operation & maintenance manual trencher

Operation & Maintenance ManualTrencher

(LT112 Trencher) S/N 045200101 & Above(MX112 Trencher) S/N 045100101 & Above(LT113 Trencher) S/N 233800101 & Above

(LT113 Trencher) S/N B3WV00101 & Above

6902550enUS (10-15) (J) Printed in U.S.A. © Bobcat Company 2015

CONTENTS

FOREWORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

SAFETY AND TRAINING RESOURCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

PREVENTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91

MACHINE SIGN TRANSLATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .137

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141

WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .147

ALPHABETICAL INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .151

REFERENCE INFORMATION

Write the correct information for YOUR Bobcat attachment in the spaces below. Always use these numbers whenreferring to your Bobcat attachment.

Bobcat CompanyP.O. Box 128Gwinner, ND 58040-0128UNITED STATES OF AMERICA

Bobcat Company EuropeDrève Richelle 167B-1410 WATERLOOBELGIUM

Attachment Serial Number

NOTES:

YOUR BOBCAT DEALER:

ADDRESS:

PHONE:

1 Trencher Operation & Maintenance Manual

FOREWORD

This Operation & Maintenance Manual was written to give the owner / operator instructions on the safe operationand maintenance of the Bobcat attachment. READ AND UNDERSTAND THIS OPERATION & MAINTENANCEMANUAL BEFORE OPERATING YOUR BOBCAT ATTACHMENT. If you have any questions, see your Bobcatdealer.

BOBCAT COMPANY IS IS0 9001 CERTIFIED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

SERIAL NUMBER LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7Attachment Serial Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

DELIVERY REPORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

ATTACHMENT IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8LT112 And LT113 Trencher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8MX112 Trencher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

FEATURES AND ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10Standard Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10Optional Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10


BOBCAT COMPANY IS IS0 9001 CERTIFIED

ISO 9001 is an international standard that specifies requirements for a quality management system that controls theprocesses and procedures which we use to design, develop, manufacture, and distribute Bobcat products.

British Standards Institute (BSI) is the Certified Registrar Bobcat Company chose to assess the company’s compliancewith the ISO 9001 at Bobcat's manufacturing facilities in Gwinner, North Dakota (U.S.A.), Pontchâteau (France), and theBobcat corporate offices (Gwinner, Bismarck, and West Fargo) in North Dakota. TÜV Rheinland is the Certified RegistrarBobcat Company chose to assess the company’s compliance with the ISO 9001 at Bobcat’s manufacturing facility inDobris (Czech Republic). Only certified assessors, like BSI and TÜV Rheinland, can grant registrations.

ISO 9001 means that as a company we say what we do and do what we say. In other words, we have establishedprocedures and policies, and we provide evidence that the procedures and policies are followed.

CALIFORNIA PROPOSITION 65 WARNING

Diesel engine exhaust and some of its constituents are known to the state of California to cause cancer, birth defects and other

reproductive harm.

SAFETY


SERIAL NUMBER LOCATION

Attachment Serial Number

Figure 1

Figure 2

Always use the serial number of the trencher whenrequesting service information or when ordering parts.Early or later models (identification made by serialnumber) may use different parts, or it may be necessaryto use a different procedure in doing a specific serviceoperation [Figure 1] or [Figure 2].

DELIVERY REPORT

Figure 3

The delivery report [Figure 3] contains a list of items thatmust be explained or shown to the owner or operator bythe dealer when the Bobcat trencher is delivered.

The delivery report must be reviewed and signed by theowner or operator and the dealer.

P105351

LT112 & LT113

P105352

MX112

NA7494


ATTACHMENT IDENTIFICATION

LT112 And LT113 Trencher

P-41731A

STEP

AUGER

DIGGING CHAIN

MOUNTING FRAME

QUICK COUPLERS

TRENCH CLEANER SHOE


ATTACHMENT IDENTIFICATION (CONT’D)

MX112 Trencher

P-41719

DIGGING CHAIN

HYDRAULIC MOTOR

X-CHANGE™ MOUNT

AUGER

TRENCH CLEANER SHOE


FEATURES AND ACCESSORIES

Standard Items

The trencher is equipped with the following Standarditems:

• Large Diameter Auger With A Tapered Design

Optional Items

Below is a list of Options available for your trencher. Seeyour Bobcat dealer for other available Options andAccessories.

• Single Standard Pattern Chain And Widths

• Double Standard Pattern Chain And Widths


SAFETY AND TRAINING RESOURCES

SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13Safe Operation Is The Operator’s Responsibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13Safe Operation Needs A Qualified Operator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13Use Safety Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14Call Before You Dig . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14Avoid Silica Dust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

FIRE PREVENTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15Hydraulic System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15Fueling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15Spark Arrester Exhaust System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15Welding And Grinding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16Fire Extinguishers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

PUBLICATIONS AND TRAINING RESOURCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

ATTACHMENT SIGNS (DECALS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18LT112 And LT113 Trencher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18MX112 Trencher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19


SAFETY INSTRUCTIONS

Safe Operation Is The Operator’s Responsibility

WARNINGOperator must have instructions before operating themachine. Untrained operators can cause injury ordeath.

W-2001-0502

IMPORTANTThis notice identifies procedures which must befollowed to avoid damage to the machine.

I-2019-0284

DANGERThe signal word DANGER on the machine and in themanuals indicates a hazardous situation which, if notavoided, will result in death or serious injury.

D-1002-1107

WARNINGThe signal word WARNING on the machine and in themanuals indicates a potentially hazardous situationwhich, if not avoided, could result in death or seriousinjury.

W-2044-1107

The Bobcat machine and attachment must be in goodoperating condition before use.

Check all of the items on the Bobcat Service ScheduleDecal under the 8-10 hour column or as shown in theOperation & Maintenance Manual.

Safe Operation Needs A Qualified Operator

For an operator to be qualified, he or she must not usedrugs or alcoholic drinks which impair alertness orcoordination while working. An operator who is takingprescription drugs must get medical advice to determineif he or she can safely operate a machine and theattachment.

A Qualified Operator Must Do The Following:

Understand the Written Instructions, Rules andRegulations

• The written instructions from Bobcat Companyinclude the Delivery Report, Operation &Maintenance Manual, Operator’s Handbook, SafetyManual and machine signs (decals).

• Check the rules and regulations at your location. Therules may include an employer’s work safetyrequirements. Regulations may apply to local drivingrequirements or use of a Slow Moving Vehicle (SMV)emblem. Regulations may identify a hazard such as autility line.

Have Training with Actual Operation

• Operator training must consist of a demonstration andverbal instruction. This training is given by yourBobcat dealer before the product is delivered.

• The new operator must start in an area withoutbystanders and use all the controls until he or she canoperate the machine and attachment safely under allconditions of the work area. Always fasten seat beltbefore operating.

Know the Work Conditions

• Know the weight of the materials being handled.Avoid exceeding the machine load capacities.Material which is very dense will be heavier than thesame volume of less dense material. Reduce the sizeof load if handling dense material.

• The operator must know any prohibited uses or workareas, for example, he or she needs to know aboutexcessive slopes.

• Know the location of any underground lines. Call localutilities or the TOLL FREE phone number found in theCall Before You Dig section of this manual.

• Wear tight fitting clothing. Always wear safety glasseswhen doing maintenance or service. Safety glasses,respiratory equipment, hearing protection, SpecialApplications Kits or a Front Window Guard arerequired for some work. See your Bobcat dealerabout Bobcat safety equipment for your machine.

SI ATT-0913

This symbol with a warning statement means:“Warning, be alert! Your safety is involved!”Carefully read the message that follows.

Safety Alert Symbol


SAFETY INSTRUCTIONS (CONT’D)

Use Safety Rules

• Read and follow instructions in the machine and theattachment’s Operation & Maintenance Manualbefore operating.

• Check for underground lines before operatingattachment (if applicable).

• In addition to the design and configuration ofequipment, hazard control and accident preventionare dependent upon the awareness, concern,prudence and proper training of personnel involved inthe operation, transport, maintenance and storage ofequipment.

• Check that the Bob-Tach™ levers are in the lockedposition and the wedges are fully engaged into theholes of the attachment (if applicable).

• Check that the attachment is securely fastened to themachine.

• Make sure all the machine controls are in theNEUTRAL position before starting the machine.

• Operate the attachment only from the operator’sposition.

• Operate the attachment according to the Operation &Maintenance Manual.

• When learning to operate the attachment, do it at aslow rate in an area clear of bystanders.

• DO NOT permit personnel to be in the work areawhen operating the machine and attachment.

• The attachment must be used ONLY on approvedmachines. See your Bobcat dealer for updated list ofapproved attachments for each machine model.

• DO NOT modify equipment or add attachments thatare not approved by the manufacturer.

• DO NOT make any adjustments or repairs on themachine or attachment while the engine is running.

• Keep shields and guards in place. Replace ifdamaged.

Call Before You Dig

Call Before You DigDial 811 (USA Only)

1-888-258-0808 (USA & Canada)

When you call, you will be directed to a location in yourstate / province, or city for information about buried lines(telephone, cable TV, water, sewer, gas, etc.).

Avoid Silica Dust

Cutting or drilling concrete containing sand or rockcontaining quartz may result in exposure to silica dust.Do not exceed Permissible Exposure Limits (PEL) tosilica dust as determined by OSHA or other job site Rulesand Regulations. Use a respirator, water spray or othermeans to control dust. Silica dust can cause lung diseaseand is known to the state of California to cause cancer.

Sl ATT-0913


FIRE PREVENTION

Maintenance

The machine and some attachments have componentsthat are at high temperatures under normal operatingconditions. The primary source of high temperatures isthe engine and exhaust system. The electrical system, ifdamaged or incorrectly maintained, can be a source ofarcs or sparks.

Flammable debris (leaves, straw, etc.) must be removedregularly. If flammable debris is allowed to accumulate, itcan cause a fire hazard. Clean often to avoid thisaccumulation. Flammable debris in the enginecompartment is a potential fire hazard.

The operator’s area, engine compartment and enginecooling system must be inspected every day and cleanedif necessary to prevent fire hazards and overheating.

All fuels, most lubricants and some coolant mixtures areflammable. Flammable fluids that are leaking or spilledonto hot surfaces or onto electrical components cancause a fire.

Operation

Do not use the machine where exhaust, arcs, sparks orhot components can contact flammable material,explosive dust or gases.

Electrical

Check all electrical wiring and connections for damage.Keep the battery terminals clean and tight. Repair orreplace any damaged part or wires that are loose orfrayed.

Battery gas can explode and cause serious injury. Usethe procedure in the Operation & Maintenance Manualfor connecting the battery and for jump starting. Do notjump start or charge a frozen or damaged battery. Keepany open flames or sparks away from batteries. Do notsmoke in battery charging area.

Hydraulic System

Check hydraulic tubes, hoses and fittings for damageand leakage. Never use open flame or bare skin to checkfor leaks. Hydraulic tubes and hoses must be properlyrouted and have adequate support and secure clamps.Tighten or replace any parts that show leakage.

Always clean fluid spills. Do not use gasoline or dieselfuel for cleaning parts. Use commercial nonflammablesolvents.

Fueling

Stop the engine and let it cool before adding fuel. Nosmoking! Do not refuel a machine near open flames orsparks. Fill the fuel tank outdoors.

Ultra Low Sulfur Diesel (ULSD) poses a greater staticignition hazard than earlier diesel formulations withhigher Sulfur content. Avoid death or serious injury fromfire or explosion. Consult with your fuel or fuel systemsupplier to ensure the delivery system is in compliancewith fueling standards for proper grounding and bondingpractices.

Starting

Do not use ether or starting fluids on any engine that hasglow plugs. These starting aids can cause explosion andinjure you or bystanders.

Use the procedure in the Operation & MaintenanceManual for connecting the battery and for jump starting.

Spark Arrester Exhaust System

The spark arrester exhaust system is designed to controlthe emission of hot particles from the engine and exhaustsystem, but the muffler and the exhaust gases are stillhot.

Check the spark arrester exhaust system regularly tomake sure it is maintained and working properly. Use theprocedure in the Operation & Maintenance Manual forcleaning the spark arrester muffler (if equipped).

Sl ATT-0913


FIRE PREVENTION (CONT’D)

Welding And Grinding

Always clean the machine and attachment, disconnectthe battery, and disconnect the wiring from the Bobcatcontrollers before welding. Cover rubber hoses, batteryand all other flammable parts. Keep a fire extinguishernear the machine when welding.

Have good ventilation when grinding or welding paintedparts. Wear dust mask when grinding painted parts.Toxic dust or gas can be produced.

Dust generated from repairing nonmetallic parts such ashoods, fenders or covers can be flammable or explosive.Repair such components in a well ventilated area awayfrom open flames or sparks.

Fire Extinguishers

Know where fire extinguishers and first aid kits arelocated and how to use them. Inspect the fireextinguisher and service the fire extinguisher regularly.Obey the recommendations on the instructions plate.

Sl ATT-0913


PUBLICATIONS AND TRAINING RESOURCES

The following publications are also available for yourBobcat attachment. You can order from your Bobcatdealer.

For the latest information on Bobcat products and theBobcat Company, visit our web site at www.bobcat.com

Complete instructions on the correct operation andthe routine maintenance of the Bobcat attachment.

OPERATION &MAINTENANCEMANUAL

6902550enUS

Complete maintenance and overhaul instructions foryour Bobcat attachment.

SERVICEMANUAL

6900899

Complete maintenance and overhaul instructions foryour trencher chain.

TRENCHER CHAINPATTERN MANUAL

6903853


ATTACHMENT SIGNS (DECALS)

LT112 And LT113 Trencher

Follow the instructions on all the Attachment Signs (Decals) that are on the attachment. Replace any damaged attachmentsigns and be sure they are in the correct locations. Attachment signs are available from your Bobcat attachment dealer.

P-41731A

6815993 (2)

6579914 (2)

65759656657351


ATTACHMENT SIGNS (DECALS) (CONT’D)

MX112 Trencher

Follow the instructions on all the Attachment Signs (Decals) that are on the attachment. Replace any damaged attachmentsigns and be sure they are in the correct locations. Attachment signs are available from your Bobcat attachment dealer.

P-41719

6579914 (2)

65759656657351


OPERATING INSTRUCTIONS

DAILY INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23Attachment Mounting Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23Bob-Tach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24Common Industry Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25X-Change™ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26Chain Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

OPERATING PROCEDURE WITH LOADERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27Approved Loader Models And Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27Entering And Exiting The Loader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30Hydraulic Quick Couplers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33Control Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34Operation With The Loader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

OPERATING PROCEDURE WITH EXCAVATORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38Approved Excavator Models And Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38Entering And Exiting the Excavator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41Hydraulic Quick Couplers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56Control Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57Operation With The Excavator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

OPERATING PROCEDURE WITH MINI TRACK LOADERS . . . . . . . . . . . . . . . . . . . . . . . . . .69Approved Mini Track Loader Models And Requirements . . . . . . . . . . . . . . . . . . . . . . . . . .69Entering And Leaving The Operator’s Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73Hydraulic Quick Couplers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76Control Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77Operation With The Mini Track Loader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86

LIFTING THE ATTACHMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87

TRANSPORTING THE ATTACHMENT ON A TRAILER . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88Fastening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

TRANSPORTING THE ATTACHMENT AND MACHINE ON A TRAILER . . . . . . . . . . . . . . . .90Loading And Fastening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90


DAILY INSPECTION

Attachment Mounting Frame

Figure 4

Bob-Tach: Inspect the Bob-Tach wedge mounts (Item 1),mounting flange (Item 2) [Figure 4] and all welds on thetrencher for wear and damage each time the trencher isremoved from the machine.

Figure 5

Common Industry Interface: Inspect the CommonIndustry Interface mounting holes (Item 1), mountingflange (Item 2) [Figure 5] and all welds on the trencherfor wear and damage each time the trencher is removedfrom the machine.

Frequently inspect the trencher to ensure that allcomponents are secure and that all bolts and nuts arethoroughly tightened.

P-41729

2

1

P1240381

2


DAILY INSPECTION (CONT’D)

Bob-Tach

Hand Lever Bob-Tach

WARNINGAVOID INJURY OR DEATH

The Bob-Tach wedges must extend through the holesin the attachment mounting frame. Levers must befully down and locked. Failure to secure wedges canallow attachment to come off.

W-2715-0208

Figure 6

Push down on the Bob-Tach levers until they are fullyengaged in the locked position [Figure 6] (wedges fullyextended through the attachment mounting frame holes).

The levers and wedges must move freely [Figure 6].

Figure 7

The wedges must extend through the holes in theattachment mounting frame, securely fastening theattachment to the Bob-Tach [Figure 7].

NOTE: If the wedge does not contact the lower edgeof the hole, the attachment will be loose andcan come off the Bob-Tach.

Inspect the mounting frame on the machine. (See themachine's Operation & Maintenance Manual forinspecting the Bob-Tach). Replace any parts that aredamaged, bent or missing. Keep all fasteners tight. Lookfor cracked welds. Contact your Bobcat dealer for repairor replacement parts.

Lubricate the wedges. (See the machine’s Operation &Maintenance Manual for the correct procedure.)

P-41502A

Bob-Tach wedge must contactthe lower edge of theattachment mounting framehole.

P-79780



Common Industry Interface

WARNINGThe Common Industry Interface locking pins mustextend through the holes in attachment frame.Levers must be fully down and locked. Failure tosecure the locking pins can allow attachment tocome off and cause serious injury or death.

W-2996-1015

Figure 8

Push down on the locking levers until they are fullyengaged in the locked position [Figure 8] (pins fullyextended through the attachment mounting frame holes).

The levers and pins must move freely [Figure 8].

Figure 9

The pins (Item 1) must extend through the holes in theattachment mounting frame (Item 2), [Figure 9] securelyfastening the attachment to the interface.

Inspect the mounting frame on the machine. (See themachine's Operation & Maintenance Manual forinspecting the Common Industry Interface). Replace anyparts that are damaged, bent or missing. Keep allfasteners tight. Look for cracked welds. Contact yourBobcat dealer for repair or replacement parts.

Lubricate the locking pins. (See the machine’s Operation& Maintenance Manual for the correct procedure.)

P124033

P124037P124036

11

2



X-Change™

Figure 10

Inspect the X-Change mount (Item 1) [Figure 10] and allwelds on the trencher for wear and damage each timethe trencher is removed from the machine.

Frequently inspect the trencher to ensure that allcomponents are secure and that all bolts and nuts arethoroughly tightened.

Figure 11

Inspect the X-Change for wear or damage. Inspect the X-Change pins (Item 1) and hooks (Item 2) [Figure 11] (onthe attachment) and all hardware for wear or damage.

Repair or replace damaged parts.

Chain Guide

Figure 12

Inspect the top and bottom chain guide (Item 1)[Figure 12] for wear and damage.

P-41720

1

P-27892

2

1

P-41726

1


OPERATING PROCEDURE WITH LOADERS

Approved Loader Models And Requirements

Figure 13

X = Approved

The chart [Figure 13] shows the approved trenchermodels for each loader model.

The warranty is void if this attachment is used on anon-approved carrier. See your Bobcat dealer for anupdated list of approved carriers.

WARNINGNever use attachments or buckets which are notapproved by the Bobcat Company. Attachments andbuckets for safe loads of specified densities areapproved for each model. Unapproved attachmentsand buckets can cause injury or death.

W-2662-0108

Figure 14

The loader must be equipped with front auxiliaryhydraulics [Figure 14] for proper operation of thetrencher. See your Bobcat dealer for available kits.


LOADER MODEL

LT112 LT113

463 X XS70 X X

P19289


OPERATING PROCEDURE WITH LOADERS (CONT’D)

Entering And Exiting The Loader


When operating the machine:• Keep the seat belt fastened snugly.• The seat bar must be lowered.• Keep your feet on the pedal controls or footrests

and hands on the controls.W-2261-0909

Entering

Figure 15

Use the attachment steps, grab handles and safetytreads (on the loader lift arms and frame) to get on andoff the loader [Figure 15].

Figure 16

Enter the loader. Fasten the seat belt and adjust it so thebuckle is centered between your hips [Figure 16].

Figure 17

Lower the seat bar and engage the parking brake[Figure 17].

Put the foot pedals or hand controls in NEUTRALposition.

NOTE: Keep your hands on the steering levers andyour feet on the foot pedals (or footrests)while operating the loader.

See the loader’s Operation & Maintenance Manual andOperator’s Handbook for detailed information onoperating the loader.

P-41735

P16038

P-81992



Entering And Exiting The Loader (Cont’d)

Exiting

Lower the lift arms and put the attachment flat on theground.

Stop the engine and engage the parking brake.

Lift the seat bar and make sure the lift and tilt functionsare deactivated.

Remove the key.

Exit the loader.


Before you leave the operator’s position:• Lower the lift arms, put the attachment flat on the

ground.• Stop the engine and engage the parking brake.• Move all pedals, handles, joysticks, and other

controls until they are LOCKED or in theNEUTRAL position.

SEE THE MACHINE OPERATION & MAINTENANCEMANUAL FOR MORE INFORMATION.

W-2722-0208



Installation

Hand Lever Bob-Tach

NOTE: The illustrations and instructions providedexplain how to install a bucket attachment onto a loader. Follow these same instructions ifyou are installing different attachments suchas a grapple, tiller, combo bucket, etc.

The attachment mounting frame for theattachment has a top flange that is designedto receive the top edge of the Bob-Tach andthe lower part of the frame is designed toreceive the Bob-Tach wedges.

WARNINGWarnings on the machine and in the manuals are foryour safety. Failure to obey warnings can causeserious injury or death.

W-2744-0608

Always inspect the loader’s Bob-Tach and the attachmentmounting frame before installation. See the loader’sOperation & Maintenance Manual. (See DAILYINSPECTION on Page 23.)

Figure 18

Pull the Bob-Tach levers up until they are fully raised(wedges fully raised) [Figure 18].

Enter the loader. (See Entering And Exiting The Loaderon Page 28.)

Start the engine, press the PRESS TO OPERATELOADER button and release the parking brake.

Figure 19

Lower the lift arms and tilt the Bob-Tach forward.

Drive the loader slowly forward until the top edge of theBob-Tach is completely under the top flange of theattachment mounting frame [Figure 19].

NOTE: Be sure the Bob-Tach levers do not hit theattachment.

Figure 20

Tilt the Bob-Tach backward until the attachment is slightlyoff the ground [Figure 20]. This will cause theattachment mounting frame to fit up against the front ofthe Bob-Tach.

NOTE: When leaving the operator's seat to install anattachment, tilt the attachment until it isslightly off the ground.

Stop the engine and exit the loader. (See Entering AndExiting The Loader on Page 28.)

P-41502

P-41504

P-41505



Installation (Cont’d)

Hand Lever Bob-Tach (Cont’d)


Before you leave the operator’s seat:• Lower the lift arms and put the attachment flat on

the ground.• Stop the engine.• Engage the parking brake.• Raise the seat bar.• Move all controls to the NEUTRAL / LOCKED

position to make sure the lift, tilt and tractiondrive functions are deactivated.

The seat bar system must deactivate these functionswhen the seat bar is up. See your Bobcat dealer forservice if controls do not deactivate.

W-2463-1110

Figure 21

Push down on the Bob-Tach levers until they are fullyengaged in the locked position [Figure 21] (wedges fullyextended through the attachment mounting frame holes).

Figure 22

Both levers must contact the frame as shown whenlocked [Figure 22].

If both levers do not engage in the locked position, seeyour Bobcat dealer for maintenance.



W-2715-0208

Figure 23


Connect auxiliary hydraulic hoses (if applicable). (SeeHydraulic Quick Couplers on .)

P-41502A

P-79781

FRAME CONTACT POINTS

Bob-Tach wedge mustcontact the lower edge of theattachment mounting framehole.

P-79780



Installation (Cont'd)

For First Time Installation

New attachments and new loaders are factory equippedwith flush face couplers. If installing an attachmentequipped with poppet style couplers, the attachmentcouplers will have to be changed to match the loader.See your Bobcat dealer for parts information.

IMPORTANT• Thoroughly clean the quick couplers before

making connections. Dirt can quickly damage thesystem.

• Contain and dispose of any oil leakage in anenvironmentally safe manner.

I-2278-0608

With the loader engine off and using the hose guides (ifequipped), route the attachment hydraulic hoses to theloader. Connect the attachment hydraulic quick couplersto the loader couplers. (See Hydraulic Quick Couplers onPage 33.)

Check that the attachment hydraulic hoses are nottwisted or contacting any moving parts of the attachmentor loader.

NOTE: It may be necessary to loosen the quickcouplers on the attachment hydraulic hosesto remove any twists in the hoses.


Wear safety glasses to prevent eye injury when anyof the following conditions exist:• When fluids are under pressure.• Flying debris or loose material is present.• Engine is running.• Tools are being used.

W-2019-0907

Loosen the quick coupler connections on the attachmenthydraulic hoses while connected to the loader. Do notremove the quick couplers.

Rotate the attachment hydraulic hoses as needed so thehoses are not twisted or contacting any moving parts ofthe loader or attachment.

Tighten the attachment quick coupler connections whilethe couplers are still connected to the loader. This willhelp hold the hydraulic hoses in position while tightening.

Tighten the quick couplers connections to 63 N•m (46 ft-lb) torque before starting the loader.


Start the engine and release the parking brake (ifequipped).

Engage auxiliary hydraulics. (See the loader’s Operation& Maintenance Manual and Operator’s Handbook forcorrect procedure.)


Diesel fuel or hydraulic fluid under pressure canpenetrate skin or eyes, causing serious injury ordeath. Fluid leaks under pressure may not be visible.Use a piece of cardboard or wood to find leaks. Donot use your bare hand. Wear safety goggles. If fluidenters skin or eyes, get immediate medical attentionfrom a physician familiar with this injury.

W-2072-0807

Check the attachment hydraulic quick couplerconnections for leaks.



Hydraulic Quick Couplers




I-2278-0608

New attachments and new loaders are factory equippedwith flush face couplers. If installing an attachmentequipped with poppet style couplers, the attachmentcouplers will have to be changed to match the loader.See your Bobcat dealer for parts information.

NOTE: Make sure the quick couplers are fullyengaged. If the quick couplers do not fullyengage, check to see that the couplers are thesame size and type.

Figure 24

WARNINGAVOID BURNS

Hydraulic fluid, tubes, fittings and quick couplerscan get hot when running machine and attachments.Be careful when connecting and disconnecting quickcouplers.

W-2220-0396

To Connect:

Remove any dirt or debris from the surface of both themale and female couplers, and from the outside diameterof the male coupler. Visually check the couplers forcorroding, cracking, damage, or excessive wear. If any ofthese conditions exist, the coupler(s) must be replaced[Figure 24].

Install the male coupler into the female coupler. Fullconnection is made when the ball release sleeve slidesforward on the female coupler.

NOTE: Check that the attachment hydraulic hosesare not twisted or contacting any movingparts of the attachment or loader. (See ForFirst Time Installation on Page 32.) for properadjustment.

To Disconnect:

Relieve hydraulic pressure. (See the loader’s Operation &Maintenance Manual and Operator’s Handbook forcorrect procedure.)

Push the couplers together, retract the sleeve on thefemale coupler until the couplers disconnect.

P19289



Control Functions

WARNINGKeep all bystanders 6 m (20 ft) away from equipmentwhen operating. Contact with moving parts, a trenchcave-in or flying objects can cause injury or death.

W-2119-0910


Start the engine and release the parking brake.

Engage the auxiliary hydraulics. (See the loader’sOperation & Maintenance Manual for correct procedure.)

Figure 25

To start the trencher, move the right steering lever (Item1) to the right. To stop the trencher, move the right steerlever (Item 1) [Figure 25] to the center position.

Continuous Flow

Move the right steer lever (Item 1) fully to the right intothe DETENT position for continuous hydraulic flow to thetrencher. To Stop the trencher, move the right steer lever(Item 1) [Figure 25] to the center position.

P-21450

1



Operation With The Loader

Manual Side Shift

Always park on flat level ground.

Lower the trencher until it is slightly off the ground.

Stop the engine and exit the loader. (See Entering AndExiting The Loader on Page 28.)


Before you leave the operator’s seat: • Lower the lift arms, put the attachment flat on the

ground.• Stop the engine.• Engage the parking brake.• Raise seat bar, move pedals until both lock.

W-2045-1086

Figure 26

Loosen the two bolts (Item 1) from both the left and rightblocks (Item 2) [Figure 26] holding the trencher in thedesired position.

Figure 27

Move the trencher to the desired position [Figure 27].

Slide the blocks (Item 2) [Figure 26] against the trencherframe, then tighten the bolts to 34 - 38 N•m (25 - 28 ft-lb)torque.

P-41722

2

P-41525

21

1

1

1

P-41736



Operation With The Loader (Cont’d)

Loader Trenching Procedure

DANGERAVOID INJURY OR DEATH

Bystanders must stay 6 m (20 ft) away from chain andauger.

D-1019-0910


Check for underground utility lines before digging.W-2120-0788


Figure 28

Raise the lift arms and tilt the trencher forward until thetrencher is at a 20 - 25° angle to the ground [Figure 28].

Start the trencher. (See Control Functions on Page 34.)

Lower the lift arms until the end of the attachmentcontacts the ground and starts digging the trench.Continue to lower the lift arms while the trencher isdigging until the lift arms are fully lowered.

Slowly tilt the Bob-Tach into the ground until the trencherboom is approximately at a 60° angle to the ground.

When the attachment reaches this angle, it is at the bestdigging position.

Drive backward and continue trenching until the desiredlength of the trench is reached.

P-41737



Removal

Hand Lever Bob-Tach

Lower the lift arms and put the attachment flat on theground. Lower or close the hydraulic equipment (ifequipped).

NOTE: In muddy conditions or to prevent theattachment from freezing to the ground, putthe attachment on planks or blocks beforeremoving the attachment from the loader.

Stop the engine and release auxiliary hydraulic pressure(if applicable). (See the loader’s Operation &Maintenance Manual and Operator’s Handbook forcorrect procedure.)

Exit the loader. (See Entering And Exiting The Loader onPage 28.)


Before you leave the operator’s seat:• Lower the lift arms and put the attachment flat on

the ground.• Stop the engine.• Engage the parking brake.• Raise the seat bar.• Move all controls to the NEUTRAL / LOCKED

position to make sure the lift, tilt and tractiondrive functions are deactivated.

The seat bar system must deactivate these functionswhen the seat bar is up. See your Bobcat dealer forservice if controls do not deactivate.

W-2463-1110

Disconnect auxiliary hydraulic hoses (if applicable). (SeeHydraulic Quick Couplers on Page 33.)

Figure 29

Pull the Bob-Tach levers up [Figure 29] until they arefully raised (wedges fully raised).

WARNINGBob-Tach levers have spring tension. Hold levertightly and release slowly. Failure to obey warningcan cause injury.

W-2054-1285


Start the engine, press the PRESS TO OPERATELOADER button and release the parking brake.

Figure 30

Tilt the Bob-Tach forward and drive the loader backward,away from the attachment [Figure 30].

P-41502B

P-41504A


OPERATING PROCEDURE WITH EXCAVATORS

Approved Excavator Models And Requirements

Figure 31

X = Approved

The chart [Figure 31] lists the excavator modelsapproved for use with the trencher.

Warranty on this attachment is void if used on a non-approved carrier. See your Bobcat dealer for acurrent list of approved carriers.


W-2662-0108

Figure 32

Figure 33

The excavator must be equipped with front auxiliaryhydraulics [Figure 32] or [Figure 33].

NOTE: The male flush face couplers are located onthe right side of the arm (shown) [Figure 33],the female couplers are located on the leftside of the arm (E60 excavators only).

EXCAVATOR MODELS

MX112

331 X331E X334 X335 X337 X341 X430 X435 XE32 XE35 XE42 XE45 XE50 XE55 XE60 X

P-49107

P-89978

E60 Machines Only


OPERATING PROCEDURE WITH EXCAVATORS (CONT’D)

Entering And Exiting the Excavator

Entering


When operating the machine:• Keep the seat belt fastened snugly.• The control console(s) must be lowered.• Keep your feet and arms inside the cab.

W-2777-1208

Figure 34

Use the grab handles, tracks the and safety treads toenter and exit the excavator [Figure 34].

Figure 35

Fasten the seat belt snugly. Adjust the seat belt so thatthe belt is over the operator’s hips [Figure 35].

Figure 36

Figure 37

Lower the left control console [Figure 36] and[Figure 37] before starting the engine.

P-86319

P-86323

P11442

P-86320

E60 Machine Only



Entering And Exiting the Excavator (Cont’d)

Entering (Cont’d)

NOTE: There is a control lock switch in the leftconsole which deactivates the hydrauliccontrol levers / steering wheel (joysticks andtraction system) when the control consolelock lever is raised. The console must be inthe locked down position for the hydrauliccontrol levers (joysticks and traction system)to operate.

NOTE: If the control lock switch does not deactivatethe control levers when the console lock leveris raised, see your Bobcat dealer for service.

See the excavator’s Operation & Maintenance Manualand Operator’s Handbook for detailed information onoperating the excavator.

Exiting

Lower the work equipment to the ground.

Lower the blade to the ground.

Figure 38

Figure 39

Lift up the lever (Item 1) [Figure 38] and [Figure 39] torelease and raise the control console.

Stop the engine and remove the key.

Exit the excavator.


Before leaving the machine:• Lower the work equipment to the ground.• Lower the blade to the ground.• Stop the engine and remove the key.

W-2196-0595

P11443

1

P-86320

1

E60 Machine Only



Installation

Bolt-On X-Change

The trencher will need to be rolled over before it can bemounted to the excavator.

Remove the trench cleaner before rolling the trencherover.

NOTE: Secure the hose so they do not get pinched orcut while rolling the trencher over.

Figure 40

Attach a chain (Item 1) [Figure 40] to the mountingframe.

NOTE: Use chains that are in good condition and ofadequate size to lift the attachment.

Figure 41

Roll the trencher to the flat side (the opposite side of theauger) [Figure 41]. Use a hoist to assist in rolling thetrencher over.

Figure 42

Continue to roll the trencher over so it lays as shown[Figure 42].

Remove the chain.

Enter the excavator. (See Entering And Exiting theExcavator on Page 39.)

Position the excavator in front of the trencher.

Figure 43

Move the boom and arm until the X-Change pins (Item 1)are under the hooks (Item 2) [Figure 43] on the trencherframe.

P-41744

1

P-41745

P-41746

P-27892

2

1




Bolt-On X-Change (Cont’d)

Figure 44

Raise the boom slightly to engage the pins (Item 1) intothe hooks (Item 2) [Figure 44].

Figure 45

Extend the bucket cylinder until the X-Change (Item 1)[Figure 45] contacts the trencher frame and raises thetrencher off of the ground.

Figure 46

Lower the boom until the hooks (Item 1) of the trencherframe disengage the pins (Item 2) of the X-Change andthe plate engages the crossmember (Item 3) [Figure 46]of the trencher frame.

Stop the excavator.

Exit the excavator. (See Entering And Exiting theExcavator on Page 39.)

Figure 47

Install the bolt on plate (Item 1) [Figure 47] to the X-change.

P-27893

2

1

P-278941

P-27896

2

1

3

P-27902

1





Figure 48

Install the two bolts (Item 1) into the plate (Item 2)[Figure 48].

NOTE: DO NOT over-torque bolts. Over-torquing maycause bolt or thread damage and could resultin bolts breaking during operation.

Installation: Tighten the bolts to 170 - 190 N•m (125 -140 ft-lb) torque.

NOTE: Check the bolt torque after every eight hoursof operation.

X-Change System




Figure 49



Figure 50


P-27903

2

1

P-41744

1

P-41745




X-Change System (Cont’d)

Figure 51


Remove the chain.


Position the excavator in front of the trencher.

Retract the bucket cylinder completely to reset the X-Change latch.

Figure 52

Move the boom and arm until the X-Change pins (Item 1)are under the hooks (Item 2) [Figure 52] on the trencherframe.

Figure 53

Raise the boom slightly to engage the pins (Item 1) intothe hooks (Item 2) [Figure 53].

Figure 54

Extend the bucket cylinder until the X-Change (Item 1)[Figure 54] contacts the trencher frame and raises thetrencher assembly off of the ground.

P-41746

P-41747

1

2

P-27893

1

2

P-27894

1





Figure 55

Lower the excavator boom until the hooks (Item 1) of thetrencher frame disengage the pins (Item 2) of the X-Change and the plate engages the crossmember (Item 3)[Figure 55] locking the trencher frame to the X-Change.

Pin-On X-Change

Figure 56

Inspect the pin (Item 1) [Figure 56] for wear or damage.Replace the pin as needed.

Apply a light coat of grease to the ends of the pin (Item 2)[Figure 56].




Figure 57



P-27896

1

2

3

P-49705

2 1 2

P-41744

1




Pin-On X-Change (Cont’d)

Figure 58


Figure 59


Remove the chain.


NOTE: Installation of the bucket is shown. Theprocedure is the same for other attachments.Disconnect any hydraulic lines that areoperated by hydraulic power before removingany attachments.


Never use attachments or buckets which are notapproved by Bobcat Company. Buckets andattachments for safe loads of specified densities areapproved for each model. Unapproved attachmentscan cause injury or death.

W-2052-0907

Figure 60

Start the engine and move the arm toward theattachment [Figure 60].

P-41745

P-41746P-49836





Figure 61

Raise the boom until the pins (Item 1) engage the hooks(Item 2) [Figure 61] on the attachment.

Figure 62

Raise the boom and extend the bucket cylinder until theX-Change contacts the attachment back [Figure 62].

With the arm vertical, lower the boom until the hooks(Item 1) of the attachment engage the X-Change pins(Item 2) and the plate (Item 3) [Figure 62] fully engagesinto the attachment crossmember.


W-2119-0910

P-49835

2

1

P-49837

1

23





Figure 63

Stop the engine. Turn the start key to the ON position andmove both hydraulic control levers to relieve hydraulicpressure.

Drive the pin (Item 1) [Figure 63] through the attachmentmount and X-Change.

Figure 64

Install the retainer pin (Item 1) [Figure 64].

Check for proper installation.

Lift the attachment and fully extend and retract the bucketcylinder.

P-49706

1

P-49708

1




Hydraulic X-Change




Figure 65



Figure 66


Figure 67


Remove the chain.


P-41744

1

P-41745

P-41746




Hydraulic X-Change (Earlier Models)

NOTE: Installation of the bucket is shown. Theprocedure is the same for other attachments.Disconnect any hydraulic lines that areoperated by hydraulic power before removingany attachments (breaker, direct drive auger,etc.).



W-2052-0907

Figure 68

Start the engine.

Swing the excavator arm fully to the left [Figure 68] (forbetter operator visibility when connecting attachments).

Figure 69

Press and hold the X-Change switch (Item 1) [Figure 69]to the right to fully retract the hydraulic pins.

P-69006

P-64256A

1




Hydraulic X-Change (Earlier Models) (Cont’d)

Figure 70

Move the arm toward the attachment [Figure 70].

Figure 71

Raise the boom until the X-Change pins (Item 1) engagethe attachment hooks (Item 2) [Figure 71] on the bucket.

Figure 72

Raise the boom and extend (curl in) the bucket cylinderuntil the X-Change contacts the back of the attachment[Figure 72].

With the arm vertical, lower the boom until the hooks(Item 1) of the bucket disengage the X-Change pins (Item2) and the plate (Item 3) [Figure 72] fully engages intothe bucket crossmember.


W-2119-0910

Figure 73

Press and hold the X-Change switch (Item 1) [Figure 73]to the left and FULLY EXTEND the hydraulic pins.

P-71986

P-71989

1

2

P-71993

1

23

P-64256A

1





Figure 74

Check that both hydraulic pins (Item 1) [Figure 74] arefully engaged to secure the attachment.

WARNINGBoth hydraulic pins must be fully extended throughthe attachment mounting holes and locked with bothretainer pins and clips. Failure to fully engage andlock hydraulic pins can allow attachment to come offand cause serious injury or death.

W-2507-0706

Figure 75

Figure 76

Stop the engine and exit the excavator. (See EnteringAnd Exiting the Excavator on Page 39.)

Install retainer pin (Item 1) and clips (Item 2) [Figure 75]and [Figure 76] into each hydraulic pin (both sides).

WARNINGBoth hydraulic pins must be fully extended throughthe attachment mounting holes and locked with bothretainer pins and clips. Failure to fully engage andlock hydraulic pins can allow attachment to come offand cause serious injury or death.

W-2507-0706

P-69010

1

P-719992

1

2

P-71999A

1

2

2

1

2

21

2

2




Hydraulic X-Change (Later Models)

NOTE: Installation and removal of the bucket isshown. The procedure is the same for otherattachments. Disconnect any hydraulic linesthat are operated by hydraulic power beforeremoving any attachments (breaker, auger,etc.).



W-2052-0907


Both hydraulic pins must be fully extended throughthe attachment mounting holes. Failure to fullyengage the hydraulic pins can allow attachment tocome off.

W-2935-0512

Figure 77

Start the engine.

Swing the excavator arm fully to the left [Figure 77] (forbetter operator visibility when connecting attachments).

Figure 78

Press and hold the X-Change switch (Item 1) [Figure 78]to the right (IN) to fully retract the hydraulic pins.

Figure 79

Move the arm toward the attachment [Figure 79].

P-97158

P-91903B

1

P-71986A




Hydraulic X-Change (Later Models) (Cont’d)

Figure 80

Raise the boom until the X-Change pins (Item 1) engagethe attachment hooks (Item 2) [Figure 80] on the bucket.

Figure 81

Raise the boom and extend (curl in) the bucket cylinderuntil the X-Change contacts the back of the attachment[Figure 81].

With the arm vertical, lower the boom until the hooks(Item 1) of the bucket disengage the X-Change pins (Item2) and the plate (Item 3) [Figure 81] fully engages intothe bucket crossmember.


W-2119-0910

Figure 82

Press and hold the X-Change switch (Item 1) [Figure 82]to the left (OUT) and FULLY EXTEND the hydraulic pins.

Figure 83

Check that both hydraulic pins (Item 1) [Figure 83] arefully engaged to secure the attachment.


Both hydraulic pins must be fully extended throughthe attachment mounting holes. Failure to fullyengage the hydraulic pins can allow attachment tocome off.

W-2935-0512

P-71989A

1

2

P-71993A

1

23

P-91903B

1

P-69010

1





New attachments and new excavators are factoryequipped with flush face couplers. If installing anattachment equipped with poppet style couplers, theattachment couplers will have to be changed to matchthe excavator. See your Bobcat dealer for partsinformation.




I-2278-0608

With the excavator engine off and using the hose guides(if equipped), route the attachment hydraulic hoses to theexcavator. Connect the attachment hydraulic quickcouplers to the excavator couplers. (See Hydraulic QuickCouplers on Page 56.)

Check the attachment hydraulic hoses so the hoses arenot twisted or contacting any moving parts of theexcavator or attachment.




W-2019-0907

Loosen the quick coupler connections on the attachmenthydraulic hoses while connected to the machine. Do notremove the quick couplers.

Rotate the attachment hydraulic hoses as needed so thehoses are not twisted or contacting any moving parts ofthe excavator or attachment.

With the twist(s) removed from the hydraulic hoses,tighten the attachment quick coupler connections whilethe couplers are still connected to the excavator. This willhelp hold the hydraulic hoses in position while tightening.

Tighten the quick couplers connections to 63 N•m (47 ft-lb) torque before starting the excavator.



Engage auxiliary hydraulics. (See the excavator’sOperation & Maintenance Manual and Operator’sHandbook for correct procedure.)



W-2072-0807








I-2278-0608

NOTE: The following illustrations may not show yourhydraulic quick couplers exactly like theyappear but the procedure is correct.

New attachments and new excavators are factoryequipped with flush face couplers. If installing anattachment equipped with poppet style couplers, theattachment couplers will have to be changed to matchthe excavator. See your Bobcat dealer for partsinformation.

Figure 84


NOTE: The male flush face coupler is located on theright side of the arm and the female coupler islocated on the left side of the arm (E60excavators only).

WARNINGAVOID BURNS


W-2220-0396

To Connect:

Remove dirt or debris from the surface of both the maleand female couplers, and from the outside diameter ofthe male coupler. Visually check the couplers forcorroding, cracking, damage, or excessive wear. If any ofthese conditions exist, the coupler(s) must be replaced[Figure 84].

Install the male coupler into the female coupler. Fullconnection is made when the ball release sleeve slidesforward on the female coupler.

NOTE: Check that the attachment hydraulic hosesare not twisted or contacting any movingparts of the excavator or attachment. (See ForFirst Time Installation on Page 55.) for properadjustment.

To Disconnect:

Relieve hydraulic pressure. (See the excavator’sOperation & Maintenance Manual and Operator’sHandbook for correct procedure.)


P-49107



Control Functions


W-2119-0910

Engage the auxiliary hydraulics. (See the excavator’sOperation & Maintenance Manual and Operator’sHandbook for correct procedure.)

NOTE: Auxiliary hydraulic must be activated prior toattachment operation.

Figure 85

Raise the pedal lock / footrest (Item 1) to operate theauxiliary operation pedal (Item 2) [Figure 85].

Press the right side and hold down for continuoushydraulic flow to the couplers. The trencher will rotate assoon as the pedal is pressed.

To stop the trencher from rotating, remove foot frompedal. The pedal will then return to NEUTRAL position.

Figure 86

Move the switch (Item 1) [Figure 86] on the right controllever to the right to start the trencher.

Continuous Flow

Press the front switch (Item 2) [Figure 86] on the front ofthe right control lever for constant flow of fluid to thecouplers. The trencher will start to rotate.

Press the front switch (Item 2) [Figure 86] a second timeto stop the trencher.

P-08290

1

2

EARLIER MODELS

1

P-49130

2

LATER MODELS



Control Functions (Cont’d)

Figure 87

Move the switch (Item 1) [Figure 87] on the right controllever to the right to start the trencher.

Continuous Flow

Press the front switch (Item 2) [Figure 87] on the front ofthe right control lever for constant flow of fluid to thecouplers. The trencher will start to rotate.

Press the front switch (Item 2) [Figure 87] a second timeto stop the trencher.

Figure 88

Release the pedal lock (Item 1) and pivot the heel of thepedal to the rear (Item 2) [Figure 88].

Push the toe of the pedal (Item 3) [Figure 88] to starttrencher rotation.

NOTE: The secondary auxiliary hydraulics (footpedal) are required to operate the trencher onE60 excavators.

1

P-91921

22

E32, E35, E42, E45, E50 & E55 Machines

P-86221A

1

2 3

E60 Machine



Operation With The Excavator

Excavator Trenching Procedure


When operating the machine:• Keep the seat belt fastened snugly.• The control console(s) must be lowered.• Keep your feet and arms inside the cab.

W-2777-1208



D-1019-0910



Move to the operator’s seat, fasten seat belt and start theexcavator.

Figure 89

Raise the boom and arm and tilt the trencher forward untilthe trencher is at a 20 - 25° angle to the ground[Figure 89].

Engage the auxiliary hydraulics. (See the excavator’sOperation & Maintenance Manual and Operator’sHandbook for correct procedure.)


Lower the boom until the end of the attachment contactsthe ground and starts digging the trench. Continue tolower the boom while the trencher is digging until thetrencher is fully lowered.

Slowly tilt the trencher into the ground until the trencher isapproximately at a 60° angle to the ground.

When the attachment reaches this angle, it is at the bestdigging position.


Figure 90

To dig closer to a building or other structure, extend theboom swing cylinder and swing the upper structure untilthe trencher is in the position shown [Figure 90].

P-41752

P-23107



Removal

Bolt-On X-Change

Park the excavator on a flat, level surface. Put theattachment on the ground.



Figure 91

Disconnect the auxiliary couplers (Item 1) [Figure 91].(See Hydraulic Quick Couplers on Page 56.)

Remove the hoses from the hose retainer (Item 2)[Figure 91].

Figure 92

Remove the two bolts (Item 1) [Figure 92].

Figure 93

Remove the plate (Item 1) [Figure 93].

Enter the excavator and start the engine.

Figure 94

Lift the boom approximately 304,8 mm (1 ft) and extendthe bucket cylinder until the X-Change pins (Item 1)engage the hooks (Item 2) on the trencher frame[Figure 94].

P-27897

2

1

P-27903

1

P-27902

1

P-41749

1

2



Removal (Cont’d)


Figure 95

Retract the bucket cylinder and lower the boom until thetrencher is on the ground [Figure 95].

Figure 96

Lower the boom until the pins (Item 1) disengage thehooks (Item 2) [Figure 96].

Move the arm toward the excavator and raise the boomuntil it is clear of the trencher.

P-27893

P-27892

1

2



Removal (Cont’d)

X-Change System

Park the excavator on a flat, level surface. Put theattachment on the ground.



Figure 97

Disconnect the auxiliary couplers (Item 1) [Figure 97].(See Hydraulic Quick Couplers on Page 56.)

Remove the hoses from the hose retainer (Item 2)[Figure 97].

Figure 98

Install the X-Change tool (Item 1) [Figure 98] into thelatch.

Figure 99

Push down on the X-Change tool (Item 1) [Figure 99] tounlock the latch. Remove the tool.

Enter the excavator and start the engine.

Figure 100

Lift the boom approximately 304,8 mm (1 ft) and extendthe bucket cylinder until the X-Change pins (Item 1)engage the hooks (Item 2) [Figure 100] on the trencherframe.

P-27897

2

1

P-27899

1

P-279001

P-41749

1

2



Removal (Cont’d)


Figure 101

Retract the bucket cylinder and lower the boom until thetrencher is on the ground [Figure 101].

Figure 102

Lower the boom until the pins (Item 1) disengage thehooks (Item 2) [Figure 102].

Move the arm toward the excavator and raise the boomuntil it is clear of the trencher.

Fully retract the bucket cylinder to reset the X-Changelatch.

Pin-On X-Change

NOTE: Removal of the bucket is shown. Theprocedure is the same for other attachments.Disconnect any hydraulic lines that areoperated by hydraulic power before removingany attachments (breaker, direct drive auger,etc.).


W-2662-0108

Figure 103

Park the excavator on a flat level surface. Put theattachment on the ground [Figure 103].

With the engine off, turn the start key to the ON positionand move both hydraulic control levers to relievehydraulic pressure.


P-27893

P-27892

1

2

P-49838



Removal (Cont’d)


Figure 104

Remove the retainer pin (Item 1) [Figure 104].

Figure 105

Drive the pin (Item 1) [Figure 105] out of the attachmentand X-Change mount.



W-2019-0907

Figure 106

Start the engine, raise the boom approximately 305 mm(12 in) and retract the bucket cylinder until the X-Changepins (Item 1) engage the hooks (Item 2) [Figure 106] onthe attachment.

P-49710

1

P-49711

1

P-49835

1

2



Removal (Cont’d)


Figure 107

Fully retract the bucket cylinder and lower the boom andarm until the attachment is on the ground, and the X-Change pins (Item 1) are disengaged from the hooks(Item 2) [Figure 107].

Move the arm toward the excavator until the X-Changepins are clear of the attachment.

Hydraulic X-Change

NOTE: Removal and installation of the bucket isshown. The procedure is the same for otherattachments. Disconnect any hydraulic linesthat are operated by hydraulic power beforeremoving any attachments (breaker, directdrive auger, etc.).


Before leaving the machine:• Lower the work equipment to the ground.• Lower the blade to the ground.• Stop the engine and remove the key.

W-2196-0595

Figure 108

Park the excavator on a flat level surface. Put theattachment on the ground.

Stop the engine.


Remove retainer pin (Item 1) and retainer clips (Item 2)[Figure 108] from the hydraulic pin (both sides).

P-49836

1

2

P-71999B

12

21

2

2



Removal (Cont’d)

Hydraulic X-Change (Earlier Models)

NOTE: Removal and installation of the bucket isshown. The procedure is the same for otherattachments. Disconnect any hydraulic linesthat are operated by hydraulic power beforeremoving any attachments (breaker, directdrive auger, etc.).

Park the excavator on a flat level surface. Lower the workequipment to the ground.

Lower the blade to the ground.

Stop the engine and remove the key.

Relieve the auxiliary hydraulic pressure. (See theexcavator’s Operation & Maintenance Manual andOperator’s Handbook for the correct procedure.)


Disconnect the auxiliary hoses. (See Hydraulic QuickCouplers on Page 56.)


W-2119-0910

Figure 109

Remove retainer pin (Item 1) and retainer clips (Item 2)[Figure 109] from the hydraulic pin (both sides).

Figure 110

Install both retainer pins (Item 1) and clips (Item 2)[Figure 110] in the storage location.

P-71999B

12

21

2

2

P-71999C

1

22 22

1

22

1



Removal (Cont’d)


Figure 111


Start the engine.

Press and hold the X-Change switch (Item 1)[Figure 111] on the left console to the right to FULLYRETRACT the hydraulic pins.

Figure 112

Raise the boom and retract the bucket cylinder until theX-Change pins (Item 1) engage the attachment hooks(Item 2) [Figure 112] on the attachment.

Figure 113

Fully retract the bucket cylinder (bucket dump).

Lower the boom and arm until the attachment is on theground and the X-Change pins are disengaged from theattachment hooks.

Move the arm toward the excavator until the X-Changepins are clear of the attachment [Figure 113].

NOTE: In muddy conditions or to prevent thetrencher from freezing to the ground, placethe trencher on planks or blocks beforeremoving from the excavator.

P-64256A

1

P-69008A

2

1

1

2

P-69006B



Removal (Cont’d)

Hydraulic X-Change (Later Models)

NOTE: Removal and installation of the bucket isshown. The procedure is the same for otherattachments. Disconnect any hydraulic linesthat are operated by hydraulic power beforeremoving any attachments (breaker, auger,etc.).


W-2119-0910

Figure 114

Park the excavator on a flat level surface. Put theattachment on the ground [Figure 114].

Figure 115

Press and hold the X-Change switch (Item 1)[Figure 115] on the left console to the right (IN) toFULLY RETRACT the hydraulic pins.

Figure 116

Raise the boom and retract the bucket cylinder until theX-Change pins (Item 1) engage the attachment hooks(Item 2) [Figure 116] on the bucket.

Figure 117

Fully retract the bucket cylinder (bucket dump).

Lower the boom and arm until the attachment is on theground and the X-Change pins are disengaged from theattachment hooks.

Move the arm toward the excavator until the X-Changepins are clear of the attachment [Figure 117].

P-69004C

P-91903B

1

P-69008B

2

1

1

2

P-69006B


OPERATING PROCEDURE WITH MINI TRACK LOADERS

Approved Mini Track Loader Models And Requirements

Figure 118

X = Approved

The chart [Figure 118] shows the approved trenchermodels for each mini track loader model.



W-2662-0108

Figure 119

The loader must be equipped with front auxiliaryhydraulics [Figure 119] for proper operation of thetrencher. See your Bobcat dealer for available kits.

MINI TRACK LOADER MODEL

LT112 LT113

MT50 X XMT52 X XMT55 X XMT85 X X

P-83048


OPERATING PROCEDURE WITH MINI TRACK LOADERS (CONT’D)

Entering And Leaving The Operator’s Position


When operating the machine:• Operate only from the operator’s position at the

rear of the loader.• Always keep your hands on the controls.• Stay away from the tracks.

W-2407-0801


• Movement of the attachment will occur if the tiltcontrol is NOT in neutral when the engine isstarted.

• Always check that all levers are in neutral beforestarting the engine.

W-2482-1003


When using the ride-on platform:• Operate only with feet on platform and hands on

controls or grab handles.• Always look in the direction of travel.• Make sure swing area is clear of bystanders and

objects.• Avoid drop-offs and obstacles.

W-2480-1003

Entering

Enter the operator’s position at the rear of the mini trackloader.

Check the parking brake is engaged and all controls arein NEUTRAL.

See the mini track loader Operation & MaintenanceManual for detailed information on operating the minitrack loader.

Leaving

Figure 120

Stop the mini track loader on level ground [Figure 120].

Lower the lift arms and put the attachment flat on theground.

Disengage the auxiliary hydraulics.

Engage the parking brake.

Stop the engine.

Remove the key to prevent operation of the mini trackloader by unauthorized personnel.

Leave the operator’s position.






W-2722-0208

P124013



Installation

Hand Lever Bob-Tach

NOTE: The illustrations and instructions providedexplain how to install a bucket attachment onto a mini track loader. Follow these sameinstructions if you are installing differentattachments such as a grapple, tiller, combobucket, etc.

The attachment mounting frame for theattachment has a top flange that is designedto receive the top edge of the Bob-Tach andthe lower part of the frame is designed toreceive the Bob-Tach wedges.


W-2744-0608

Always inspect the mini track loader’s Bob-Tach and theattachment mounting frame before installation. See themini track loader’s Operation & Maintenance Manual.(See DAILY INSPECTION on Page 23.)

Figure 121


Move to the operator’s position.


Figure 122

Lower the lift arms and tilt the Bob-Tach forward.

Drive the mini track loader slowly forward until the topedge of the Bob-Tach is completely under the top flangeof the attachment [Figure 122].

NOTE: Be sure the Bob-Tach levers do not hit theattachment.

Figure 123

Tilt the Bob-Tach backward until the attachment is slightlyoff the ground [Figure 123]. This will cause theattachment mounting frame to fit up against the front ofthe Bob-Tach.

NOTE: When leaving the operator's position to installan attachment, tilt the attachment until it isslightly off the ground.

Stop the engine and leave the operator’s position. (SeeEntering And Leaving The Operator’s Position on Page70.)

P-41502

P-41504

P-41505




Hand Lever Bob-Tach (Cont’d)






W-2722-0208

Figure 124

Push down on the Bob-Tach levers until they are fullyengaged in the locked position [Figure 124] (wedgesfully extended through the attachment mounting frameholes).

Figure 125

Both levers must contact the frame as shown whenlocked [Figure 125].

If both levers do not engage in the locked position, seeyour Bobcat dealer for maintenance.



W-2715-0208

Figure 126


Connect auxiliary hydraulic hoses (if applicable). (SeeHydraulic Quick Couplers on Page 76.)

P-41502A

P-79781

FRAME CONTACT POINTS

Bob-Tach wedge mustcontact the lower edge of theattachment mounting framehole.

P-79780



Installation

Common Industry Interface (CII)

NOTE: The illustrations and instructions providedexplain how to install a bucket attachment onto a loader. Follow these same instructions ifyou are installing different attachments suchas a grapple, tiller, combo bucket, etc.

The attachment mounting frame for theattachment has a top flange that is designedto receive the top edge of the CommonIndustry Interface and the lower part of theframe is designed to receive the locking pins.


W-2744-0608

Always inspect the loader’s Common Industry Interfaceand the attachment mounting frame before installation.See the loader’s Operation & Maintenance Manual. (SeeDAILY INSPECTION on Page 23.)

Figure 127

Pull the CII locking pin levers up until they are fully raised[Figure 127].


Start the engine, and release the parking brake.

Figure 128

Lower the lift arms and tilt the CII forward.

Drive the loader slowly forward until the top edge of theCII is completely under the top flange of the attachmentmounting frame (Item 1) [Figure 128].

Tilt the CII backward until the attachment is slightly off theground [Figure 128]. This will cause the attachmentmounting frame to fit up against the front of the CII.

NOTE: Before leaving the operator position to installan attachment, tilt the attachment until it isslightly off the ground.

Stop the engine and exit the operator position.

WARNINGThe Neutral Start Interlock, Auxiliary HydraulicInterlock, and Lift / Tilt Lockouts must functionproperly.• The Neutral Start Interlock must prohibit the

engine from cranking when the Drive / SteeringJoystick is not in the NEUTRAL position.

• The Auxiliary Hydraulic Interlock must prohibitthe engine from cranking when the AuxiliaryHydraulic Control Lever is not in the centerposition.

• The Lift / Tilt Lockouts must deactivate the liftand tilt functions when engine is off.

If any of these do not function properly, contact yourdealer for service. DO NOT modify system.

W-2998-1015

P124033

P124034

1




Common Industry Interface (Cont’d)

Figure 129

Push down on the CII locking pin levers until they are fullyengaged in the locked position [Figure 129] (pins fullyextended through the attachment mounting frame holes).

WARNINGThe Common Industry Interface locking pins mustextend through the holes in attachment frame.Levers must be fully down and locked. Failure tosecure the locking pins can allow attachment tocome off and cause serious injury or death.

W-2996-1015

Figure 130

The pins (Item 1) must extend through the holes in theattachment mounting frame (Item 2) [Figure 130],securely fastening the attachment to the interface.

Connect auxiliary hydraulic hoses (if applicable). (SeeHydraulic Quick Couplers on Page 33.)

P124035

1

P124037P124036

11

2





New attachments and new mini track loaders are factoryequipped with flush face couplers. If installing anattachment equipped with poppet style couplers, theattachment couplers will have to be changed to matchthe mini track loader. See your Bobcat dealer for partsinformation.




I-2278-0608

With the mini track loader engine off and using the hoseguides (if equipped), route the attachment hydraulichoses to the mini track loader. Connect the attachmenthydraulic quick couplers to the mini track loader couplers.(See Hydraulic Quick Couplers on Page 76.)

Check the attachment hydraulic hoses so they are nottwisted or contacting any moving parts of the mini trackloader or attachment.




W-2019-0907

Loosen the quick coupler connections on the attachmenthydraulic hoses while connected to the mini track loader.Do not remove the quick couplers.

Rotate the attachment hydraulic hoses as needed sothey are not twisted or contacting any moving parts of themini track loader or attachment.

With the twist(s) removed from the hydraulic hoses,tighten the attachment quick coupler connections whilethey are still connected to the mini track loader. This willhelp hold the hydraulic hoses in position while tightening.

Tighten the quick couplers connections to 63 N•m (46 ft-lb) torque before starting the mini track loader.

Enter the operator’s position. (See Entering And LeavingThe Operator’s Position on Page 70.)


Engage auxiliary hydraulics. (See the mini track loader’sOperation & Maintenance Manual for correct procedure.)



W-2072-0807








I-2278-0608

New attachments and new mini track loaders are factoryequipped with flush face couplers. If installing anattachment equipped with poppet style couplers, theattachment couplers will have to be changed to matchthe mini track loader. See your Bobcat dealer for partsinformation.


Figure 131

WARNINGAVOID BURNS


W-2220-0396

To Connect

Remove any dirt or debris from the surface of both themale and female couplers, and from the outside diameterof the male coupler. Visually check the couplers forcorroding, cracking, damage, or excessive wear. If any ofthese conditions exist, the coupler(s) must be replaced[Figure 131].

Install the male coupler into the female coupler. Fullconnection is made when the ball release sleeve slidesforward on the female coupler [Figure 131].

NOTE: Check the attachment hydraulic hoses sothey are not twisted or contacting any movingparts of the mini track loader or attachment.(See For First Time Installation on Page 75.)for proper adjustment.

To Disconnect

Relieve hydraulic pressure. (See the mini track loader’sOperation & Maintenance Manual for correct procedure.)


P-81898



Control Functions

Figure 132

With the operator at the operator's position at the rear ofthe mini track loader, start the engine. Move the auxiliarycontrol lever (Item 1) [Figure 132] rearward to activatethe front auxiliary hydraulics. The trencher chain andauger will start to rotate.

Move the auxiliary control lever to the NEUTRAL positionto disengage the auxiliary hydraulics. The trencher willstop. (See the mini track loader’s Operation &Maintenance Manual for a complete description on minitrack loader controls.)


When operating the machine:• Operate only from the operator’s position at the

rear of the loader.• Always keep your hands on the controls.• Stay away from the tracks.

W-2407-0801


W-2119-0910

Variable Flow:

With the operator at the operator's position at the rear ofthe mini track loader, start the engine. Pull the auxiliaryhydraulic control lever (Item 1) [Figure 132] back forauxiliary hydraulic oil flow to the front female coupler. Thetrencher chain and auger will start to rotate. (See the minitrack loader’s Operation & Maintenance Manual for acomplete description on mini track loader controls.)

NOTE: Hydraulic oil flow increases to the coupler asthe lever (Item 1) [Figure 132] is moved furtherfrom the NEUTRAL position.

P-48418A

1

EARLIER MODEL MT52 & MT55

P116999

MT85

1

P-81916B

LATER MODEL MT52 & MT55

2

1

P-21480

1

MODEL MT50



Control Functions (Cont’d)

Continuous Flow

Figure 133

For Later Model MT52 And MT55:

• While holding the Continuous Flow Shutoff Lever(Item 1) [Figure 133] down, pull the auxiliaryhydraulic control lever (Item 1) [Figure 132] all theway back until it locks (DETENT position) forcontinuous hydraulic oil flow to the front femalecoupler. The trencher chain and auger will start andcontinue to rotate. (See the mini track loader’sOperation & Maintenance Manual for a completedescription on mini track loader controls.)

• To stop the trencher operation, release theContinuous Flow Shutoff Lever (Item 1) [Figure 133].The auxiliary hydraulic control lever (Item 1)[Figure 132] will return to NEUTRAL in one to threeseconds.

Figure 134

For MT85:

• While standing on the operator platform anddepressing the Continuous Flow Shutoff Pedal (Item1) [Figure 134], pull the auxiliary hydraulic controllever (Item 1) [Figure 132] all the way back until itlocks (DETENT position) for continuous hydraulic oilflow to the front female coupler. The trencher chainand auger will start and continue to rotate. (See themini track loader’s Operation & Maintenance Manualfor a complete description on mini track loadercontrols.)

• To stop the trencher operation, release theContinuous Flow Shutoff Pedal (Item 1) [Figure 134].The auxiliary hydraulic control lever (Item 1)[Figure 132] will return to NEUTRAL in one to threeseconds.

P-81916B


11

P124071

MT85

2



Operation With The Mini Track Loader

Manual Side Shift

Always park on flat level ground.

Lower the trencher keeping slightly off the ground.

Stop the engine and exit the operator’s position. (SeeEntering And Leaving The Operator’s Position on Page70.)

WARNINGBefore you leave the operator’s position at the rear ofthe loader:• Lower lift arms and put attachment flat on

ground.• Disengage auxiliary hydraulic system.• Engage parking brake.• Stop engine. Remove key.

W-2416-1015

Figure 135

Loosen the two bolts (Item 1) from both the left and rightblocks (Item 2) [Figure 135] holding the trencher in thedesired position.

Figure 136

Move the trencher to the desired position [Figure 136].

Slide the blocks (Item 2) [Figure 136] against thetrencher frame, then tighten the bolts to 34 - 38 N•m (25 -28 ft-lb) torque.

P-41722

2

P-41525

21

1

1

1

P-41723



Operation With The Mini Track Loader (Cont’d)



D-1019-0910



Mini Track Loader (MT50) Trenching Procedure

Move to the operator’s position at the rear of the minitrack loader, start the engine.

Move the mini track loader / attachment to the startingpoint.

Move the travel levers to the NEUTRAL position.

Figure 137

Move the engine speed control lever to the low idleposition. Pull the operation mode selector (Item 1)[Figure 137] back to the speed control position.

Turn the speed control knob (Item 2) fully clockwise (notravel speed), engage the travel levers (Item 3)[Figure 137] in the reverse travel direction.

Turn the speed control knob (Item 2) [Figure 137]clockwise until the desired loader speed is obtained.Return the travel levers to the NEUTRAL position.

NOTE: The operator can vary the amount of turns onthe speed control knob to fit the attachmentspeed and is variable from 1/2 maximum highrange to no travel speed. It may be adjustedwhile the attachment is operating.

Figure 138



Move the engine speed control lever to the high idleposition.


Slowly tilt the Bob-Tach into the ground until the trencherboom is approximately at a 60° angle to the ground.When the attachment reaches this angle, it is at the bestdigging position.


P-21480

1

23

MODEL MT50

P-41728




Earlier Mini Track Loader (MT52 And MT55) Trenching Procedure



Move the travel levers to the NEUTRAL position.

Figure 139

Move the lever (Item 1) [Figure 139] up to increaseengine speed. Move the lever down to decrease enginespeed.

NOTE: For maximum performance, run the engine atfull speed.

The Reverse Travel Speed Control allows the operator tomove the mini track loader backward at slower speeds tooptimize efficiency with certain attachments.

Figure 140

The Reverse Travel Speed Control (Item 1) [Figure 140]can be used when a constant slower speed is desired.

Figure 141

• Put the Drive / Steering Control (Item 2) [Figure 140]in the NEUTRAL position.

• Loosen the knob (Item 1) [Figure 141].

• Slide the knob to the left to reduce travel speed. Theinitial move of the control will reduce the travel speedto 1/2; any addition movement of the control willcontinue to reduce the travel speed until itapproaches very slow travel speed.

• Tighten the knob.

NOTE: You can vary the amount that you move theSpeed Control Knob to fit your needs. Thetravel speed is variable from 1/2 of the normalreverse speed to very slow.

P-48418

1


P-48418

2

1


P-57599

P-48892

1


FULLSPEED

HALFSPEED

SLOWSPEED

ContinuouslyVariable




Later Mini Track Loader (MT52 And MT55) Trenching Procedure



Place the Drive / Steering Control in the NEUTRALposition.

Figure 142

Move the engine speed control lever (Item 1)[Figure 142] up to increase engine speed. Move thelever down to decrease engine speed.


Use the Drive / Steering Control (Item 2) [Figure 142] fordirectional travel. (See the mini track loader’s Operation &Maintenance Manual for correct procedure.)

The Reverse Travel Speed Control Lever is used with theDrive / Steering Control to limit the mini track loaderreverse travel speeds to optimize efficiency with certainattachments.

Figure 143

The Reverse Travel Speed Control (Item 1) [Figure 143]can be used when a constant slower speed is desired.

Figure 144

• Put the Drive / Steering Control (Item 2) [Figure 143]in the NEUTRAL position.

• Slide the lever (Item 1) [Figure 144] to the left toreduce the reverse travel speed. Move the Drive /Steering Control fully backward and the mini trackloader will travel in reverse at the set speed. To adjustthe reverse travel speed again, return the Drive /Steering Control to the NEUTRAL position and slidethe lever to the desired position.

NOTE: You can vary the amount that you move theReverse Speed Control Lever to fit yourneeds. The travel speed is variable from fullspeed reverse to slow speed.

P-81916B


1

2

P-81916B

2

1


P-81901


Continuously VariableSlow

SpeedFull

Speed

1




Mini Track Loader (MT52 And MT55) Trenching Procedure (Cont’d)

Figure 145





Slowly tilt the Bob-Tach into the ground until the trencherboom is approximately at a 60° angle to the ground.When the attachment reaches this angle, it is at the bestdigging position.


P-41728




MT85 Trenching Procedure



Figure 146

Place the Drive / Steering Control (Item 1) [Figure 146]in the NEUTRAL position.

Move the engine speed control lever (Item 2)[Figure 146] up to increase engine speed. Move thelever down to decrease engine speed.


Use the Drive / Steering Control (Item 1) [Figure 146] fordirectional travel. (See the mini track loader’s Operation &Maintenance Manual for correct procedure.)

Figure 147





Slowly tilt the attachment into the ground until thetrencher boom is approximately at a 60° angle to theground. When the attachment reaches this angle, it is atthe best digging position.


P116997

MT85

2

1

P-41728



Removal

Hand Lever Bob-Tach


NOTE: In muddy conditions or to prevent theattachment from freezing to the ground, putthe attachment on planks or blocks beforeremoving the attachment from the mini trackloader.

Stop the engine and release auxiliary hydraulic pressure(if applicable). (See the mini track loader’s Operation &Maintenance Manual for correct procedure.)

Leave the operator’s position. (See Entering And LeavingThe Operator’s Position on Page 70.)






W-2722-0208


Figure 148


WARNINGBob-Tach levers have spring tension. Hold levertightly and release slowly. Failure to obey warningcan cause injury.

W-2054-1285



Figure 149

Tilt the Bob-Tach forward and drive the mini track loaderbackward, away from the attachment [Figure 149].

P-41502B

P-41504A



Removal

Common Industry Interface (CII)


NOTE: In muddy conditions or to prevent theattachment from freezing to the ground, putthe attachment on planks or blocks beforeremoving the attachment from the mini trackloader.

Stop the engine and release auxiliary hydraulic pressure(if applicable). (See the mini track loader’s Operation &Maintenance Manual for correct procedure.)

Leave the operator’s position. (See Entering And LeavingThe Operator’s Position on Page 70.)

WARNINGThe Neutral Start Interlock, Auxiliary HydraulicInterlock, and Lift / Tilt Lockouts must functionproperly.• The Neutral Start Interlock must prohibit the

engine from cranking when the Drive / SteeringJoystick is not in the NEUTRAL position.

• The Auxiliary Hydraulic Interlock must prohibitthe engine from cranking when the AuxiliaryHydraulic Control Lever is not in the centerposition.

• The Lift / Tilt Lockouts must deactivate the liftand tilt functions when engine is off.

If any of these do not function properly, contact yourdealer for service. DO NOT modify system.

W-2998-1015


Figure 150

Pull the CII locking pin levers up until they are fully raised(pins fully raised) [Figure 150].

WARNINGLocking pin levers have spring tension. Hold levertightly and release slowly. Failure to obey warningcan cause injury.

W-2997-1015



Figure 151

Tilt the CII forward and drive the mini track loaderbackward, away from the attachment [Figure 151].

P124033

P124034


LIFTING THE ATTACHMENT

Procedure

Lifting The LT112 / LT113 Trencher

Figure 152

Install a chain (Item 1) [Figure 152] around the boom.

Install a chain in the two holes (Item 2) [Figure 152] (oneach side of the loader mount frame).


Lifting The MX112 Trencher

Figure 153

Install a chain (Item 1) [Figure 153] around the boom.

Install a chain around the top tube (Item 2) [Figure 153]of the X-change mount frame (on each side of thetrencher).


P-41740

12

P-41742

1

2

2


TRANSPORTING THE ATTACHMENT ON A TRAILER

Fastening

When the LT112, MX112 and LT113 is placed on atransport vehicle by lifting (See LIFTING THEATTACHMENT on Page 87.) use the fastening procedureoutlined below.

Figure 154

Figure 155

Figure 156

Wrap a chain (Item 1) [Figure 154], [Figure 155] and[Figure 156] around the chain boom. Connect a chain(Item 2) [Figure 154] and [Figure 155] to each side ofthe mount frame.

Use chain binders to prevent the attachment from movingduring transport.

Secure the hydraulic hoses to the trencher.

P-27796A

21

P-27914

2

1

P-27916

1


TRANSPORTING THE ATTACHMENT ON A TRAILER(CONT’D)

Fastening (Cont’d)

When the MX112 is placed on a transport vehicle directlyfrom the excavator, use the fastening procedure outlinedbelow.

Figure 157

Figure 158

Figure 159

Wrap a chain (Item 1) [Figure 157], [Figure 158] and[Figure 159] around the chain boom. Connect a chain(Item 2) [Figure 157] and [Figure 158] to each side ofthe mount frame.

Use chain binders to prevent the attachment from movingduring transport.

Secure the hydraulic hoses to the trencher.

P-27911

2

1

P-27912

21

P-27913

1


TRANSPORTING THE ATTACHMENT AND MACHINEON A TRAILER

Loading And Fastening

WARNINGAVOID SERIOUS INJURY OR DEATH

Adequately designed ramps of sufficient strength areneeded to support the weight of the machine whenloading onto a transport vehicle. Wood ramps canbreak and cause personal injury.

W-2058-0807

Be sure the transport and towing vehicles are ofadequate size and capacity for weight of machine andattachment combination. (See machine and attachmentOperation & Maintenance Manuals for specifications.)

Loading

The rear of the trailer must be blocked or supported whenloading and unloading to prevent the front of the trailerfrom raising.

Figure 160

Figure 161

Figure 162

• Load the heaviest end of the machine and attachmentcombination first [Figure 160], [Figure 161] and[Figure 162].

• Lower the attachment to the floor.

• Stop the engine.

• Engage the parking brake (if equipped).

• Exit the machine. (See the machine’s Operation &Maintenance Manual for the correct procedure.)

Fastening

• Install chains at the front and rear tie down positionson the machine. (See the machine’s Operation &Maintenance Manual to properly chain the machine tothe transport vehicle.)

• Install chains on the attachment (if needed).

• Fasten each end of the chain to the transport vehicle.

NOTE: Use chain binders to prevent the attachmentand machine from moving during transport.

P-41738

P-41739

P-41754


PREVENTIVE MAINTENANCE

MAINTENANCE SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95

LUBRICATING THE ATTACHMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96Lubrication Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96

REMOVAL AND INSTALLATION OF AUGER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97Procedure(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97

REMOVAL AND INSTALLATION OF DIGGING CHAIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98Procedure(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99

REMOVAL AND INSTALLATION OF DIGGING CHAIN TEETH . . . . . . . . . . . . . . . . . . . . . .100Procedure(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100

LT112 AND MX112 SINGLE STANDARD PATTERNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1010,61 m x 102 mm (2 ft x 4 in) Cup Tooth Pattern Installation . . . . . . . . . . . . . . . . . . . . . .1020,61 m x 152 mm (2 ft x 6 in) Cup Tooth Pattern Installation . . . . . . . . . . . . . . . . . . . . . .1030,61 m x 203 mm (2 ft x 8 in) Cup Tooth Pattern Installation . . . . . . . . . . . . . . . . . . . . . .104

LT113 SINGLE STANDARD PATTERNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1050,61 m x 102 mm (2 ft x 4 in) Cup Tooth Pattern Installation . . . . . . . . . . . . . . . . . . . . . .1060,61 m x 152 mm (2 ft x 6 in) Cup Tooth Pattern Installation . . . . . . . . . . . . . . . . . . . . . .1070,61 m x 203 mm (2 ft x 8 in) Cup Tooth Pattern Installation . . . . . . . . . . . . . . . . . . . . . .1080,91 m x 102 mm (3 ft x 4 in) Cup Tooth Pattern Installation . . . . . . . . . . . . . . . . . . . . . .1090,91 m x 152 mm (3 ft x 6 in) Cup Tooth Pattern Installation . . . . . . . . . . . . . . . . . . . . . .1100,91 m x 203 mm (3 ft x 8 in) Cup Tooth Pattern Installation . . . . . . . . . . . . . . . . . . . . . .111

LT112 AND MX112 DOUBLE STANDARD PATTERNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1120,61 m x 102 mm (2 ft x 4 in) Cup Tooth Pattern Installation . . . . . . . . . . . . . . . . . . . . . .1130,61 m x 102 mm (2 ft x 4 in) Carbide Tooth Pattern Installation . . . . . . . . . . . . . . . . . . .1140,61 m x 102 mm (2 ft x 4 in) Cup Tooth / Carbide Tooth Pattern Installation . . . . . . . . . .1150,61 m x 152 mm (2 ft x 6 in) Cup Tooth Pattern Installation . . . . . . . . . . . . . . . . . . . . . .1160,61 m x 203 mm (2 ft x 8 in) Cup Tooth Pattern Installation . . . . . . . . . . . . . . . . . . . . . .117


LT113 DOUBLE STANDARD PATTERNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1180,61 m x 102 mm (2 ft x 4 in) Cup Tooth Pattern Installation . . . . . . . . . . . . . . . . . . . . . .1190,61 m x 102 mm (2 ft x 4 in) Carbide Tooth Pattern Installation . . . . . . . . . . . . . . . . . . .1200,61 m x 102 mm (2 ft x 4 in) Cup Tooth / Carbide Tooth Pattern Installation . . . . . . . . . .1210,61 m x 152 mm (2 ft x 6 in) Cup Tooth Pattern Installation . . . . . . . . . . . . . . . . . . . . . .1220,61 m x 203 mm (2 ft x 8 in) Cup Tooth Pattern Installation . . . . . . . . . . . . . . . . . . . . . .1230,91 m x 102 mm (3 ft x 4 in) Cup Tooth Pattern Installation . . . . . . . . . . . . . . . . . . . . . .1240,91 m x 102 mm (3 ft x 4 in) Carbide Tooth Pattern Installation . . . . . . . . . . . . . . . . . . .1250,91 m x 102 mm (3 ft x 4 in) Cup Tooth / Carbide Tooth Pattern Installation . . . . . . . . . .1260,91 m x 152 mm (3 ft x 6 in) Cup Tooth Pattern Installation . . . . . . . . . . . . . . . . . . . . . .1270,91 m x 203 mm (3 ft x 8 in) Cup Tooth Pattern Installation . . . . . . . . . . . . . . . . . . . . . .128

LT112 SHARK PATTERNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1290,61 m x 102 mm (2 ft x 4 in) Shark Tooth Pattern Installation . . . . . . . . . . . . . . . . . . . . .1300,61 m x 152 mm (2 ft x 6 in) Shark Tooth Pattern Installation . . . . . . . . . . . . . . . . . . . . .131

LT113 SHARK PATTERNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .132Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1320,91 m x 102 mm (3 ft x 4 in) Shark Tooth Pattern Installation . . . . . . . . . . . . . . . . . . . . .1330,91 m x 152 mm (3 ft x 6 in) Shark Tooth Pattern Installation . . . . . . . . . . . . . . . . . . . . .134

ATTACHMENT STORAGE AND RETURN TO SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . .135Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135Return To Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135


MAINTENANCE SAFETY

WARNING

Never service attachments / implements withoutinstructions. See Operation & Maintenance Manual andAttachment / Implement Service Manual.

Cleaning and maintenance are required daily.

Never service or adjust attachment / implement with theengine running unless instructed to do so in manual.

Always lower the attachment / implement to the groundbefore lubricating or servicing.

Avoid contact with leaking hydraulic fluid or diesel fuelunder pressure. It can penetrate skin or eyes.

Stop, cool and clean engine of flammable materials beforechecking fluids.

Keep body, loose objects and clothing away from movingparts, electrical contacts, hot parts and exhaust.

Safety glasses are needed for eye protection from electricalarcs, battery acid, compressed springs, fluids underpressure and flying debris or when tools are used. Use eyeprotection approved for type of welding.

MSW30-0409

P-90216

CORRECT

WARNINGInstructions are necessary before operating or servicing machine. Read andunderstand the Operation & Maintenance Manual, Operator’s Handbook andsigns (decals) on machine. Follow warnings and instructions in the manualswhen making repairs, adjustments or servicing. Check for correct function afteradjustments, repairs or service. Untrained operators and failure to followinstructions can cause injury or death. W-2003-0807

Safety Alert Symbol: This symbol with a warning statement, means: “Warning, be alert! Your safety is involved!” Carefully read the message that follows.


TROUBLESHOOTING

Chart

If the attachment is not working correctly, check the hydraulic system of the machine thoroughly before making any repairson the attachment. Attachment problems can be affected by a hydraulic system that is not operating to specifications.Connect a flow meter to the machine to check the hydraulic pump output, relief valve setting and tube lines to check flowand pressure. (See the machine’s Service Manual for the correct procedure to connect the flow meter.)

Use the following troubleshooting chart to locate and correct problems which most often occur with the attachment.

PROBLEM CAUSE CORRECTION

Trencher does not mount properlyon the Bob-Tach.

Bob-Tach wedges are not fullyretracted before installing.

Retract Bob-Tach wedges before installing.

Mud, dirt or stones are lodgedbetween the Bob-Tach and theTrencher mount.

Remove debris between Bob-Tach andtrencher mount.

Trencher does not operate. No hydraulic flow. Activate machine front auxiliary hydraulics.

Check quick couplers connection. Check fordamaged hose ends and fittings.

Digging chain does not stayadjusted to the correct tension.

Damaged grease cylinder. Repair or replace grease cylinder.

WARNING

Instructions are necessary before operating or servicing machine. Read andunderstand the Operation & Maintenance Manual, Operator’s Handbook andsigns (decals) on machine. Follow warnings and instructions in the manualswhen making repairs, adjustments or servicing. Check for correct functionafter adjustments, repairs or service. Untrained operators and failure to followinstructions can cause injury or death. W-2003-0807


LUBRICATING THE ATTACHMENT

Lubrication Locations

Always use a good quality lithium base grease whenlubricating the trencher.

Figure 163

Add grease daily to the idler wheels (Item 1) [Figure163].

P-32318

1


REMOVAL AND INSTALLATION OF AUGER

Procedure(s)

Figure 164

Remove the mounting bolt (Item 1) [Figure 164] and nutfrom the auger mounting shaft.

Installation: Tighten auger mounting bolt and nut to 88 -95 N•m (65 - 70 ft-lb) torque.

Figure 165

Slide the auger (Item 1) [Figure 165] off the mountingshaft.

Always add anti-seize lubricant to the shaft to helpprevent the auger from seizing on the shaft.

Figure 166

NOTE: It may not be possible to loosen the auger byhand. If so, remove the bolt (Item 1) [Figure166] from the end of the auger and install apuller to loosen the auger.

Adjustment

Figure 167

NOTE: There are four holes in the auger mountingshaft [Figure 167].

Locate the auger in the hole (Item 1) [Figure 167] closestto the chain sprocket for the 101,6 mm (4 in) diggingwidth.

P-41755

1

P-278831

P-41725

1

P-27884

1


REMOVAL AND INSTALLATION OF DIGGING CHAIN

Procedure(s)

If the trencher is installed on the loader or excavator,disconnect the auxiliary hydraulic hoses.

Figure 168

Install a chain (Item 1) [Figure 168] on the end of theboom.

Remove the auger.

Figure 169

Remove the top bolt (Item 1) and loosen the bottom bolt(Item 2) [Figure 169].

Rotate the cover (Item 3) [Figure 169] down.

WARNINGAVOID INJURY

Grease and fitting can be under high pressure. Standon side of boom opposite lube fitting when applyingor removing tension from digging chain. Keepbystanders away. Use correct fitting to preventpressure from blowing it off.

W-2110-0695

Figure 170

Loosen the bleed screw (Item 1) [Figure 170] (located inthe lower hole).

Figure 171

Push the cylinder back to put slack in the chain (Item 1)[Figure 171].

P-41756

1

P-27886

1

2

3

P-27887

1

P-41756

1


REMOVAL AND INSTALLATION OF DIGGING CHAIN(CONT’D)

Procedure(s) (Cont’d)



W-2019-0907

Figure 172

Remove the pin (Item 1) [Figure 172].

The pin (Item 2) is a slight press fit. Back-up the chainusing a large hammer while driving the pin (Item 2)[Figure 172] out with a second hammer.

Remove the chain from the trencher.

When installing the chain, make sure the chain teeth arefacing the correct direction for cutting.

Adjustment

IMPORTANTBoom cylinder must be full of grease to workcorrectly, any air in cylinder can cause damage. Donot put excessive tension on the chain. This willcause faster chain wear and horsepower loss.

I-2046-0695

Figure 173

Figure 174

Add grease to the grease fitting (Item 1) [Figure 173]until there is 25,4 mm (1.0 in) clearance between thebottom of the chain guide and the top of the chain[Figure 174]. Measure the chain at the center of theboom.

P-27889

1

2P-27890

1

P-41757

25,4 mm(1.0 in)


REMOVAL AND INSTALLATION OF DIGGING CHAINTEETH

Procedure(s)



W-2019-0907

Figure 175

Remove the two bolts (Item 1) and tooth (Item 2) [Figure175].

Installation: Tighten the bolts to 125 - 135 N•m (90 - 100ft-lb) torque.

P-41758

2

1


LT112 AND MX112 SINGLE STANDARD PATTERNS

Component Description

WARNINGDo not strike the cutter bit with a hammer. The hardbit can shatter and cause serious injury. Use thecorrect bit installation tool.

W-2114-1191

Figure 176

Right hand digging tooth [Figure 176].

Figure 177

Left hand digging tooth [Figure 177].

Figure 178

Bushing [Figure 178].

Figure 179

Spacers [Figure 179].

P-60051P-60050

P-60052 P-60053

P-60061

P-60062


LT112 AND MX112 SINGLE STANDARD PATTERNS (CONT’D)

0,61 m x 102 mm (2 ft x 4 in) Cup Tooth Pattern Installation

Instructions: Install teeth 1 thru 25 as indicated below.

P-60046C

1

3

5

7

9

11

13

15

17

19

21

23

25

P-60046A

NOTE: The arrow indicates the directionof chain travel.





1

3

5

7

9

11

13

15

17

19

21

23

25

P-60030BP-60030A

NOTE: The arrowindicates thedirection ofchain travel.





P-60028BP-60028A

1

3

5

7

9

16

18

20

22

11

13

24

26

14

NOTE: The arrow indicates thedirection of chain travel.


LT113 SINGLE STANDARD PATTERNS



W-2114-1191

Figure 180


Figure 181


Figure 182


Figure 183


P-60051P-60050

P-60052 P-60053

P-60061

P-60062


LT113 SINGLE STANDARD PATTERNS (CONT’D)



P-60046C

1

3

5

7

9

11

13

15

17

19

21

23

25

P-60046A

NOTE: The arrow indicatesthe direction ofchain travel.





1

3

5

7

9

11

13

15

17

19

21

23

25

P-60030BP-60030A

NOTE: The arrowindicatesthedirectionof chaintravel.





P-60028BP-60028A

1

3

5

7

9

16

18

20

22

11

13

24

26

14






P-60046C

1

3

5

7

9

11

13

15

17

19

21

23

25

27

29

31

33

P-60046BP-60046A






P-60008BP-60008BP-60008A

1

3

5

7

9

11

13

15

17

19

21

23

25

27

29

31

33






P-60028CP-60028CP-60028D

1

3

5

7

9

15

17

19

21

23

31

11

13

25

27

29

33



LT112 AND MX112 DOUBLE STANDARD PATTERNS



W-2114-1191

Figure 184


Figure 185


Figure 186

In-line holder assembly [Figure 186].

Figure 187

Right hand bit holder assembly [Figure 187].

Figure 188

Left hand bit holder assembly [Figure 188].

Figure 189


Figure 190


P-60051P-60050

P-60052 P-60053

P-60055P-60054

P-60057P-60056

P-60059P-60058

P-60061

P-60062


LT112 AND MX112 DOUBLE STANDARD PATTERNS (CONT’D)



P-60004C

1

3

5

7

9

11

12

14

16

19

21

22

23

26

P-60004BP-60004A

2

4

6

8

10

13

15

17

18

20

24

25




0,61 m x 102 mm (2 ft x 4 in) Carbide Tooth Pattern Installation


P-60016CP-60016BP-60016A

1

3

5

7

9

13

15

19

20

22

24

26

25

2

4

6

8

10

11

12

14

16

17

18

21

23




0,61 m x 102 mm (2 ft x 4 in) Cup Tooth / Carbide Tooth Pattern Installation


P-60028BP-60028BP-60028A

1

3

5

7

9

13

15

17

19

21

11

12

25

26

10

8

6

4

2

14

16

18

20

22

23

24






P-60022BP-60022A

1

3

5

7

9

13

15

17

19

21

11

12

10

8

6

4

2

14

16

18

20

22

23

24

25

26






P-60024BP-60024A

1

3

5

7

9

13

17

19

21

11

12

2510

8

6

4

2

14

16

18

20

22

26

15

23

24



LT113 DOUBLE STANDARD PATTERNS



W-2114-1191

Figure 191


Figure 192


Figure 193

In-line holder assembly [Figure 193].

Figure 194

Right hand bit holder assembly [Figure 194].

Figure 195

Left hand bit holder assembly [Figure 195].

Figure 196


Figure 197


P-60051P-60050

P-60052 P-60053

P-60055P-60054

P-60057P-60056

P-60059P-60058

P-60061

P-60062


LT113 DOUBLE STANDARD PATTERNS (CONT’D)



P-60004C

1

3

5

7

9

11

12

14

16

19

21

22

23

26

P-60004BP-60004A

2

4

6

8

10

13

15

17

18

20

24

25






P-60016CP-60016BP-60016A

1

3

5

7

9

13

15

19

20

22

24

26

25

2

4

6

8

10

11

12

14

16

17

18

21

23






P-60028BP-60028BP-60028A

1

3

5

7

9

13

15

17

19

21

11

12

25

26

10

8

6

4

2

14

16

18

20

22

23

24






P-60022BP-60022A

1

3

5

7

9

13

15

17

19

21

11

12

10

8

6

4

2

14

16

18

20

22

23

24

25

26

NOTE: The arrowindicatesthedirection ofchaintravel.





P-60024BP-60024A

1

3

5

7

9

13

17

19

21

11

12

2510

8

6

4

2

14

16

18

20

22

26

15

23

24






P-60004D

1

3

5

7

9

11

12

14

16

19

21

22

23

26

29

31

33

P-60004BP-60004A

2

4

6

8

10

13

15

17

18

20

24

25

27

28

30

32

34






P-60016DP-60016BP-60016A

1

3

5

7

9

13

15

19

20

22

24

26

25

27

2

4

6

8

10

11

12

14

16

17

18

21

23

28

29

30

31

32

33

34






P-60006CP-60006BP-60006A

1

3

5

7

9

13

15

17

19

21

11

12

25

26

10

8

6

4

2

14

16

18

20

22

23

24

27

28

29

30

31

32

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P-60022EP-60022DP-60022C

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P-60020EP-60020DP-60020C

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LT112 SHARK PATTERNS


Figure 198


Figure 199


Figure 200

Tooth center shark [Figure 200].

Figure 201

Tooth left shark [Figure 201].

Figure 202

Tooth right shark [Figure 202].

Figure 203


Figure 204


P-60051P-60050

P-60052 P-60053

NA7067

NA7070

NA7071

P-60061

P-60062


LT112 SHARK PATTERNS (CONT’D)

0,61 m x 102 mm (2 ft x 4 in) Shark Tooth Pattern Installation


NA7058

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LT113 SHARK PATTERNS


Figure 205


Figure 206


Figure 207

Tooth center shark [Figure 207].

Figure 208

Tooth left shark [Figure 208].

Figure 209

Tooth right shark [Figure 209].

Figure 210


Figure 211


P-60051P-60050

P-60052 P-60053

NA7067

NA7070

NA7071

P-60061

P-60062





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ATTACHMENT STORAGE AND RETURN TO SERVICE

Storage

Sometimes it may be necessary to store your Bobcatattachment for an extended period of time. Below is a listof items to perform before storage:

• Thoroughly clean and wash the attachment.

• Lubricate the attachment.

• Inspect the mounting frame and all welds on theattachment for wear and damage.

• Check for loose hardware, missing guards, ordamaged parts.

• Replace worn or damaged parts.

• Check for damaged or missing decals. Replace ifnecessary.

• Place the attachment in a dry protected shelter.

• Place the attachment flat on the ground.

NOTE: In muddy conditions or to prevent theattachment from freezing to the ground, putthe attachment on planks or blocks beforeremoving the attachment from the machine.

Return To Service

After the Bobcat attachment has been in storage, it isnecessary to follow a list of items to return theattachment to service:

• Check for damaged or missing decals. Replace ifnecessary.

• Be sure all shields and guards are in place.

• Lubricate the attachment.

• Check for loose hardware, missing or damaged parts.

• Check for leaks. Repair as needed.

• Install and operate attachment, check for correctfunction.


MACHINE SIGN TRANSLATIONS

MACHINE SIGN TRANSLATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .139Warning (6575965) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .139Danger (6579914) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .140


MACHINE SIGN TRANSLATIONS

Warning (6575965)


MACHINE SIGN TRANSLATIONS (CONT’D)

Danger (6579914)


SPECIFICATIONS

(LT112 AND LT113) TRENCHER SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .143Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .143Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .143Hydraulic System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .144

(MX112) TRENCHER SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .145Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .145Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .145Hydraulic System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .146


(LT112 AND LT113) TRENCHER SPECIFICATIONS

Dimensions

• Where applicable, specifications conform to SAE and ISO standards and are subject to change without notice.

Performance

DESCRIPTION LT112 (2 FT) LT113 (3 FT)

Overall Length (A) 1542 mm (60.7 in) 1880 mm (74.0 in)

Standard Boom Length (B) 1000 mm (39.4 in) 1334 mm (52.5 in)

Digging Depth @ 60° (C) .6 m (2 ft) .9 m (3 ft)

Frame Width (D) 914 mm (36.0 in) 914 mm (36.0 in)

Side Shift Travel (E) 409 mm (16.1 in) 409 mm (16.1 in)

Auger Clearance (F) 351 - 401 mm (13.8 - 15.8 in) 351 - 401 mm (13.8 - 15.8 in)

P-94702

A

C

D

E

F

60°

B


Operating Weight (Without Teeth) 278 kg (613 lb) 289 kg (638 lb)

Chain Size 42 mm (1.654 in) 42 mm (1.654 in)

Chain Width 101 - 203 mm (4 - 8 in) 101 - 203 mm (4 - 8 in)

Chain Speed @ 15 gpm (57 L/min) 105.2 m/min (345 ft/min) 105.2 m/min (345 ft/min)

Chain Tightener Grease Cylinder Grease Cylinder

Auger Diameter 305 mm (12.0 in) 305 mm (12.0 in)


(LT112 AND LT113) TRENCHER SPECIFICATIONS (CONT’D)

Hydraulic System


Flow Range 34 - 57 L/min (9 - 15 U.S. gpm) 34 - 57 L/min (9 - 15 U.S. gpm)

Maximum Operating Pressure 20684 KPa (207 bar) (3000 psi) 20684 KPa (207 bar) (3000 psi)


(MX112) TRENCHER SPECIFICATIONS

Dimensions

• Where applicable, specifications conform to SAE and ISO standards and are subject to change without notice.

Performance

DESCRIPTION MX112 (2 FT)

Overall Length (A) 1732 mm (68.2 in)

Standard Boom Length (B) 1000 mm (39.4 in)

Digging Depth @ 60° (C) .6 m (2 ft)

Frame Width (D) 777 mm (30.6 in)

Auger Clearance (E) 351 - 401 mm (13.8 - 15.8 in)

P-94703

60°

E

D

A B

C


Operating Weight (Without Teeth) 256 kg (570 lb)

Chain Size 42 mm (1.654 in)

Chain Width 101 - 203 mm (4 - 8 in)

Chain Speed @ 15 U.S. gpm (57 L/min) 105.2 m/min (345 ft/min)

Chain Tightener Grease Cylinder

Auger Diameter 305 mm (12.0 in)


(MX112) TRENCHER SPECIFICATIONS (CONT’D)

Hydraulic System


Flow Range 49 - 76 L/min (13 - 20 U.S. gpm)

Maximum Operating Pressure 20684 KPa (207 bar) (3000 psi)


WARRANTY

WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .149


WARRANTY

WARRANTYBobcat Attachments

Bobcat Company warrants to its authorized dealers and authorized dealers of Bobcat Equipment Ltd.,who in turn warrant to the original owner, that each new Bobcat attachment will be free from provendefects in material and workmanship for twelve (12) months after delivery by the authorized Bobcatdealer to the original buyer.

During the warranty period, the authorized Bobcat dealer shall repair or replace, at Bobcat Company’soption, without charge for parts and labor, any part of the Bobcat product which fails because ofdefects in material or workmanship. The owner shall provide the authorized Bobcat dealer with promptwritten notice of the defect and allow reasonable time for replacement or repair. Bobcat Company may,at its option, require failed parts to be returned to the factory. Travel time of mechanics andtransportation of the Bobcat product to the authorized Bobcat dealer for warranty work are theresponsibility of the owner. The remedies provided in this warranty are exclusive.

This warranty does not cover replacement of scheduled service items and high wear items. The ownershall rely solely on the warranty, if any, of the respective manufacturers thereof. This warranty does notcover damages resulting from abuse, accidents, alterations, use of the Bobcat product as anattachment on any equipment not approved by Bobcat Company, air flow obstructions, or failure tomaintain or use the Bobcat product according to the instructions applicable to it.

THIS WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES AND CONDITIONS,EXCEPT THE WARRANTY OF TITLE. BOBCAT COMPANY DISCLAIMS ALL OTHER WARRANTIES ANDCONDITIONS, EXPRESS OR IMPLIED, INCLUDING ANY IMPLIED WARRANTIES OR CONDITIONS OFMERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL BOBCATCOMPANY OR THE AUTHORIZED BOBCAT DEALER BE LIABLE FOR ANY SPECIAL, INCIDENTAL,INDIRECT OR CONSEQUENTIAL DAMAGES, WHATSOEVER, INCLUDING, BUT NOT LIMITED TO, LOSSOR INTERRUPTION OF BUSINESS, LOST PROFITS, OR LOSS OF MACHINE USE, WHETHER BASEDON CONTRACT, WARRANTY, TORT, NEGLIGENCE, STRICT LIABILITY, STATUTE OR OTHERWISE,EVEN IF BOBCAT COMPANY OR THE AUTHORIZED BOBCAT DEALER HAS BEEN ADVISED OF THEPOSSIBILITY OF SUCH DAMAGES. THE TOTAL LIABILITY OF BOBCAT COMPANY AND THEAUTHORIZED BOBCAT DEALERS WITH RESPECT TO THE PRODUCT AND SERVICES FURNISHEDHEREUNDER SHALL NOT EXCEED THE PURCHASE PRICE OF THE PRODUCT UPON WHICH SUCHLIABILITY IS BASED.

Printed in U.S.A.6570124 (2-09)


ALPHABETICAL INDEX

(LT112 AND LT113) TRENCHER SPECIFICATIONS . . . . . . . . . . . . . . . . . . . 143(MX112) TRENCHER SPECIFICATIONS . 145ATTACHMENT IDENTIFICATION . . . . . . . . . . 8ATTACHMENT SIGNS (DECALS) . . . . . . . . 18ATTACHMENT STORAGE AND RETURN TO SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . 135BOBCAT COMPANY IS IS0 9001 CERTIFIED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

DAILY INSPECTION . . . . . . . . . . . . . . . . . . . 23DELIVERY REPORT . . . . . . . . . . . . . . . . . . . 7FEATURES AND ACCESSORIES . . . . . . . . 10FIRE PREVENTION . . . . . . . . . . . . . . . . . . . 15LIFTING THE ATTACHMENT . . . . . . . . . . . . 87LT112 AND MX112 DOUBLE STANDARD PATTERNS . . . . . . . . . . . . . . . . . . . . . . . . . 112LT112 AND MX112 SINGLE STANDARD PATTERNS . . . . . . . . . . . . . . . . . . . . . . . . . 101LT112 SHARK PATTERNS . . . . . . . . . . . . . 129LT113 DOUBLE STANDARD PATTERNS . 118LT113 SHARK PATTERNS . . . . . . . . . . . . . 132LT113 SINGLE STANDARD PATTERNS . . 105LUBRICATING THE ATTACHMENT . . . . . . . 96MACHINE SIGN TRANSLATIONS . . . . . . . 139MAINTENANCE SAFETY . . . . . . . . . . . . . . 93OPERATING PROCEDURE WITH EXCAVATORS . . . . . . . . . . . . . . . . . . . . . . . 38OPERATING PROCEDURE WITH LOADERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

OPERATING PROCEDURE WITH MINI TRACK LOADERS . . . . . . . . . . . . . . . . . . . . 69PUBLICATIONS AND TRAINING RESOURCES . . . . . . . . . . . . . . . . . . . . . . . . 17REMOVAL AND INSTALLATION OF AUGER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

REMOVAL AND INSTALLATION OF DIGGING CHAIN TEETH . . . . . . . . . . . . . . . . . . . . . . 100REMOVAL AND INSTALLATION OF DIGGING CHAIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98SAFETY INSTRUCTIONS . . . . . . . . . . . . . . 13SERIAL NUMBER LOCATION . . . . . . . . . . . . 7TRANSPORTING THE ATTACHMENT AND MACHINE ON A TRAILER . . . . . . . . . . . . . . 90TRANSPORTING THE ATTACHMENT ON A TRAILER . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

TROUBLESHOOTING . . . . . . . . . . . . . . . . . 95WARRANTY . . . . . . . . . . . . . . . . . . . . . . . .149


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