhiteGreenwhiteBrownwhiteGrayRedBlue
OrangeRedGreenRedBrownRedGrayBlackBlueBlackOrangeBlackGreenBlackBrownBlackGrayYellowBlueYellowOrangeYellowGreenYellowBrownYellowGrayVioletBlueVioletOrangeVioletGreenVioletBrownVioletGray
20 AWG solid20 ft lg grayjacket:
WhiteBluewhiteorangewhiteGreenWhiteBrown
Figure 6-7. Interequipment Cabling Data (Sheet 9 of 21).
Function
Channel no. (cont):
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72} SparesChannel no. :
EL5820-763-15-TM-7
6 - 1 2
TM 11-5820-763-15
Equipment and terminal (MDF terminations listed by row andterminal; 20-1 is row 20, terminal 1) Cable type or
No. wire and colorFunction
From- T O -
W584 MDF, block 3D (cont): AN/MCC-13 rack 1, 20 AWG solid Channel no. (cont):(cont) 1A1TB1-2-3 (cont): 20 ft lg gray
jacket (cont):2 - 3 67
w h i t e
2 - 4 68 Gray } 5
2-52-6
83 RedBlue } 684
3-l 99 Red3 - 2 100 Orange } 73 - 3 115
Red3 - 4 116 Green } 8
3 - 5 131 Red3 - 6 132 Brown } 94-1 147 Red4 - 2 10- 146 Gray }4 - 3 163 Black4 - 4 164 Blue } 114 - 5 179 Black4 - 6 180 Orange } 125-1 195 Black5 - 2 196 Green } 135 - 3 211 Black5 - 4 212 B r o w n } 1 4
5 - 5 227 Black5 - 6 228 Gray } 156-1 243 Yellow6 - 2 244 Blue } 166 - 3 259 Yelluw6 - 4 260 Oange } 17
6 - 5 275 Yelluw6 - 6 276 Green } 187 - 1 291 Yelltm7 - 2 292 Brown } 197 - 3 307 Yellow7 - 4 308 Gray } 207 - 5 323 Violet7 - 6 324 Blue } 21
. 8 - 1 339 Violet8 - 2 340 Orange } 228 - 3 355 Violet8 - 4 356 Green } 238 - 5 371 Violet8 - 6 372 Brown } 24
Violet
W585 AN/MCC-13 rack 1,Gray } Spares
MDF, block 3D: 20 AWG solid Channel no.:1A2TB1-2-3: 20 ft lg gray
jacket:9-1 3 white9 - 2 4 Blue } 25
9-3 19 white9 - 4 20 Orange } 269 - 5 35 White9-6 36 Green } 2 7
10-l 5152
White10-2 Brown } 281 0 - 3 67 white1 0 - 4 68 Gray } 291 0 - 5 83 Red10-6 84 Blue } 30
EL5820-763-15-TM-8
6 - 1 3
Figure 6-7. Interequipment Cabling Data (Sheet 10 of 21).
TM 11-5820-763-15
W585(cont)
W586
MDF, block 3D (cont):
11-l11-211-311-411-511-612-112-21 2 - 31 2 - 41 2 - 512-613-113-213-313-41 3 - 513-614-114-21 4 - 31 4 - 41 4 - 514-615-115-215-315-415-515-616-116-216-31 6 - 41 6 - 516-6
MDF, block 3D:
17-117-217-317-417-517-618-118-218-318-41 8 - 518-619-119-219-319-4
AN/MCC-13 rack 1,1A2TB1-2-3 (cont):
991090115116131132147148163164179180195196211212227228243244259260275276291292307308323324339340355356371372
AN/MCC-13 rack 1,1A3TB1-2-3:
34
1920353651526768838499
100115116
20 AWG solid20 ft lg gray
jacket (cont):OrangeRedGreenRedBrownRedGrayBlackBlueBlackOrangeBlackGreenBlackBrownBlackGrayYellowBlueYellowOrangeYellowGreenYellowBrownYellowGrayVioletBlueVioletOrangeVioletGreenVioletBrownVioletGray
20 AWG solid20 ft lg grayJacket:
WhiteBlueWhiteOrangeWhiteGreenWhiteBrownWhiteGrayRedBlueRedOrangeRedGreen
Figure 6-7. Interequipment Cabling Data (Sheet 11 of 21).
Channel no. (cont):
} 31
} 32
} 33
} 34
} 35
} 36
} 37
} 38
} 39
} 46
} 41
} 42
} 43
} 44
} 45
} 46
} 47
} 48
} SparesChannel no.:
} 49
} 50
} 51
} 52
} 53
} 54
} 55
} 56
E L 5 8 2 0 - 7 6 3 - 1 5 - T M - 9
6-14
TM 11-5820-763-15
Function
19-519-620-l20-220-320-420-520-621-l21-221-321-421-521-622-l22-222-322-422-522-623-123-223-323-425-523-624-124-224-324-424-524-6
MDF,block 3C:
1-11-21-31-41-51-62-12-22-32-42-52-63-13-23-33-43-53-64-14-2
To-AN/MCC-13 rack 1,
1ASTB1-2-3(cont):
131132147148163164179180195196211212227228243244259260275276291292307308323324339
355256371372
AN/MCC-13 rack 1,1A1TB1-2-3:
131429304546616277789394
109110125126141142157158
GrayBlackBlueBlackOrangeBlackGreenBlackBrownBlackGrayYellowBlueYellowOrangeYellowGreenYellowBrownYellowGrayVioletBlueVioletOrangeVioletGreenVioletBrownVioletGray
20 AWG solid20 ft lg grayjacket:
whiteBlueWhiteOrangeWhiteGreen
BrownWhiteGray
Figure 6-7. Interequipment Cabling Data (Sheet 12 of 21).
Channel no. (cont):
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
SparesChannel no.:
1
2
3
4
5
6
7
8
9
1 0
6 - 1 5
TM 11-5820-763-15
CableNo.
W587(cont)
From-
MDF, block 3C (cont):
4 - 3 1734 - 4 1744 - 5 1894 - 6 1905-1 2055-2 2065 - 3 2215 - 4 2225 - 5 2375-6 2386 - 1 2536 - 2 2546 - 3 2696 - 4 2706 - 5 2856 - 6 2867-1 3017-2 302
7-3 3177-4 3187-5 3337-6 3348-1 3498-2 3508 - 3 3658 - 4 3668 - 5 3818-6 382
W588 MDF, block 3C:
Equipment and terminal (MDF terminations listed by row andterminal; 20-1 is row 20, terminal 1)
T o -
AN/MCC-13 rack 1,1A1TB1-2-3 (cont):
AN/MCC-13 rack 1,1A2TB1-2-3:
9-1 139-2 149-3 299-4 309-5 4 59-6 46
10-1 6110-2 6210-3 7710-4 7810-5 9310-6 9411-1 10911-2 11011-3 12511-4 12611-5 14111-6 14212-1 15712-2 15812-3 17312-4 17412-5 18912-6 190
20 AWG solid Channel no. (cont):20 ft lg grayjacket (cont):
B l a c kBlueBlackOrangeBlackGreenBlackBrownBlackGrayYellowBlueYellowOrangeYellowGreenYellowBrownYellowGrayVioletBlueVioletOrangeVioletGreenVioletBrownVioletGray
20 AWG solid20 ft lg grayjacket:
WhiteBlueWhiteOrangeWhiteGreenWhiteBrownWhiteGrayRedBlueRedOrangeRedGreenRedB r o w n RedGrayBlackBlueBlackOrange
Figure 6-7. Interequipment Cabling Data (Sheet 13 of 2l).
Function
11
12
13
14
15
16
17
18
19
20
21
22
23
24
I SparesChannel no.
} 25
26
27
28
29
30
31
32
33
34
35
36
EL5820-763-15-TM-11
6-16
TM 11-5820-763-15
Equipment and terminal (MDF terminations listed by row andterminal; 20-1 is row 20, terminal 1) Cable type or Function
No. wire and colorFrom- To-
W588 MDF, block SC (cont): AN/MCC-13 rack 1, 20 AWG solid Channel no. (cont)(cont) 1A2TB1-2-3 (cont): 20 ft lg gray
13-1 205 jacket (cont):
13-2 206 Green 37
13-3 221 Black13-4 222 Brown 3813-5 237 Black13-6 238 Gray 3914-1 253 Yellow14-2 254 Blue 4014-3 269 Yellow14-4 270 Orange 4114-5 285 Yellow14-6 286 Green 4215-1 301 Yellow15-2 302 Brown 4315-3 317 Yellow15-4 318 Gray 4415-5 333 Violet15-6 334 Blue 4516-1 349 Violet16-2 350 Orange 4616-3 365 Violet16-4 366 Green 4716-5 381 Violet16-6 382 Brown 48
VioletGray } Spares
W589 MDF, block 3C: AN/MCC-13 rack 1, 20 AWG solid Channel no.:1A3TB1-2-3: 20 ft lg gray
jacket:17-1 13 White17-2 14 Blue 4917-3 29 White17-4 30 Orange 5017-5 45 White17-6 46 Green 5118-1 61 White18-2 62 Brown 5218-3 77 White18-4 78 Gray 5318-5 93 Red18-6 94 Blue 5419-1 109 Red19-2 110 Orange 5519-3 125 Red19-4 126 Green 5619-5 141 Red19-6 142 Brown 5720-1 157 Red20-2 158 Gray 5820-3 173 Black20-4 174 Blue 5920-5 189 Black20-6 190 Orange 6021-1 205 Black21-2 206 Green 6121-3 221 Black21-4 222 Brown 62
EL5820-763-15-TM-12
Figure 6-7. Interequipment Cabling Data (Sheet 14 of 2l).
6-17
TM 11-5820-763-15
CableEquipment and terminal (MDF terminations listed by row and
terminal; 20-1 is row 20, terminal 1) Cable type orN o . wire and color
from- To-W589
(cont)
W5000W5001W5002W5003W5004W5005W5006W5007W5008W5009W5010W5011W5012
W5013W5014W5015W5016W5017W5018W5019W5020W5021W5022W5023W5024W5025W5026W5027W5028W5029W5030W5031
MDF, block 3C (cont):
21-521-622-122-222-322-422-522-623-123-223-323-423-523-624-124-224-324-424-524-6
AN/MCC-13:
4A1TB14A1TB14A1TB14A1TB14A1TB14A1TB22A1TB12A1TB12A1TB12A1TB12A1TB12A1TB23A1TB1
3A1TB13A1TB13A1TB13A1TB1SA1TB13A1TB13A1TB13A1TB13A1TB13A1TB13A1TB13A1TB23A1TB23A1TB24A2TB14A2TB14A2TB14A2TB14A2TB1
AN/MCC-13 rack 1,1A3TB1-2-3 (cont):
237238253254269270285286301302317318333334349350365366381382
AN/MCC-13:
1A1TB1-31A1TB2-31A2TB1-21A2TB2-31A3TB1-21A3TB2-31A1TB1-21A1TB2-31A2TB1-21A2TB2-31A3TB1-21A3TB2-32A2TB1
2A2TB12A2TB12A2TB12A2TB12A2TB12A2TB12A2TB12A2TB12A2TB12A2TB12A2TB12A2TB22A1TB22A1TB23A1TB13A1TB13A1TB13A1TB13A1TB1
20 AWG solid20 ft lg grayjacket (cont):
BlackGrayYellowBlueYellowOrangeYellowGreenYellowBrownYellowGrayVioletBlueVioletOrangeVioletGreenVioletBrownVioletGray
20 AWG solid15 ft lg grayjacket
RG187U 12 ft lggray jacket
EL5820-763-TM-13
Channel no. (cont):
} 63
} 64
} 65
} 66
} 67
6 - 1 8Figure 6-7. Interequipment Cabling Data (Sheet 15 of 21).
TM 11-5820-763-15
RG108AU 18 ft Thru group send
Thru group send
AN/MCC-13 rack 4, RG108AU 18 f’t
AN/MCC-13 rack 4, RG108AU 18 ft
VFTG rack 1, block 1:
VFTG rack 1, block 2:
VFTG rack 1, block 2:
* Shield EL5820-763-15-TM-14
Figure 6-7. Interequipment Cabling Data (Sheet 16 of 21).
6-19
TM 11-5820-763-15
CableEquipment and terminal (MDF terminations listed by row and
terminal; 20-1 is row 20, terminal 1) Cable type orNo. wire and color Function
F r o m - To-W 5055 MDF, block 3B: VFTG rack 1, block 1: 20 AWG, solid TTY DC SEND channel
28 ft 1g:1-1 A-E1-1 White1-2 A-E2-1 Blue } 11-3 A-E1-2 White1-4 A-E2-2 Orange } 21-5 A-E1-3 White1-6 A-E2-3 Green } 32-1 A-E1-4 White2-2 A-E2-4 Brown } 42-3 A-E1-5 White2-4 A-E2-5 Gray } 52-5 A-E1-6
VFTG rack 1, block 2: TY DC REC channel no.:
EL5820-763-15-TM-15
Figure 6-7. Interequipment Cabling Data (Sheet 17 of 21).
6 - 2 0
TM 11-5820-763-15
FTG rack 1, block 1:
FTG rack 1, block 2:
* Shield EL5820-763-15-TM-16
Figure 6-7. Interequipment of Cabling (Sheet 18 of 21).
6-21
TM 11-5820-763-15
Equipment and terminal (MDF terminations listed by row andCable terminal; 20-1 is row 20, terminal 1) Cable type or
No. wire and color Function
From- To-
W5060 MDF, block 3A: VFTG rack 1, block 2: 20 AWG 28 ft lg.:25-2 D-E15-13 White25-3 D-E16-13 Blue25-1*
W5061 MDF, block 3A: VFTG rack 1, block 1: 20 AWG solid 28ft Channel no.:lg gray jacket:
1-1 C-E5-1 White1-2 C-E6-1 Blue } 251-3 C-E5-2 White1-4 C-E6-2 Orange } 261-5 C-E5-3 White1-6 C-E6-3 Green } 272-1 C-E5-4 White2-2 C-E6-4 Brown } 282-3 C-E5-5 White2-4 C-E6-5 Gray } 292-5 C-E5-6 Red2-6 C-E6-6 Blue } 303-1 C-E5-7 Red3-2 C-E6-7 Orange } 313-3 C-E5-8 Red3-4 C-E6-8 Green } 323-5 C-E5-9 Red3-6 C-E6-9 Brown } 334-1 C-E5-10 Red4-2 C-E6-10 Gray } 344-3 C-E5-11 Black4-4 C-E6-11 Blue } 354-5 C-E5-12 Black4-6 C-E6-13 Orange } 365-1 D-E7-1 Black5-2 D-E8-1 Green } 375-3 D-E7-2 Black5-4 D-E8-2 Brown } 385-5 D-E7-3 Black5-6 D-E8-3 Gray } 396-l D-E7-4 Yellow6-2 D-E8-4 Blue } 406-3 D-E7-5 Yellow6-4 D-E8-5 Orange } 416-5 D-E7-6 Yellow6-6 D-E8-6 Green } 427-1 D-E7-7 Yellow7-2 D-E8-7 Brown } 437-3 D-E7-8 Yellow7-4 D-E8-8 Gray } 447-5 D-E7-9 Violet7-6 D-E8-9 Blue } 458-1 D-E7-10 Violet8-2 D-E8-10 Orange } 468-3 D-E7-11 Violet8-4 D-E8-11 Green } 478-5 D-E7-12 Violet8-6 D-E8-12 Brown } 48
VioletGray } Spares
W5062 MDF, block 3A: VFTG rack 1, block 1: 20 AWG solid 28ft Channel no.:lg gray jacket:
10-1 C-E13-1 White10-2 C-E14-1 Blue } 25
* Shield EL5820-763-15-TM-17
Figure 6-7. Interequipment of Cabling (Sheet 19 of 21).
6-22
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
11-612-112-212-312-412-512-613-113-213-313-413-513-614-114-214-314-414-514-615-115-215-315-415-515-616-116-216-316-416-516-617-117-217-317-417-517-6
W5063 VFTG, E-28:
1W5064 VFTG, E-28:
34
C-E13-7C-E14-7C-E13-8C-E14-8C-El3-9C-E14-9C-El3-10C-E14-10C-E13-11C-E14-11C-E13-12C-E14-12D-E15-1D-E16-1D-El5-2D-El6-2D-El5-3D-E16-3D-E15-4D-E16-4D-E15-5D-E16-5D-E15-6D-El6-6D-El5-7D-El6-7D-E15-8D-E16-8D-E15-9D-E16-9D-E15-10D-El6-10D-El5-11D-E16-11D-E15-12D-E16-12
RedGreen } 32RedBrown } 33RedGray } 34BlackBlue } 35BlackOrange } 36BlackGreen } 37BlackBrown } 38BlackGray } 39YellowBlue } 40YellowOrange } 41YellowGreen } 42YellowBrown } 43YellowGray } 44VioletBlue } 45VioletOrange } 46VioletGreen } 47VioletBrown } 46VioletGray } Spares
TDMS TRANS TB-12: 16 ft:
6WhiteBlue
TDMSREC TB-12: 16 ft:
2WhiteBlue
EL5820-763-15-TM-18
Figure 6-7. Interequipment of Cabling (Sheet 20 of 21).
6 - 2 3
TM 11-5820-763-15
W5066
W5067
W5068
MDF, block 2B:
l - ll-2l-3l-41-51-62-12-22-32-42-52-63-13-23-33-43-53-64-14-24-34-44-5
AN/MCC-13 rack 3, 3AlTB2
TDMS TRANSTB-12-9
Exciter 1: TB16789
10
Order wire tel set,block 2B:
7-l7-27-37-47-57-68-18-28-38-48-58-69-l9-29-39-49-59-610-l10-210-310-410-510-6
AN/MCC-13 rack 2,2A2TB2
AN/MCC-13 rack 2Rack ground
Exciter 2: TB16789
10
20 AWG solid 12ft lg grayjacket:
whiteBluewhiteOrangeWhiteGreenWhiteBrownwhiteGrayRedBlueRedOrangeRedGreenRedBrownRedGrayBlackBlueBlackOrange
12 ft lgWhite
12 ft lg
BlackWhiteRedWhiteBlue
Figure 6-7. Interequipment of Cabling (Sheet 21 of 21).
Multiplexer set inter-connections
EL5820-763-15-TM-19
6 - 2 4
TM 11-5820-763-15
Figure 6-8. 24 V DC Cabling Diagram.6 - 2 5
TM 11-5820-763-15
6 - 2 6Figure 6-10(1). Radio Set Group OA-6997V/MRC-85(V)2 (Sheet 1 of 3).
TM 11-5820-763-15
Figure 6-10(2). Radio Set Group OA-6997/MRC-85(V)2 (Sheet 2 of 3).
6-27
TM 11-5820-763-15
Figure 6-10(3). Radio Set Group OA-6997V/MRC-85(V)2 (Sheet 3 of 3).6 - 2 8
TM 11-5820-763-15
Figure 6-11. Signal Line Extension Panel.
6-29
TM 11-5820-763-15
Figure 6-12. Transmitter Group.6 - 3 0
TM 11-5820-763-15
Figure 6-13. Voice Frequency Terminal Assembly.
6-31
TM 11-5820-763-15
Figure 6-14(1). Test Equipment and Cabinet assembly(Sheet 1 of 2).
6-32
TM 11-5820-763-15
Figure 6-14(2). Test Equipment and Cabinet Assembly(Sheet 2 of 2).
6-33
TM 11-5820-763-15
Figure 6-16. Alarm-Monitor BZ-106/MRC-85(V)2.6 - 3 4
TM 11-5820-763-15
Figure 6-17. Alarm-monitor Assembly.
6-35
TM 11-5820-763-15
Figure 6-18. Audio and Alarm Box Assembly.
6 - 3 6
TM 11-5820-763-15
Figure 6-19. Order Wire and Telephone Set Assembly
6 - 3 7
TM 11-5820-763-15
Figure 6-20. Drinking Water Dispenser Assembly.
6-38
TM 11-5820-763-15
Figure 6-21. Test Equipment Dolly Assembly.
6-39
TM 11-5820-763-15
Figure 6-22. Semitrailer, Van V-205/MRC-85(V).6-40
TM 11-5820-763-15
Figure 6-23. 115 Volt Electrical Installation.6-41
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
6 - 4 2
Figure 6-24(1). 24 Volt Electrical Installation (Sheet 1 of 2).
TM 11-5820-763-15
Figure 6-24(2). 24 Volt Electrical Installation (Sheet 2 of 2).
Figure 6-25. Securing and Storage Facilities(Sheet 1 of 2).
(Located in back of manual.)
6-43
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
Figure 6-25(2). Securing and Storage Facilities (Sheet 2 of 2).
6-44
TM 11-5820-763-15
APPENDIX A
REFERENCES
The following publications contain information applicable to the operation and maintenance of RadioSet Group OA-6997(V)/MRC-85(V)2:
DA Pam 310-4
DA Pam 310-7TM 11-5820-741-15
TM 11-5820-742-15
TM 11-5820-742-25P
TM 11-5820-745-15
TM 11-5820-747-15
TM 11-5820-754-15
TM 11-5820-754-25P
TM 11-5820-755-15
TM 11-5820-755-25P
TM 11-5820-757-15
TM 11-5820-762-15
TM 11-5820-762-25P
Index of Technical Manuals, Technical Bulletins, Supply Manuals (types7,8, and 9), Supply Bulletins, and Lubrication Orders
U.S. Army Equipment Index of Modification Work OrdersOperator, Organizational, DS, GS, and Depot Maintenance Manual Includ-
ing Repair Parts and Special Tool Lists: Alarm Monitor BZ-66/FRC-39A(V), BZ-8O/MRG-98, and Fault Indicator, Type 958A (RadioEngineering Laboratories)
Operator, Organizational, DS, GS, and Depot Maintenance Manual: TestSet, Radio AN/FRM-7, AN/FRM-13, AN/GRM-57, AN/MRM-8, andRadio Engineering Laboratories Performance Monitor Type 1005C
Organizational, DS, GS, and Depot Maintenance Repair Parts and SpecialTools List: Test Set, Radio AN/MRM-8
Operator, Organizational, DS, GS, and Depot Maintenance Manual Includ-ing Repair Parts and Special Tool Lists: Multiplexer Group OA-7008/MRC-85(V)2 Northern Radio Type 283, Model 1)
Operator, Organizational, DS, GS, and Depot Maintenance Manual Includ-ing Repair Parts and Special Tool Lists: Receiver-Transmitter, Order-Wire OA-7006/MRC-85(V)2 (Graybar Type GB320)
Operator, Organizational, DS, GS, and Depot Maintenance Manual: Ampli-fier-power Supply Group OA-2975/FRC-39A(V), OA-3157/FRC-39A(V), OA-7078/FRC39A(V)1, OA-7095/GRC and OA-6576(V)/GRC (Radio Engineering Laboratories Types 959, 959A, 959B, 1012, and1012A)
Organizational, DS, GS, and Depot Maintenance Repair Parts and SpecialTools List: Amplifier-Power Supply Groups OA-7095/GRC and OA-6576(V)/GRC
Operator, Organizational, DS, GS, and Depot Maintenance Manual: Trans-mitter Group OA-3155/FRC-39A(V) and OA-7079/FRC-39A(V)1(Radio Engineering Laboratories, Inc. Types 952 and 952A)
Organizational, DS, GS, and Depot Maintenance Repair Parts and SpecialTools List: Transmitter Group OA-3155/FRC-39A (V)
Operator, Organizational, DS, GS, and Depot Maintenance Manual: Am-plifier-Power Supply Groups OA-2973/FRC-39A(V) and OA-4408/MRC-98 (Radio Engineering Laboratories, Inc. Types 954 and 954B)
Operator, Organizational, DS, GS, and Depot Maintenance Manual: RadioSet Groups OA-6988/MRC-85(V)1 and OA-7007/MRC-85(V)2
Organizational, DS, GS, and Depot Maintenance Repair Parts and SpecialTools List: Radio Set Group OA-7007/MRC-85(V)2
A-1
TM 11-5820-763-15
APPENDIX B
MAINTENANCE ALLOCATION
Section I. INTRODUCTION
B-1. General
B-2. Maintenance Functionswill be limited to and de-
and electrical characteristics with establishedstandards.
b. TEST. To verify serviceability and to detectincipient electrical or mechanical failure by use ofspecial equipment such as gages, meters, etc. Thisis accomplished with external test equipment anddoes not include operation of the equipment andoperator type tests using internal meters or indi-cating devices.
c. SERVICE. To clean, to preserve, to charge,and to add fuel, lubricants, cooling agents, andair. If it is desired that elements, such as paint-ing and lubricating, be defined separately, theymay be so listed.
d. ADJUST. To rectify to the extent neces- into proper operating range.
or mechanical sys-
vers or trans-
test equipment used in precise measurement. Con-sists of the comparison of two instruments oneof which is a certified standard of known ac-curacy, to detect and adjust any discrepancy inthe accuracy of the instrument being comparedwith the certified standard.
g. INSTALL. To set up for use in an opera-tional environment such as an encampment site,or vehicle.
h. REPLACE. To replace unserviceable itemswith servicable like items.
i. REPAIR. To restore an item to serviceablecondition through correction of a specific failureor unserviceable condition. This function includes,but is not limited to welding, grinding, riveting,straightening, and replacement of parts otherthan the trial and error replacement of runningspare type items such as fuses, lamps, or electrontubes.
j. OVERHAUL. Normally, the highest degreeof maintenance performed by the Army in orderto minimize time work in process is consistentwith quality and economy of operation. It con-sists of that maintenance necessary to restorean item to completely serviceable condition asprescribed by maintenance standards in technicalpublicationa for each item of equipment. Over-haul normally does not return an item to likenew, zero mileage, or zero hour condition.
k. REBUILD. The highest degree of materialmaintenance. It consists of restoring equipmentas nearly as possible to new condition in accord-ance with original manufacturing standards. Re-build is performed only when required by opera-tional considerations or other paramount factorsand then only at the depot maintenance category.Rebuild reduces to zero the hours or miles theequipment or component thereof, has been inuse.
l. SYMBOLS. The uppercase letter placed in
B-1
TM 11-5820-763-15
the appropriate column indicates the lowestlevel at which that particular maintenance func-tion is to be performed.
B-3. Explanation of Formata. Column 1, group number. Column 1 lists
group numbers, the purpose of which is to iden-tify components, assemblies, subassemblies andmodules with the next higher assembly.
b. Column 2, functional group. Column 2 liststhe noun names of components, assemblies, sub-assemblies and modules on which maintenanceis authorized.
c. Column 3, maintenance functions. Column3 lists the maintenance category at which per-formance of the specific maintenance functionis authorized. Authorization to perform a func-tion at any category also includes authorizationto perform that function at higher categories.The codes used represent the various maintenancecategories as follows :Code Maintenance CategoryC - - - - - - - - - - - - - Operator/CrewO _ _ _ _ _ _ 0rganizational MaintenanceF _ _ _ _ _ _ _ _ _ _ Direct Support MaintenanceH------------General Support MaintenanceD-------------- Depot Maintenance
d. Column 4, tools and test equipment. Column
4 specifies, by code, those tools and test equipmentrequired to perform the designated function. Thenumbers appearing in this column refer to spe-cific tools and test equipment which are identifiedin table 1.
e. Column 5, Remarks. Self-explanatory.
B-4. Explanation of Format of Table 1, Tooland Test Equipment Requirements
The columns in Table 1, Tool and Test EquipmentRequirements are as follows :
a. Tools and Equipmeut. The numbers in thiscolumn coincide with the numbers used in thetools and equipment column of the MaintenanceAllocation Chart. The numbers indicate the ap-plicable tool for the maintenance function.
b. Maintenance Category. The codes in thiscolumn indicate the maintenance category nor-mally allocated the facility.
c. Nomenclature. This column lists tools, test,and maintenance equipment required to performthe maintenance functions.
d. Federal Stock Number. This column liststhe Federal stock number of the specific tool ortest equipment.
e. Tool Number. Not used.
B - 2
TM 11-5820-763-15SECTION II. MAINTENANCE ALLOCATION CHART
B - 3
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
TABLE I. TOOL AND TEST EQUIPMENT REQUIREMENTS
6625-643-1686
5180-605-0079
B - 4
Installation Operation
AirConditionerAIR CONDITIONER
M68A/E32C-11
AIR CONDITIONERM68A/E32C-11
Air Conditioner
ALARM-MONITORBZ-66/FRC-39A(V)
Fault Locating Indicator
Alarm-MonitorALARM-MONITOR
BZ-106/MRC-85(V)2
ALARM-MONITOR BZ-106/MRC-85(V)2
Alarm-Monitor
AMPLIFIER-POWER SUPPLY GROUPOA-3157/FRC-39A(V)
Receiver
Baseband and Order Wire Patch PanelPANEL, PATCHING, COMMUNICA-
TIONSSB-2319/MRC-85(V)2
CONNECTOR ASSBEMBLY, ELECTRICAL
Signal Line Extension Box
Distribution Box
S B - 2 3 2 4 / M R C - 8 5 ( V ) 2 * PANEL, POWER DISTRIBUTION
TRANSMITTER GROUPOA-3155/FRC-39A(V)
64, 96, f9 - - 16,19 -- f l
16, 19 - - f l , f 9
16, 19 - - f324, 47
24, 47 16,19 -- f3
16,19 -- f2, f9
- - - - f6, f937, 68, f4,f5, f6, f7
75, f14 - -
18
16,19 -- f2, f9
C R I - 1
OFFICIAL NOMENCLATURECommon Name
Exciter Patch PanelPANEL, PATCHING, COMMUNICA-
TIONSSB-232O/MRC-85(V)2
Fault Locating IndicatorALARM-MONITOR
BZ-66/FRC-39A(V)
LOUDSPEAKER, PERMANENT MAG-NET
LS-515/MRC-85(V)2Speaker Panel
Main Distributing Frame (MDF)MAIN DISTRIBUTING FRAME, TELE-
PHONETA-593/MRC-85(V)2
MAIN DISTRIBUTING FRAME, TELE-PHONE
TA-593/MRC-85(V)2Main Distributing Frame (MDF)
METER ASSEMBLY, ELECTRICALME-289A/MRC-85(V)2
Power Monitor
MULTIPLEXER GROUPOA-7008/MRC-85(V)2
Voice Frequency Telegraph (VFTG)Equipment
Multiplexer SetMULTIPLEXER SET
AN/MCC-13
MULTIPLEXER SETAN/MCC-13
Multiplexer Set
CROSS-REFERENCE INDEX (cont) TM 11-5820-763-15
Chapter 2Installation
Chapter 3Operation
Chapter 6circuit
DiagramsO r g / D e p o tMaintenance
Principles ofOperation
Align-ment
75, f8
16, 1928, 47
16, 19 f5
5, f2
5, f2
26, 60f9, t2 16, 19
3, 38, f2 16, 19
3 16, 19
3 16, 19
CRI-2
CROSS-REFERENCE INDEX (cont) TM 11-5820-763-15
CRI-3
C R O S S - R E F E R E N C E I N D E X ( c o n t ) T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
CRI-4
A L P H A B E T I C A L I N D E X
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
Sub jec t P a r a g r a p h
A
D e s c r i p t i o n 1 - 3 0
AC Power Distribution, Functioning 4 - 1 6
A C P o w e r R e q u i r e m e n t s 2 - 1 2
A C P o w e r T u r n O f f P r o c e d u r e 3 - 1 2
A C P o w e r T u r n O n P r o c e d u r e 3 - 1 0
A i r B r a k e S y s t e m , F u n c t i o n i n g 4 - 7 8
A i r C h a m b e r , B r a k e 4 - 9 7
A i r C l e a n e r s , B r a k e S y s t e m , F u n c t i o n i n g 4 - 8 7
Air Cond i t i one r Duc t s In s t a l l a t i on 2 - 6 5
A i r C o n d i t i o n e r , G e n e r a l D e s c r i p t i o n 1 - 2 6
A i r C o n d i t i o n i n g , G e n e r a l D e s c r i p t i o n 1 - 1 0
A i r F i l t e r , R e m o v a l 5 - 4 8
A i r F i l t e r , R e p l a c e m e n t 5 - 4 9
A i r H o s e C o u p l i n g s , B r a k e , G e n e r a l D e s c r i p t i o n 1 - 1 34 - 8 5
A i r H o s e C o u p l i n g s F u n c t i o n i n g
A i r I n t a k e P o r t s , D e s c r i p t i o n 1 - 1 2
A i r L i n e R e p l a c e m e n t 5 - 5 0
A i r R e s e r v o i r , T h e o r y 4 - 8 9
Alarm and Monitoring, Functioning 4 - 4 7
A l a r m - M o n i t o r , F u n c t i o n i n g 4 - 2 4
A l a r m - M o n i t o r , G e n e r a l D e s c r i p t i o n 1 - 2 7
A l i g n m e n t o r A d j u s t m e n t 5 - 1 6
A l l i e d C o n s t r u c t i o n R e q u i r e m e n t s 2 - 3 2
A l t e r n a t e G r o u n d i n g I n s t a l l a t i o n 2-71
A u d i o a n d A l a r m B o x , G e n e r a l D e s c r i p t i o n 1 - 1 1
A x l e :A s s e m b l y o f M e c h a n i s m o n 5 - 3 4
R e m o v a l 5 - 5 9
R e p l a c e m e n t 5 - 6 0
R e p l a c e m e n t o f H u b a n d B r a k e d r u m o n 5 - 3 5
B
Baseband Ampl i f i e r No . 1 Fa i lu re 3 - 1 9
Baseband and Order Wire Patch Panel, General Description 1-28
Baseband and Order Wire Patch Panel, Functioning 4 - 6 8
B r a k e A d j u s t m e n t 5-37
B r a k e A i r C h a m b e r :F u n c t i o n i n g
4 - 9 7
R e m o v a l 5 - 4 4
R e p l a c e m e n t 5 - 4 5
B r a k e A i r H o s e C o u p l i n g s , G e n e r a l D e s c r i p t i o n1 - 1 3
B r a k e , A i r , T h e o r y4-78
B r a k e d r u m a n d H u b , R e m o v a l a n d D i s a s s e m b l y 5 - 3 1
B r a k e d r u m a n d H u b , R e p l a c e m e n t o n A x l e 5 - 3 5
B r a k e d r u m M a i n t e n a n c e5 - 6 9
B r a k e H y d r a u l i c S y s t e m , M a i n t e n a n c e5 - 3 9
A I - 1
ALPHABETICAL INDEX (cont)
TM 11-5820-763-15
S u b j e c t P a r a g r a p h
B (cont)
B r a k e M e c h a n i s m , R e m o v a l a n d D i s a s s e m b l y 5-32Brake Mechanism, Func t ion ing 4-108B r a k e s h o e s , R e l i n i n g 5 - 3 3
C
C a b l e R e q u i r e m e n t s 2 - 4 4C a b l i n g , I n t e r c o n n e c t i o n , I n s t a l l a t i o n 2 - 7 5C a b l i n g S h i p p e d 2 - 1 4C a p a b i l i t i e s a n d L i m i t a t i o n s 1 - 4 9C h a r a c t e r i s t i c s , O p e r a t i o n s V a n
F u n c t i o n i n g1-494 - 3 0
C h a r t R e c o r d , G e n e r a l D e s c r i p t i o n 1 - 2 9C o n d i t i o n s o f R e s h i p m e n t 2 - 8 3C o n n e c t o r , 2 4 - V o l t D C , G e n e r a l D e s c r i p t i o n 1 - 2 4C o n s t r u c t i o n R e q u i r e m e n t s 2 - 3 2
C o n t r o l s a n d I n d i c a t o r s , O p e r a t i o n s V a n E x t e r i o r 3 - 5C o n t r o l s a n d I n d i c a t o r s , O p e r a t i o n s V a n I n t e r i o r
C u r b s i d e D o o r s , G e n e r a l D e s c r i p t i o n3 - 71 - 1 4
D
D C V o l t a g e R e q u i r e m e n t s a n d S o u r c e s 5 - 1 0D e s c r i p t i o n a n d P u r p o s e
D i s a s s e m b l y a n d R e m o v a l :1 - 1
B r a k e M e c h a n i s mH u b a n d B r a k e d r u m
5 - 3 2
5 - 3 1L a n d i n g G e a r
D i s a s s e m b l y o f S p r i n g5 - 6 3
5 - 5 3D i s t r i b u t i o n B o x , G e n e r a l D e s c r i p t i o n 1 - 3 0D o o r , R e a r , G e n e r a l D e s c r i p t i o n
1 - 2 0D o o r s , C u r b s i d e , G e n e r a l D e s c r i p t i o n
1 - 1 4D u c t s , A i r C o n d i t i o n e r , I n s t a l l a t i o n
2 - 6 5
E
E l e c t r o n i c M a i n t e n a n c e
E m e r g e n c y : 5-20
A C P o w e r T u r n O f f P r o c e d u r e3 - 1 4
B r a k e s , F u n c t i o n i n g4 - 9 0
O p e r a t i o n3 - 1 5
P a t c h i n g , B a s e b a n d
P a t c h i n g , O r d e r W i r e A m p l i f i e r N o 13 - 1 9
R e p l a y V a l v e , R e m o v a l3 - 2 1
5 - 4 6R e l a y V a l v e , R e p l a c e m e n t
5 - 4 7R e l a y V a l v e , F u n c t i o n i n g
E q u i p m e n t :4 - 9 0
R e q u i r e d b u t N o t S u p p l i e d
S u p p l i e d , O p e r a t i o n s V a n1-491 - 4 9
T r a n s p o r t e d D i e s e l G e n e r a t o r V a n2 - 3 1
T r a n s p o r t e d i n P o w e r A m p l i f i e r V a n2 - 2 9
A I - 2
ALPHABETICAL INDEX (cont)T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
S u b j e c t P a r a g r a p h
E (cont)
Exciter Patch Panel:F u n c t i o n i n g 1 - 3 2
G e n e r a l D e s c r i p t i o n 1 - 3 1E x c i t e r s , G e n e r a l D e s c r i p t i o n 4 - 7 6
E x h a u s t P o r t s , G e n e r a l D e s c r i p t i o n 1-12E x t e n s i o n B o x , S i g n a l L i n e , G e n e r a l D e s c r i p t i o n 1 - 2 2E x t e r i o r , O p e r a t i o n s V a n 1 - 7
F
Fault Indicators:F u n c t i o n i n g 4 - 2 8
G e n e r a l D e s c r i p t i o n 1 - 3 3F i l t e r , A i r :
R e m o v a l 5 - 4 8R e p l a c e m e n t 5 - 4 9
F l o o r P l a n , O p e r a t i o n s V a n 2 - 4 0F u n c t i o n i n g :
AC Power Distribution 4 - 1 6Alarm-Monitor 4-24C h a r t R e c o r d e r s 4 - 3 0F a u l t I n d i c a t o r s 4 - 2 8P o w e r M o n i t o r 4 - 2 6
G
G e n e r a l :S u p p o r t I t e m s 1 - 4 7Test Equipment 1 - 4 6
G e n e r a l D e s c r i p t i o n 1 - 3G r o u n d C o v e r R e q u i r e d 2 - 3 5Ground Rod Assembly In s t a l l a t i on 2-69Ground Strip Connections 2 - 1 9
Ground ing P l a t e In s t a l l a t i on 2 - 7 1
Hardstand Layout 2 - 3 7H o s e C o u p l i n g s , B r a k e A i r
F u n c t i o n i n g 4 - 8 5G e n e r a l D e s c r i p t i o n 1 - 1 3
H u b :Removal of Wheel from 5 - 2 5R e p l a c e m e n t o f W h e e l o n 5 - 2 8
H u b a n d B r a k e d r u m :R e m o v a l a n d D i s a s s e m b l y 5 - 3 1
Replacement on Axle 5-35H u b a n d W h e e l B r a k e M e c h a n i s m , R e m o v a l a n d R e p l a c e m e n t 5 - 3 0
A I - 3
ALPHABETICAL INDEX (cont)TM 11-5820-763-15
Subject P a r a g r a p h
I
Identification of Components 2 - 4 4I n d i c a t o r s , F a u l t , D e s c r i p t i o n 1 - 3 3
I n t e r c o n n e c t i n g C a b l e R e q u i r e m e n t s 2 - 4 4I n t e r c o n n e c t i n g C a b l i n g I n s t a l l a t i o n 2 - 7 5I n t e r i o r , O p e r a t i o n s V a n 1 - 3 5
L
L a d d e r I n s t a l l a t i o n 2 - 5 8L a n d i n g G e a r , A s s e m b l y a n d R e p l a c e m e n t 5 - 6 4L a n d i n g G e a r A s s e m b l y , G e n e r a l D e s c r i p t i o n 1 - 1 5L a n d i n g G e a r , R e m o v a l a n d D i s a s s e m b l y 5 - 6 3L a n d i n g P a r t i c u l a r s , O p e r a t i o n s V a n 1 - 4 9Leve l ing Jack Assembly , Gene ra l Desc r ip t ion 1 - 1 6L e v e l i n g O p e r a t i o n s V a n 2 - 5 6L i f t i n g E y e s , G e n e r a l D e s c r i p t i o n 1 - 1 7L i g h t s , G e n e r a l D e s c r i p t i o n
1 - 1 8L i m i t a t i o n s a n d C a p a b i l i t i e s 1 - 4 9L i m i t a t i o n s w i t h R e s p e c t t o L o g i s t i c s a n d O p e r a t i o n 2 - 7L o c a l C o n t r o l R e q u i r e m e n t s 2 - 2 4L o c a l o r R e m o t e C o n t r o l R e q u i r e m e n t s 2 - 2 2L o c a t i o n 2 - 5
M
M a i n C i r c u i t B r e a k e r , G e n e r a l D e s c r i p t i o n1 - 3 4
M a i n D i s t r i b u t i o n F r a m e , G e n e r a l D e s c r i p t i o n 1 - 3 5M a i n t e n a n c e T e s t E q u i p m e n t 5 - 4M a i n t e n a n c e T e s t s , P r e v e n t i v e 5 - 6M a s t e r C y l i n d e r :
F u n c t i o n i n g4 - 1 0 1
Removal 5 - 4 0R e p l a c e m e n t
5 - 4 1M a t e r i a l H a n d l i n g E q u i p m e n t
2 - 4 1M e c h a n i c a l M a i n t e n a n c e 5 - 2 2M e c h a n i c a l T o l e r a n c e s 5 - 6 6M e t h o d s o f R e s h i p m e n t
2 - 8 1M u l t i p l e x , T e l e t y p e , F u n c t i o n i n g 4 - 3 8M u l t i p l e x , V o i c e F r e q u e n c y , F u n c t i o n i n g
4 - 3 3M u l t i p l e x e r , S e t G e n e r a l D e s c r i p t i o n
1 - 3 6
N
N e u t r a l P o w e r L i n e C o n n e c t i o n 2 - 1 8
O
O i l , L u b r i c a t i n g , R e m o v a l2 - 5 0
Operations VanExte r io r
1 - 7E x t e r i o r C o n t r o l s a n d I n d i c a t o r s
3 - 5
A I - 4
ALPHABETICAL INDEX (cont)
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
Subject P a r a g r a p h
O (cont)
Operations Van (cont):F l o o r P l a n 2 - 4 0I n t e r i o r 1 - 2 4
I n t e r i o r C o n t r o l s a n d I n d i c a t o r s 3 - 7L e v e l i n gMechanical Maintenance
2 - 5 6
5 - 6 7P o s i t i o n i n g 2 - 5 4S t o r a g e 2 - 8 7
O r d e r W i r eF u n c t i o n i n g 4 - 4 2
P a t c h P a n e l , G e n e r a l D e s c r i p t i o n 1-28T e l e p h o n e S e t , G e n e r a l D e s c r i p t i o n 1 - 3 7
Order Wire Amplifier No. 1 Failure 3 - 2 1
P a s s a g e w a y I n s t a l l a t i o n 2-63P a s s a g e w a y , W e a t h e r h o o d , I n s t a l l a t i o n 2 - 6 7Patch ing , Emergency:
Baseband Amplifier No. 1 3 - 1 9Order Wire Amplifier No. 1 3 - 2 7
P a t c h J a c k s 5 - 8P a t c h P a n e l
B a s e b a n d a n d O r d e r W i r e , G e n e r a l D e s c r i p t i o n 1 - 2 8B a s e b a n d a n d O r d e r W i r e , F u n c t i o n i n g 4 - 6 8E x c i t e r , G e n e r a l D e s c r i p t i o n 1 - 3 2
E x c i t e r , F u n c t i o n i n g 4 - 7 6O p e r a t i o n 4 - 6 7
P e r f o r m a n c e M o n i t o r , G e n e r a l D e s c r i p t i o n 1-38Performance Test Standards 5 - 6
P l a t o r m , P a s s a g e w a y I n s t a l l a t i o n 2 - 6 3
Positioning Operations Van 2 - 5 4
Post insta l la t ion Tuneup and Test 2-77P o w e r A m p l i f i e r V a n , E q u i p m e n t T r a n s p o r t e d 2 - 2 9P o w e r C a b l i n g 2 - 1 5P o w e r D i s t r i b u t i o n , F u n c t i o n i n g 4 - 1 6
P o w e r E n t r a n c e B o x , G e n e r a l D e s c r i p t i o n 1 - 1 9P o w e r M o n i t o r :
F u n c t i o n i n g 4 - 2 6G e n e r a l D e s c r i p t i o n 1-39
P o w e r R e q u i r e m e n t s 2 - 1 2P o w e r T u r n O f f P r o c e d u r e 3-12P o w e r T u r n O n P r o c e d u r e 3 - 1 0
P r e p a r a t i o n f o r R e s h i p m e n t 2 - 8 7P r e s e r v a t i v e R e m o v a l 2 - 5 0
P r e v e n t i v e M a i n t e n a n c e T e s t s 5 - 6
P r e v e n t i v e M a i n t e n a n c e W o r k c a r d s 5 - 1 2
P r i m a r y A C P o w e r R e q u i r e m e n t s 2 - 1 2
Purpose and Descript ion 1 - 1
A I - 5
A L P H A B E T I C A L I N D E X ( c o n t )T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
S u b j e c t P a r a g r a p h
R
R a d i u s R o d :R e m o v a l 5 - 5 5R e p l a c e m e n t 5 - 5 6
R e a r D o o r , G e n e r a l D e s c r i p t i o n 1-20R e c e i v e A n t e n n a F e e d T h r u , G e n e r a l D e s c r i p t i o n 1 - 2 1R e c e i v e r s , G e n e r a l D e s c r i p t i o n 1 - 4 1Receiving Data 2 - 3 8Receiv ing , Func t ion ing 4 - 1 1R e c o r d e r C o n t r o l :
F u n c t i o n i n g 4 - 6 1G e n e r a l D e s c r i p t i o n 1 - 4 2
R e c o r d e r s , C h a r t :Functional Theory 4 - 3 0
G e n e r a l D e s c r i p t i o n 1 - 2 9R e f e r e n c e D a t a 1 - 4 8R e f l e c t o r s , G e n e r a l D e s c r i p t i o n 1 - 1 8R e l a y V a l v e , E m e r g e n c y :
F u n c t i o n i n g 4 - 9 0R e m o v a l 5 - 4 6
R e l i n i n g B r a k e s h o e s 5 - 3 3Remote Control Requirements 2 - 2 6R e m o v a l a n d D i s a s s e m b l y
B r a k e M e c h a n i s m 5 - 3 2H u b a n d B r a k e d r u m 5 - 3 1H u b a n d W h e e l B r a k e M e c h a n i s m 5 - 3 0L a n d i n g G e a r 5-63Spring Assembly 5 - 5 3T i r e s a n d W h e e l s 5 - 2 4
R e m o v a lA i r F i l t e r 5 - 4 8Axle 5 - 5 9B r a k e A i r C h a m b e r 5 - 4 4
E m e r g e n c y R e l a y V a l v e 5 - 4 6M a s t e r C y l i n d e r 5 - 4 0P r e s e r v a t i v e 2 - 5 0Radius Rod 5 - 5 5Sealing Tape 2 - 5 0S k i d B a s e 2 - 9 9S u n r o o f T a r p a u l i n 2 - 4 8T r a n s i t C a s e s 2 - 4 8W a v e g u i d e 2 - 4 8W h e e l f r o m H u b 5 - 2 5
R e m o v a l a n d S t o r a g eComponents 2 - 8 7I n t e r c o n n e c t i n g C a b l i n g 2 - 8 7
R e p l a c e m e n t :A i r F i l t e rAir Line
5 - 4 9
A x l e5 - 5 0
Brake Air Chamber5 - 6 05 - 4 5
E m e r g e n c y R e l a y V a l v e 5 - 4 7
A I - 6
ALPHABETICAL INDEX (cont)
TM 11-5820-763-15
Subject P a r a g r a p h
R ( c o n t )
R e p l a c e m e n t ( c o n t ) :H u b a n d B r a k e d r u m o n A x l e 5 - 3 5L a n d i n g G e a r 5 - 6 4Master Cylinder 5 - 4 1R a d i u s R o d 5 - 5 6S p r i n g A s s e m b l y 5 - 5 4T i r e a n d W h e e l s 5 - 2 4T i r e o n W h e e l 5 - 2 7
W h e e l o n H u b 5 - 2 8R e s h i p m e n t 2 - 8 4
S h e l t e r i n g 2 - 1 0S i g n a l C a b l i n g S h i p p e d 2 - 1 5S i g n a l L i n e E x t e n s i o n B o x , G e n e r a l D e s c r i p t i o n 1 - 2 2S i t i n g 2 - 2Skid Base Removal 2 - 9 9
S p e a k e r P a n e l , G e n e r a l D e s c r i p t i o n 1 - 4 3S p r i n g A s s e m b l y :
R e m o v a l a n d D i s a s s e m b l y 5 - 5 3R e p l a c e m e n t 5 - 5 4
S t o r a g e a n d C o m p o n e n t s 2 - 8 7S t o r a g e a n d R e m o v a l o f I n t e r c o n n e c t i n g C a b l i n g 2 - 8 7S t o r a g e o f O p e r a t i o n s V a n 2 - 8 7Sunroof Tarpaulin Removal 2 - 4 8Support Items, General 1 - 4 7
Suspension Assembly, Maintenance 5 - 5 1
T
T e l e g r a p h D i s t o r t i o n M e a s u r e m e n t S y s t e m ( T D M S ) , G e n e r a l D e s c r i p t i o n 1 - 4 4T e l e t y p e M u l t i p l e x , F u n c t i o n i n g 4 - 3 8T e s t E q u i p m e n t 5 - 4
Test Equipment, General 1 - 4 6T e s t P o i n t s 5 - 8
T e s t s , P o s t i n s t a l l a t i o n 2 - 7 7
T e s t S t a n d a r d s , P e r f o r m a n c e 5 - 6T i r e R e m o v a l 5-24T i r e R e p l a c e m e n t 5 - 2 7T o l e r a n c e s , M e c h a n i c a l 5 - 6 6T r a n s i t C a s e s , R e m o v a l 2 - 4 8
T r a n s m i t t i n g , F u n c t i o n i n g 4 - 5Transportation Equipment 2 - 4 1Trenches Required 2 - 3 4Troubleshooting 5-13T u n e u p , P o s t i n s t a l l a t i o n 2 - 7 7
T u r n o f f P r o c e d u r e 3 - 1 2
Turn on Procedure 3 - 1 0Twenty-four Volt DC Connector, General Description 1 - 2 4
A I - 7
ALPHABETICAL INDEX (cont)
TM 11-5820-763-15
Subject Paragraph
U
Unit Identification 2 - 4 5Unpacking 2 - 4 5
V
Van Exterior, Controls and Indicators 3 - 5Van Interior, Controls and Indicators 3 - 7Van Location Selection 2 - 5
Ves t ibu l e In s t a l l a t i on 2 - 6 1
V F T G , G e n e r a l D e s c r i p t i o n 1 - 4 5
V T F G O p e r a t i o n 4 - 3 8
V o i c e F r e q u e n c y C h a n n e l O p e r a t i o n , 4 - 3 3
V o i c e F r e q u e n c y C h a n n e l O p e r a t i o n , 4 - 4 2
V o i c e F r e q u e n c y O r d e r W i r e C h a n n e l O p e r a t i o n , 4 - 3 3
V o i c e F r e q u e n c y T e l e g r a p h , G e n e r a l D e s c r i p t i o n 1 - 4 5Voltage Requirements, DC 5 - 1 0
W
W a v e g u i d e M o u n t s , S t o r a g e 2 - 1 0 1Wavegu ide Remova l 2 - 4 8W e a t h e r h o o d I n s t a l l a t i o n 2 - 6 7
Wheel:R e m o v a l 5 - 5 1
R e m o v a l f r o m H u b 5 - 2 5R e p l a c e m e n t o n H u b 5 - 2 8
T i r e R e p l a c e m e n t 5 - 2 7W h e e l B r a k e M e c h a n i s m , F u n c t i o n i n g 4 - 1 0 8
W h e e l C y l i n d e r s , F u n c t i o n i n g 4 - 1 0 8W o r k c a r d s 5 - 1 2
A I - 8
TM 11-5820-763-15
Figure 2-3. Operating Van Floor Plan.
TM 11-5820-763-15
Figure 2-3. Operating Van Floor Plan.
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
Figure 4-1. Voice Frequency Channel, Simplified Schematic Diagram.
TM 11-5820-763-15
Figure 4-1. Voice Frequency Channel, Simplified Schematic Diagram.
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
Figure 4-3. Voice Frequency Order Wire Channel, Simplified Schematic Diagram.
TM 11-5820-763-15
Figure 6-1(1). Primary AC Power, Schematic Diagram(Sheet 1 of 2).
TM 11-5820-763-15
Figure 6-1(1). Primary AC Power, Schematic Diagram.(Sheet 1 of 2).
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
Figure 6-4. Recorder Control, Schematic Diagram.
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
Figure 6-6(1). Baseband Order Wire Patch Panel Cabling Diagram(Sheet 1 of 2).
TM 11-5820-763-15
Figure 6-6(1). Baseband Order Wire Patch Panel Cabling Diagram(Sheet 1 of 2).
TM 11-5820-763-15
Figure 6-6(2). Baseband and Order Wire Patch Panel Cabling Diagram(Sheet 2 of 2).
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
Figure 6-6(2). Baseband and Order Wire Patch Panel Cabling Diagram(Sheet 2 of 2).
TM 11-5820-763-15
Figure 6-7(1). Interequipment Cabling Data (Sheet 1 of 21).
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
Figure 6-7(1). Interequipment Cabling Data (Sheet 1 of 21).
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
Figure 6-7(2). Interequipment Cabling Data (2 of 21).(Sheet 1 of 2).
TM 11-5820-763-15
TM 11-5820-763-15
Figure 6-9(1). Operations Van Functional Block Diagram
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
Figure 6-9(1). Operations Van Functional Block Diagram
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
Figure 6-9(2). Operations Van Functional Block Diagram(Sheet 2 of 2).
TM 11-5820-763-15
Figure 6-9(2). Operations Van Functional Block Diagram(Sheet 2 of 2).
T M 1 1 - 5 8 2 0 - 7 6 3 - 1 5
Figure 6-25(1). Securing and Storage Facilities (Sheet 1 of 2).
TM 11-5820-763-15
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