military training procedure template · 2020. 12. 18. · lms 11-13 electrical bonding...

MILITARY TRAINING PROCEDURE

LMS 13-1 Assembly Procedures

Effective Date: 12/1/2020 Version: 2

Owner: Paul Mueller, Director of Engineering //Signature on File//

Function: Hardware Engineering

Page 1 of 22

L3Harris Instruction Printed or electronic copies are uncontrolled, validate prior to use Printed on: December 17, 2020

PURPOSE Defines the requirements for assembly techniques and procedures that cannot be

categorized in other Link Training & Simulation (hereafter referred to as Link)

Manufacturing Instructions. Establishes procedures for part exchanges (by

Manufacturing) without formal authorization. Part exchanges for nonreparable parts

specified within this instruction may be made without initiation of a Class I or Class II

engineering change. This instruction shall be followed by personnel involved in

assembly of Link –designed equipment.

AFFECTED Hardware Engineering

FUNCTIONS Manufacturing

REFERENCES LMS 11-3 Hand Soldering, Electrical

LMS 11-13 Electrical Bonding

MIL-STD-188-124 Grounding, Bonding and Shielding

MIL-HDBK-505 Definitions of Item Levels, Item Exchangeability,

Models, and Related Terms

MIL-HDBK-419 Grounding Bonding and Shielding for Electronic

Equipment and Facilities

MIL-HDBK-454 General Guidelines for Electronic Equipment”

MIL-HDBK-1857 Grounding, Bonding and Shielding Design

Practices

MS3400 Connector, Receptacle, Electric, Wall Mounting,

(existing design) Front Release, Crimp Contact, AN Type FSC 5935

SAE-AS34001 Connector, Receptacle, Electric, Wall Mounting,

(new design) Front Release, Crimp Contact, AN Type FSC 5935

MS3452 Connector, Receptacle, Electrical, Box Mounting,

(existing design) Rear Release, Crimp Contact, AN Type

SAE-AS34521 Connector, Receptacle, Electrical, Box Mounting,

(new design) Rear Release, Crimp Contact, AN Type

MIL-STD-464 Electromagnetic Environmental Effects

Requirements for Systems

SAE-AS7928 Terminals, Lug and Splices, Conductors, Crimp

Style

SAE-AS27212 Terminal Board Assembly, Molded-In Stud,

Electric

A-A-59125 Terminal Boards, Molded, Barrier Screw and

Stud Types and Associated Accessories

1. Requirements

1.1 Assembly procedures.

a. Masking tape and electrical tape. The use of masking tape in equipment is permissible for such purposes as temporary identification of wires or other items of equipment during the test phase. Electrical tape may be used to provide temporary electrical

Procedure Number: LMS 13-1 Version: 2

Procedure Name: Assembly Procedures Page 2 of 22


insulation or protection of terminal ends of wires that are disconnected for testing, etc. Any masking or electrical tape used for the above purposes shall be removed and the equipment returned to an acceptable condition prior to customer acceptance.

b. Wiring potentiometers (2–inch diameter and larger). Wire lead length shall be approximately 4 inches from the main trunk of the harness and shall be routed as shown in Figure 1. Figure 1 may be considered as a top, side, or bottom view, depending upon the orientation of the potentiometer terminals when mounted.

Figure 1 Wiring Potentiometers

c. Shims, shafts. Shafts with snap rings shall be shimmed at assembly to prevent undue axial motion due to tolerance buildup between ring grooves. Laminated shims may be selected from the following:

Link PN 479419 (for 1/8–inch shaft) Link PN 479420 (for 3/16–inch shaft) Link PN 451137 (for 1/4–inch shaft)

d. Solderless lugs.

(1) Assembly arrangement of solderless lugs and their attaching hardware shall be as shown in the following paragraphs, unless otherwise specified on the engineering drawings.

(a) Terminal strip connection (Figure 2).

(b) Chassis ground connection, tapped mounting hole (Figure 3).

NOTE: Mounting surface prepared in accordance with MIL-STD-464 LMS 11-13 Electrical Bonding).

(c) Chassis ground connection, untapped hole (Figure 4).

NOTE: Mounting surface prepared in accordance with MIL-STD-464 (LMS 11-13 Electrical Bonding).

(d) Chassis ground connection, untapped hole - with secured mounting.

During assembly and subsequent wiring of assemblies, it may be

necessary to disassemble parts to gain access and mount lugged wires

at E1 ground positions. To avoid this disassembly, an additional flat

washer, lock washer, and nut may be used with the existing hardware

(Figure 5).


00111301

Main trunk

Trunk in middle alternate method.

Main trunk

Trunk on side preferred method.




Figure 2 Typical Terminal Strip Connection

Figure 3 Chassis Ground Connection (Tapped Hole)

Figure 4 Chassis Ground Connection (Untapped Hole)

00111302

Terminal lug

Nut

Flat washer

Flat washer

Flat washer

Terminal strip

Nut

Split lock washer

Stud

Terminal lug

Nut

Terminal strip Stud shoulder

Lock washer Stud

WITHOUT STUD SHOULDER

WITH STUD SHOULDER

00111303

Screw or bolt

Term lug

A. STEEL SURFACE

Screw or bolt

Flat washer(ALCLAD)

Flat washer

Split lock washer

Term lug

B. ALUMINUM SURFACE

Mounting surface(Aluminum)

Split lock washer

Mounting surface(Plated steel,CRES steel)

Flat Washer

Screw or boltNut

Flat washer

Split lock washer

Term lug

A. STEEL SURFACE


Screw or bolt

Nut

Flat washer

Split lock washer

Term lug

B. ALUMINUM SURFACE

Mountingsurface(Aluminum)

Flat washer (ALCLAD)Flat washer

00111304




Figure 5 Chassis Ground Connection

(Untapped Hole – Secured Mounting)

(e) Chassis ground connection, feed thru stud (Figure 6).


(f) Bus bar, tapped mounting hole (Figure 7). For voltage and power

return connections.

(g) Bus bar, untapped mounting hole (Figure 8). For voltage and power

return connections.

Figure 6 Chassis Ground Connection (Feed thru Stud)

00111305

Term lug

Stud

Flat washer

Nut


A. STEEL SURFACE

Split lockwasher

Split lock washer

Nut

Nut

Bolt or screw

Mountingsurface(Aluminum)

B. ALUMINUM SURFACE

Split lockwasher

Split lockwasher

Flat washerBolt or screw

Flat washer

Flat washer(ALCLAD)

Stud

Nut

Term lug

00111306

Stud

Flat washer

Nut

Nut

Nut

Mounting surface(Plated steel, CRES steel)

Split lock washer

Split lock washer

Split lock washer

Flat washer

Flat washer

Terminal lug




Figure 7 Bus Bar Connection (Tapped Hole)

Figure 8 Bus Bar Connection (Untapped Hole)

(2) Unless otherwise specified by the Engineering drawing, the hardware supplied

with the purchase material shall be used.

e. Mounting nylon or plastic parts. When specified on the engineering drawing, a flat

washer shall be used with a lock washer and nut to mount plastic or nylon parts,

spacers, or connectors to prevent distortion or damage. When an existing engineering

drawing does not specify a flat washer, Manufacturing shall utilize the hardware called

out. (See Figure 9.)

Figure 9 Plastic or Nylon Part Mounting

00111307

Screw or boltFlat washer

Split lock washer

Term lug

A. COPPER SURFACE

Screw or bolt

Aluminum bus bar

Flat washer

B. ALUMINUM SURFACE

Split lock washer

Term lug

Flat washer(ALCLAD)

Copper busbar

00111308

Copper busbar Screw or bolt

Nut

Flat washer

Flat washer

Split lock washer

Term lug

A. COPPER SURFACE

Screw or bolt

Flat washer(ALCLAD)

B. ALUMINUM SURFACE

Flat washer(ALCLAD)

Nut

Flat washer

Split lock washer

Term lug

Aluminum bus bar

00111309

NutStud

Mounting surface

Split lock washer Flat washer

Plastic or Nylonpart




f. Terminal markers (mylar).

(1) When mylar terminal markers are specified on the engineering drawing, the

markers (Link PN 858492) shall be ink stamped with the appropriate terminal

numbers as indicated on the assembly drawings. Numbers shall read as shown in

Figure 10.

Figure 10 Terminal Markers

(2) Mylar terminal markers shall be assembled on the terminal strip studs prior to

other components (Figure 11), and be secured with a flat washer and nut.

Figure 11 Terminal Marker Mounting

g. Connecting cables to instruments and panels. Cables to instruments and removable or

hinged panels, particularly in the simulator cockpit area, shall be installed and supported

with sufficient slack immediately behind the instrument or panel to permit connection

or disconnection of the cable connectors whenever the instruments or panels are

removed from their normal mounted positions.

00111310

5 3 1

2 2

6

00111311

NutStud

Terminal strip

Flat washer

Terminal marker




h. Heat sink compound.

(1) When mounting power transistors and diodes, apply a thin coating of heat sink compound similar to Link PN 479469 and Link PN 432434 to:

(a) The base and mounting stud

(b) Both sides of the insulating washer (when used)

(c) Any surface of the transistor or diode that contacts the heat dissipater

(2) The compound shall be applied directly from the tube and spread with an applicator, such as a stick.

(3) This procedure is not limited to diodes and transistors. These compounds may also be used with other electronic components subject to the same design requirements.

i. Sleeving applications.

(1) Transparent sleeving. For soldered connections, transparent sleeving shall be used as an insulator over connector and component sockets. Alternate pin sleeving may be used at the discretion of Manufacturing. (See Figures 12 and 13.)

Figure 12 Connector Sleeving

Figure 13 Socket Sleeving

00111312

Sleeve

CONNECTOR

Alternate pin sleeving shown for illustration purposes only

00111313

Exposed hot wire-sleeved




(2) Teflon. Teflon sleeving shall be used as an insulator where soldering heat and

soldering iron tip contact could damage other types of insulation and where

bare wire jumpers might touch. (See Figures 14, 15, and 16.)

Figure 14 Typical Sleeving

Figure 15 Typical Sleeving on a Terminal Board on a Wafer Switch

Figure 16 Typical Sleeving on a Coaxial Connector

j. Helicoil inserts. Helicoil inserts should be installed 3/4 P to 1-1/2 P below the surface

(P = thread pitch).

k. Bus bar terminations. When a lugged lead identification does not indicate a specific bus

bar terminal number, the lead may be attached to any convenient termination point of

the correct size on the bus bar, provided no more than four leads are attached to any one

terminal.

00111314TERMINAL BOARD

Teflon sleeved wire

Bare wire

00111315

WAFER SWITCH

00111316

Teflon sleeve

COAXIAL CONNECTOR




l. Number of lugs per terminal. The maximum number of lugs to be connected to any one

terminal on a terminal board shall be two for screw-type terminal boards covered by A-

A-59125, and as specified in the detail specification sheets for stud-type terminal

boards. Not more than four lugs shall be connected to any one terminal of a board

covered by SAE-AS27212. Accessories such as stud connectors, straddle plates, and

jumper and terminal board lugs shall be counted as lugs for this purpose.

m. Number of wires per terminal or lug (stranded wire only). The number of wires

terminated in an individual terminal or lug shall not be greater than three. Multisection

turret, bifurcated, or multi-hole lug terminals shall have not more than three wires per

section, tong, or hole. In no case shall the total cross sectional area of the terminated

wires exceed the cross sectional area capacity of the terminal or lug. Refer to Table I

for circular mil area of common wire sizes. Use this table to determine lug size (see

example).




Example: It is required to crimp two AWG 22 and one AWG 20 wires in one terminal lug. To determine

the lug to be used: add the circular mil area of the one AWG 20 wire to the circular mil area of

the two AWG 22 wires.

1020 (one AWG 20)

1280 (two AWG 22)

2300 Total circular mil

Using Table I, locate the next higher circular mil area in relation to the total circular mils required, in this case 2580

circular mil area in relation to the 2300 total circular mils required. Cross reference this circular mil area to the

equivalent wire size, in this case AWG 16.

Table I Circular MIL Area For Wire

AWG CIRCULAR MIL AREA AWG CIRCULAR MIL AREA

30

28

26

24

22

20

18

16

14

12

100

160

250

400

640

1020

1620

2580

4110

6530

10

8

6

4

2

0

00

000

0000

10380

16510

26240

41740

66360

105,600

133,100

167,800

211,600

n. Connector wiring (stranded wire only). Multiple conductors may terminate in a contact

provided the sum of the cross sectional areas of the conductors does not exceed the

maximum cross sectional area for which the contact is rated. Not more than one wire

shall be routed through any hole in the grommet of an environmentally sealed

connector.

o. Lugged lead connections. When specific wiring connections are not defined as point to

point (as in a schematic diagram), the number of lugged connections to a terminal shall

not exceed the number of connections depicted on the schematic diagram. (See Figure

17.)

00111317

R 1

R 3

R 5

R 2

R 4

R 6

Two lugged connectionsmaximum at this assembly level

One lugged connectionmaximum at this assembly level

1 2 3




Figure 17 Typical Lugged Lead Connections

p. Adding miscellaneous components/spot thru. Spot thru/hand-drilled holes specified on

assembly-type drawings and expressed in decimal form without tolerance shall be

governed by the drawing block tolerance unless otherwise specified. It is intended that

these hand-drilled holes will accept the fasteners assigned to them, and shall not be

drilled in such excess as to be detrimental to the fasteners’ locking device, e.g., lock

washers. In that instance, Engineering shall be notified.

1.2 Hardware exchanges. The exchanges authorized by this instruction apply only to specific items

and variations listed herein. The same basic item; type, material, finish, as specified on the

Engineering drawing shall be used, the exchange being limited to such features as variations of

length, size, diameter, and thickness. These exchanges meet the “exchangeability of items”

definition of MIL-HDBK-505.

a. Bolts, screws.

Lengths. The length of screws and bolts installed with nuts should be such that the

exposed portion of the screw or bolt is a minimum of 1-1/2 threads. The next longer or

shorter screw or bolt may be exchanged for that specified on the drawing.

b. Flat washers. Flat washers of different thickness and diameter of the same part number

may be used provided these differences are within the tolerance bands dictated on the

MS drawing.

c. Transparent plastic tubing (insulation). The next two sizes, larger or smaller diameter,

may be exchanged.

d. Cotter pins. The next size, longer or shorter, may be exchanged.

e. Rivets. The next standard length, longer or shorter, may be exchanged provided the

exposed portion does not interfere with adjacent structures, parts, items, hardware, etc.

When a shorter length is exchanged, care shall be exercised to insure the length is

sufficient to head properly.

f. Terminal lugs.

(1) Stud size. The next larger or smaller stud size (hole diameter) may be

exchanged, provided the possibility of no electrical shorting results.

(2) Crimp barrel size. Due to wire braid variations, the next larger or smaller

barrel size may be exchanged.

g. Ferrules and heat shrinkable solder splices for shielded wire. The next size, larger or

smaller, may be exchanged.

h. Wire.

(1) Wire of a higher voltage rating than that specified on the drawing may be used

provided the conductor size (AWG), type (stranded, solid), and type of

insulation (Teflon, for example) are the same as that specified, and the larger

outside diameter of the insulation will have no adverse effect, such as

overcrowding or poor fit in the equipment.

(2) Wire of a lower voltage rating than that specified on the drawing may not be

exchanged.




(3) Jumper wires.

(a) When solid, bare, tinned copper wire (used for jumper wires) is called

out on the drawing or wire list, with insulation sleeving, it shall be

permissible to exchange Teflon insulated, silver– coated copper, solid

wire of like gauge. The Teflon insulation shall be of 200 C extruded

type. Part numbers for the Teflon insulated wire are:

20 AWG-M16878/4BGA9

22 AWG-M16878/4BFA9

24 AWG-M16878/4BEA9

(b) When the drawing or wire list specifies short, insulated wire jumpers

between terminals on components or adjacent components such as

switches, relays, etc., it shall be permissible to exchange solid, bare

bus wire of the same gauge covered with a section of an appropriate

size of clear insulation. Length of the exchanged jumpers shall be

limited to 2 inches.

(c) On occasion, very short lengths of insulated wire are specified as

jumpers. Due to the extreme shortness of some of these jumpers, it is

difficult to strip the wire without pulling off all the insulation. Every

effort should be made to strip these short lengths of wire properly. In

the event the insulation is pulled off accidentally, it shall be

permissible to use the bare stripped wire, but only on the condition

that the wire cannot come in contact with anything, thereby causing a

malfunction. If this possibility does exist, a sufficient length of the

stripped insulation shall be slipped on the wire to provide the

necessary protection.




1.3 Power supply jumpers. Power supplies as received from the vendor will normally have

jumpers installed across the following terminal board terminals:

-S (-sense) to -V (-voltage)

+S (+sense) to +V (+voltage)

These terminal jumpers are not to be removed from the terminal strip unless the wiring list or

other next-assembly document specifies their removal.

If the wiring list or engineering drawing specifies that a jumper wire be added across terminals

which already have jumpers installed by the vendor, the vendor-installed jumpers may remain

in place instead of adding the jumper wire specified on the engineering drawing or wiring list.

1.4 Pressure connector terminations.

a. Cables/wires terminating in pressure connectors shall be limited to one cable or wire per

barrel. Cables/wires shall not be tinned by Manufacturing. If the engineering drawing

specifies a larger cable and a smaller wire both terminating in the same barrel, the

smaller wire shall be pigtailed to the larger cable by means of a compression cable

splice similar to that shown in Figure 18. (Heat-shrink tubing may be applied over the

splice if additional support of the smaller wire is advisable.) Only the larger cable shall

then terminate in the barrel of the pressure connector. On some types of components,

such as power circuit breakers, screw-lug tabs are provided in addition to the pressure

connectors. In this case, Manufacturing shall contact Engineering to specify a crimp-

type terminal lug on the smaller wire(s) and attaching to the screw lug tab.

(1) In those applications where the use of pressure connectors may not be

desirable because of situations caused by part location, wire routing, wire

versus connector size, etc., Manufacturing shall contact Engineering to specify

deleting the pressure connector and terminate the wire with a crimp-type

terminal lug.

Figure 18 Typical Pressure Connector

(2) The wire shall be so inserted that the insulation is firmly against the barrel end

or insulation support. Dimension “A” (Figure 19) shall be kept to a minimum.

In no case shall the wire extend far enough to come into contact, or interfere,

with the terminal mounting nut or screw head. The wire shall not be recessed

into the lug. It shall be at least flush with the end of the barrel (surface B).

00111318

Barrel (opening)

Pressure connector

Compression cable splice(See Table II)




Figure 19 Typical Assembled Pressure Connector

(3) When multiple–barrel pressure connectors are used, and the barrels and

cables/wires are of various sizes, the cables/wires shall be terminated in the

smallest barrel into which the cable or wire can be inserted. (See Figure 20.)

Figure 20 Multiple-Barrel Pressure Connectors

b. When specified on the engineering drawing, wires that are of a smaller gauge than that

for which the pressure connector is intended shall be spliced to a short piece (2 to 6

inches) of the proper size wire or cable. The larger size wire or cable shall then be

inserted into the pressure connector. For information on splices used for this situation,

refer to Table II.

Table II Pressure Connector Splices

Circular Mil

Area Range

Wire Size

(AWG)

Length in

Inches

HTI Part

Number (Ref)

509-3,260

2,050-5,180

5,180-13,100

13,100-20,800

20,800-33,100

33,100-52,600

52,600-83,700

83,700-119,500

119,500-150,500

150,500-190,000

190.000-231.000

22-16

16-14

12-10

8

6

4

2

0

00

000

0000

.301

.301

.343

.375

.437

.531

.640

.734

.734

.750

.765

NAS1387-1

NAS1387-2

NAS1387-3

1001724-08

1001724-09

1001724-10

1001724-02

1001724-04

1001724-11

1001724-01

1001724-03

( For circular mil areas of wire/ cables, see Table I.)

00111319

Surface B

Dimension A

00111320




c. Saddle-type terminations. The terminations of various components such as circuit

breakers, contactors, etc. shall be used as they were designed to be terminated. For

example: do not use a terminal lug if the termination was designed for a stripped lead,

unless otherwise specified by the drawing and/or wiring list.

If a saddle-type termination is used, it is permissible to insert two stranded wires of the

same AWG size. (See Figure 21.) However, if one wire is solid (for example: a lead

wire from a diode, capacitor, etc.) and of the same AWG size, make certain that both

wires are secure. (See Figure 21.)

Figure 21 Typical Saddle-Type Termination

d. Terminations other than saddle-type. The leads of components such as diodes,

capacitors, etc., that are mounted across circuit breakers, contactors, etc., shall be

terminated with a compression cable splice. (See Figure 22.) The part number of the

appropriate splice shall be specified on the drawing.

Figure 22 Typical Part Mounting Using a Compression Splice

e. In those cases where the wire gauge is within the size range of the pressure connector,

yet the connection is loose due to splaying of the wire strands, the wire may be folded

double before insertion into the connector. (See Figure 23.)

Figure 23 Termination For Wire Doubled Over

00111321

Saddle-typetermination

One wire maybe solid

Stripped wire 1or 2 places

00111322

Strippedwire

Compression cable splice(See Table II)

Cable

Component lead

00111323




1.5 Discrete component mounting. Leads of discrete components being mounted on equipment,

such as a capacitor across the contacts of a relay, shall be kept to a minimum length in order to

prevent interference with other components and reduce breakage due to flexing. Bend radii of

the leads shall be two times the lead diameter, minimum. If practicable, lead length from the

crimped lug or termination to the bend radius shall be a maximum of .50 inch. Lead length

from the component to the bend radius shall be a minimum of .125 inch. (See Figure 24.)

Figure 24 Discrete Component Mounting

1.6 Wire twisting requirements. Where twisted wire is called out on a drawing, the requirements of

Table III shall be met.

00111324

R= 2XD Min( D= Lead Dia)

.50 Max

.125 Min

.50 Max




Table III Minimum Twists Per Foot

AWG NUMBER OF CONDUCTORS

2 3 4 5 6 7

6

8

10

12

14

16

18

20

22 & up

3

3.5

4

6

7

8

9

10

12

2.5

3

3.5

4

5

5

7

9

11

1.5

2.5

3

3

3.5

4

5.5

7.5

9.5

1.5

2

2.5

2.5

3

3.5

5

7

8.5

1

2

2

2.5

2.5

3

5

6

8

1

1.5

1.5

2

2

2.5

4.5

5

7

1.7 Wiring/cable ducts. Where wiring or cable ducts (Panduit or equivalent) are fastened with a flat washer, lockwasher, and screw, apply a minimum length of 2.5 inches of fiberglass, Teflon-coated tape (Link PN 452839) over the head of the screw.

1.8 Series MS3400 (existing design) SAE-AS34001 (new design) connectors.

a. The pins of some MS3400 and SAE-AS34001 series connectors have exposed pins which constitute an electrical shock and high-current hazard if not guarded by strain relief adapters or other means. Connectors used by Link which have this hazard are the MS3452-series connectors with contact sizes #8 or larger. Whenever these connectors are used, cover the exposed terminals with shrink tubing as delineated in the typical connector of Figure 25.

Figure 25 Typical MS3400 and SAE-AS34001 Series Connector

b. MS3452-series connectors currently used by Link that require shock–high–current hazard prevention are listed below.

MS3452L20-14p MS345L22-22sx MS3452L24022px

MS3452L20-14s MS3452L22-22sy MS3452L24-22py

MS3452L22-2p MS3452L24-10p MS3452L24-22p

MS3452L22-2sw MS3452L24-10pw MS3452L24-22s

MS3452L22-2sx MS3452L24-10pz MS3452L24-22sw

MS3452L22-2sy MS3452L24-10s MS3452L24-22sx

MS3452L22-22p MS3452L24-10sw MS3452L24-22sy

MS3452L22-22px MS3452L24-10sz MS3452L32-17p

MS3452L22-22s MS3452L24-22pw MS3452L32-17s

00111325

Conn shell Pin Insert(s)

Pin, Contact

Wire

NOTE: ACTUAL CONNECTOR MAY NOT BE AS ILLUSTRATED

Exposed Terminal




1.9 Pushbutton display. Figure 26 illustrates a typical component arrangement of a pushbutton

display assembly. When reassembling, it should be noted that:

a. Once the lamp(s) is inserted into the lamp board assembly, the base plate is discarded.

b. Unless otherwise noted on the drawing, Manufacturing shall assume that the legend

plate is always visible, as shown in Figure 26. The diffusers and legend plate may be in

reverse order if the legend is not to be visible when the lamp is off, if so specified on the

drawing.

c. There will not be any legend plate in those cases where the legend is printed or

engraved on the face plate.

d. The lamp board assembly and the pushbutton housing are notched out in the upper left

corner (Figure 26) to assure proper indexing of the components.

Figure 26 Typical Pushbutton Display Assembly

1.10 Switch, oil-tight, illuminated, pushbutton.

a. Align contact block terminals with light module terminals as shown in Figure 27.

b. Install proper number of trim washers on switch to obtain minimum to maximum

dimension.

NOTE: Oil seal shown in Figures 27 and 28 must be in location (as shown) at all times.

c. When using the style of legend plate shown in Figure 27, put the legend plate with

indexing tab into corresponding panel slot.

NOTE: Discard the locking thrust washer which is supplied with each switch. Thread the ring nut onto

the switch and tighten.

00111326

Lamp Board Assy

Switch Housing

Lever Latch - Release

BasePlate(discard)

Lamp

Index Notch

Gasket

DiffusersLegend Plate

Index Notch

Push button Housing

Face Plate

Color Filter

Display Screen Divider




Figure 27 Oil-Tight Pushbutton Switch

d. When using the style of legend plate shown in Figure 28, align the slot in the legend

plate and the slot in the corresponding panel slot. Place the locking thrust washer with

the indexing tab in place with the corresponding slots in the legend plate and panel.

Thread the ring nut onto the switch and tighten.

Figure 28 Oil-Tight Pushbutton Switch

00111327

Oil Seal

Trim Washers

Light Module

Legend Plate

LensGuard

.06 Min

.12 Max

Indexing TabLegend Plate

Legend Plate

Ring Nut

Contact Block

Locating Nib(On Operator)

.06 Min to .25 Max Panel thickness

00111328

Oil Seal

Trim Washers

Light Module

Legend Plate or Thrust Washer

Lens

Guard

.06 Min

.12 Max

Legend Plate

Ring Nut

Contact Block(s)

Locating Nib(On Operator)

Indexing Tab OnLocating Thrust Washer

.06 Min to .25 Max Panel thickness




1.11 Clip-on bus strips.

a. When the engineering drawing shows clip-on bus strips for connector plates/backplanes, the bus strip may be installed as shown or inverted. (See Figure 29.)

Figure 29 Typical Clip-On Bus Strip

b. This procedure applies to bus strips with Link PN 1003183-01 through -07 only. After installation of the strip, a solder fillet shall be applied at the top of the electrical connection made by the backplane pin and the bus strip. Refer to Requirement 5 of MIL-HDBK-454 for general soldering guidelines (LMS 11-3, hand soldering section). (See Figure 30.)

Figure 30 Solder Fillet On Bus Strips

00111329

Standard Method Inverted

00111330

Before soldering After soldering

Solder Fillet




1.12 Miscellaneous wiring techniques.

a. The engineering drawing may specify special wiring techniques on various types of

assemblies (cabinet, chassis, panel, etc.). Two of these techniques are “Direct Wiring”

and “Wiring to be as short as possible.”

b. “Direct Wiring” (critical wire length) is point to point wiring routed via the shortest

possible and most direct path. These wires are not to be routed or dressed with the main

wire trunk and/or its branches. Except for strain relief, there will be no rework length

allowance of wire.

c. “Wiring to be as short as possible” is point–to–point wiring routed the shortest, most

direct path via the main wire trunk and/or its branches. Except for strain relief, there

will be no rework length allowance of wire.

1.13 Abrasion protection. Abrasion protection shall be provided on Link products as appropriate.

When not specified on Link engineering drawings, Manufacturing shall apply abrasion

protection in accordeance with the following. Manufacturing shall apply abrasion–protective

materials on wiring/cabling to protect against chafing due to movement. Flexible

sleeving/tubing, Link PN 261198 through 261220 or equivalent, shall be applied on

wiring/cabling subject to flexing in areas such as slide-out racks and drawers and in cases

where flexing and abrasion cannot be avoided. Channel rubber strip, Link PN 280772 through

280775 or equivalent, shall be applied to sharp edges of hardware where wiring/cabling may

come in contact with the hardware edges when flexible sleeving/tubing application to the

wiring/cabling is not feasible.

NOTE: Sleeving/tubing may be slid over or slit to fit the cabling/wiring and secured with lacing cord or

tie straps.

1.14 Slide Latch Kits. When connector slide latch kits are used on panels, up to and including 16th inch thick,

in the vertical position, install all the sliding latches as shown in Figure 31, so that the lock position is

obtained by sliding the latch downward.

Figure 31 Connector Sliding Latch Kit Installation




2. Quality Assurance Requirements

2.1 The Quality Assurance Organization shall be responsible for insuring that the requirements of

this instruction are met, and that the hardware exchange limitations specified herein are not

exceeded.

3. Preparation For Delivery (Not Applicable)

4. Notes

4.1 This instruction supersedes Binghamton Standard Shop Practices 7.40.1 and 7.7; APO Standard

Engineering Practice PA-M-2.

4.2 Parenthetical identities are for reference only.

CHANGE LOG

Ver Date Details

Rev BH

12/12/2012 Last release to LINK Process Asset Library (PAL)

2 12/01/2020 Initial release to Military Training Process Asset Library (PAL). New Template,

Removed L-3 references, & updated Change Log.

military training procedure template · 2020. 12. 18. · lms 11-13 electrical bonding...

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