MAINTENANCE SAFETY

Never service the Bobcat Excavatorwithout instructions.

Have good ventilation whenwelding or grinding painted parts.Wear dust mask when grindingpainted parts. Toxic dust and gascan be produced.

Stop, cool and clean engine offlammable materials beforechecking fluids.Never service or adjust machinewith the engine running unlessinstructed to do so in themanual.Avoid contact with leakinghydraulic fluid or diesel fuelunder pressure. It can penetratethe skin or eyes.Never fill fuel tank with enginerunning, while smoking, or whennear open flame.

Always lower the bucket andblade to the ground before doingany maintenance.Never modify equipment or addattachments not approved byBobcat Company.

Keep body, jewelry and clothingaway from moving parts, electricalcontact, hot parts and exhaust. Wear eye protection to guard frombattery acid, compressed springs,fluids under pressure and flyingdebris when engines are runningor tools are used. Use eyeprotections approved for type ofwelding.Keep tailgate closed except forservice. Close and latch tailgatebefore operating the excavator.

Vent exhaust to outside whenengine must be run for service.Exhaust system must be tightlysealed. Exhaust fumes can killwithout warning.

Cleaning and maintenance arerequired daily.

MSW28-0409

Use the correct procedure to liftand support the excavator.

Lead-acid batteries produceflammable and explosive gases.Keep arcs, sparks, flames andlighted tobacco away frombatteries.Batteries contain acid whichburns eyes or skin on contact.Wear protective clothing. If acidcontacts body, flush well withwater. For eye contact flush welland get immediate medicalattention.

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

Maintenance procedures which are given in the Operation & Maintenance Manual can be performed by the owner/operator without any specific technical training. Maintenance procedures which are not in the Operation & MaintenanceManual must be performed ONLY BY QUALIFIED BOBCAT SERVICE PERSONNEL. Always use genuine Bobcatreplacement parts. The Service Safety Training Course is available from your Bobcat dealer.

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

P-90216

CORRECT

B-19964

CORRECT CORRECT

B-19959

B-19965

WRONG WRONG

B-19960 B-19966

WRONG

WRONG

B-19962 B-19958

WRONG

B-19798

WRONG

337/341 Excavator

ALPHABETICAL INDEX

AIR CLEANER ............................................. 10-01, 60-01AIR CONDITIONING SERVICE.............................. 70-01AIR CONDITIONING SYSTEM FLOW ................... 70-01ALTERNATOR ....................................................... 50-01ANGLE BLADE ....................................................... 40-01ANGLE BLADE ASSEMBLY................................... 40-01ANGLE BLADE CUTTING EDGE........................... 40-01ANGLE BLADE CYLINDER.................................... 20-01ANGLE BLADE VALVE ........................................... 20-01ARM ....................................................................... 40-01ARM CYLINDER .................................................... 20-01

BASIC TROUBLESHOOTING ................................ 70-01BATTERY................................................................ 50-01BLADE ................................................................... 30-01BLADE CONTROL.................................................. 40-01BLADE CYLINDER ................................................. 20-01BOOM ..................................................................... 40-01BOOM CYLINDER.................................................. 20-01BOOM SWING CYLINDER..................................... 20-01BOOM SWING LOCK VALVE ................................. 20-01BUCKET ................................................................. 40-01BUCKET CYLINDER .............................................. 20-01BUILD UP VALVE ................................................... 20-01

CAB......................................................................... 40-01CASE DRAIN FILTER MOUNT............................... 20-01CLAMP.................................................................... 40-01CLAMP CYLINDER ............................................... 20-01COMPONENTS ...................................................... 70-01COMPRESSOR ...................................................... 70-01CONDENSOR......................................................... 70-01CONTROL LINKAGE ASSEMBLY.......................... 40-01CONTROL PATTERN SELECTOR VALVE............. 20-01CONVERSIONS ...............................................SPEC-01COOLING SYSTEM................................................ 10-01CROSSPORT RELIEF VALVE................................ 20-01

DELUXE INSTRUMENT PANEL SETUP................ 50-01DIAGNOSTICS SERVICE CODE ........................... 50-01DIRECT TO TANK VALVE ...................................... 20-01DUAL SEQUENCE VALVE ..................................... 20-01

ELECTRICAL SYSTEM INFORMATION ................ 50-01ENGINE .................................................................. 60-01ENGINE ACCESSORY DRIVE BELT ..................... 10-01ENGINE COMPONENTS AND TESTING .............. 60-01ENGINE FLYWHEEL .............................................. 60-01ENGINE LUBRICATION SYSTEM.......................... 10-01

ENGINE SPECIFICATIONS .............................. SPEC-01ENGINE SPEED CONTROL ...................................40-01EVAPORATOR ........................................................70-01EVAPORATOR/HEATER UNIT................................70-01EXPANSION VALVE................................................70-01

FLOORMAT AND FLOOR PLATE...........................40-01FUEL, COOLANT AND LUBRICANTS ............. SPEC-01FUEL LEVEL SENDER ...........................................50-01FUEL SYSTEM........................................................10-01FUEL TANK .............................................................40-01

GENERAL AIR CONDITIONING SERVICE GUIDELINES...........................................................70-01

HEATER/AC FAN ....................................................70-01HEATER AIR FILTER .............................................10-01HEATER COIL.........................................................70-01HEATER VALVE ......................................................70-01HORN .....................................................................40-01HYDRAULIC CONNECTION SPECIFICATIONS... SPEC-01HYDRAULIC CONTROL VALVE .............................20-01HYDRAULIC FILTER MOUNT.................................20-01HYDRAULIC FLUID SPECIFICATIONS............ SPEC-01HYDRAULIC PUMP ................................................20-01HYDRAULIC RESERVOIR......................................20-01HYDRAULIC SYSTEM ............................................10-01HYDRAULIC SYSTEM INFORMATION .................20-01HYDRAULIC X-CHANGE VALVE ...........................20-01

LEFT CONSOLE .....................................................40-01LEFT CONTROL LEVER (JOYSTICK) ...................20-01LIFTING AND BLOCKING THE EXCAVATOR ........10-01LIFTING THE EXCAVATOR ....................................10-01LIGHTS....................................................................50-01LUBRICATION OF THE EXCAVATOR ....................10-01

MAIN RELIEF VALVE ..............................................20-01MANIFOLD ASSEMBLY/ACCUMULATOR .............20-01MUFFLER................................................................60-01

OIL COOLER...........................................................20-01OPERATOR CAB ....................................................10-01

PORT RELIEF VALVES...........................................20-01PRESSURE REDUCING VALVE.............................20-01PRESSURE RELIEF VALVE ...................................70-01PRESSURE SWITCH..............................................70-01

Continued On Next Page

337/341 Excavator

ALPHABETICAL INDEX (CONT’D)

RADIATOR...............................................................60-01RECEIVER/DRYER.................................................70-01RECONDITIONING THE ENGINE .........................60-01REGULAR MAINTENANCE ....................................70-01REMOVING AIR FROM HYDRAULIC SYSTEM .....20-01RIGHT CONSOLE ...................................................40-01RIGHT CONTROL LEVER (JOYSTICK) .................20-01RIGHT PEDAL AND LINKAGE................................40-01RIGHT SIDE COVER ..............................................10-01ROPS CANOPY.......................................................40-01

SAFETY...................................................................70-01SEAT AND SEAT MOUNT ......................................40-01SEAT BELT..............................................................10-01SERVICE SCHEDULE ............................................10-01SPARK ARRESTOR MUFFLER .............................10-01SPECIFICATIONS .............................................SPEC-01STARTER ................................................................50-01SWING CIRCLE GEAR ...........................................30-01SWING FRAME .......................................................40-01SWING MOTOR .....................................................20-01SWING MOTOR DRIVE CARRIER .........................20-01SWIVEL JOINT .......................................................20-01SYSTEM CHARGING AND RECLAMATION ..........70-01SYSTEM TROUBLESHOOTING CHART ...............70-01

TAILGATE.....................................................10-01, 40-01TEMPERATURE/PRESSURE................................. 70-01THERMOSTAT ........................................................ 70-01TORQUE SPECIFICATIONS ............................SPEC-01TRACK DAMAGE IDENTIFICATION ...................... 30-01TRACK FRAME ...................................................... 30-01TRACK IDLER.........................................................30-01TRACK ROLLER..................................................... 30-01TRACKS.................................................................. 30-01TRANSPORTING THE EXCAVATOR ..................... 10-01TRAVEL CONTROLS.............................................. 40-01TRAVEL CONTROL VALVE ....................................20-01TRAVEL MOTOR ......................................... 10-01, 20-01TROUBLESHOOTING ............................................ 60-01TWO SPEED SWITCH............................................ 50-01

UPPERSTRUCTURE.............................................. 40-01

X-CHANGE ............................................................ 40-01X-CHANGE (HYDRAULIC) .................................... 40-01

I 337/341 Excavator

CONTENTS

FOREWORD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . III

SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V

FIRE PREVENTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VII

SERIAL NUMBER LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . IX

DELIVERY REPORT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . X

BOBCAT EXCAVATOR IDENTIFICATION . . . . . . . . . . . . . . . . . . . .XI

SAFETY AND MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . 10-01

HYDRAULIC SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-01

UNDERCARRIAGE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-01

UPPERSTRUCTURE & SWING SECTION . . . . . . . . . . . . . . . . 40-01

ELECTRICAL SYSTEM AND ANALYSIS . . . . . . . . . . . . . . . . . . 50-01

ENGINE SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60-01

HEATING, VENTILATION, AIR CONDITIONING . . . . . . . . . . . . 70-01

SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SPEC-01

SAFETY ANDMAINTENANCE

HYDRAULICSYSTEM

UNDERCARRIAGE

UPPERSTRUCTURE& SWING SECTION

ELECTRICALSYSTEM AND ANALYSIS

ENGINESERVICE

SPECIFICATIONS

HVAC

II 337/341 Excavator

III 337/341 Excavator

FOREWORDThis manual is for the Bobcat excavator mechanic. It provides necessary servicing and adjustmentprocedures for the Bobcat excavator and its component parts and systems. Refer to the Operation &Maintenance Manual for operating instructions, starting procedure, daily checks, etc.

A general inspection of the following items must be made after the excavator has had service or repair:

FW EXC-0509 SM

1. Check that the ROPS/TOPS/FOPS is in good conditionand is not modified.

9. Safety treads must be in goodcondition.

2. Check that ROPS/TOPSmounting hardware istightened and is Bobcatapproved.

10. Check for correct function ofindicator lamps.

3. The seat belt must becorrectly installed, functionaland in good condition.

11. Check hydraulic fluid level,engine oil level and fuelsupply.

4. Machine signs (decals) mustbe legible and in the correctlocation.

12. Inspect for fuel, oil orhydraulic fluid leaks.

5. Travel levers, control leversand foot pedals must return toneutral. Check that the pedallocks are in working order.

13. Lubricate the excavator.

6. Check for correct function ofthe work lights.

14. Check the condition of thebattery and cables.

7. Enclosure door latches mustopen and close freely.

15. Inspect the air cleaner fordamage or leaks. Check thecondition of the element.

8. Attachment locking pins mustfunction correctly and be ingood condition.

16. Check the electrical chargingsystem.

IV 337/341 Excavator

FW EXC-0509 SM

17. Check tracks for wear andtension. Use only approvedtracks.

21. Check the control consoleinterlocks for correct function.

18. Inspect for loose or brokenparts or connections.

22. Inspect the X-Change™ for wear or damage. Repair or replace damaged parts.

19. Check for any fieldmodification not completed.

23. Check function or condition of all equipped options and accessories (examples: special applications kit, motion alarm, etc.).

20. Operate the machine andcheck all functions.

24. Recommend to the owner that all necessary corrections be made before the machine is returned to service.

CALIFORNIAPROPOSITION 65 WARNING

Diesel engine exhaust and some of itsconstituents are known to the state of California

to cause cancer, birth defects and otherreproductive harm.

V 337/341 Excavator

SAFETY INSTRUCTIONS

WARNINGInstructions are necessary before operating orservicing machine. Read and understand theOperation & Maintenance Manual, Operator’sHandbook and signs (decals) on machine. Followwarnings and instructions in the manuals whenmaking repairs, adjustments or servicing. Check forcorrect function after adjustments, repairs or service.Untrained operators and failure to follow instructionscan cause injury or death.

W-2003-0903

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 following publications provide information on thesafe use and maintenance of the Bobcat machine andattachments:

• The Delivery Report is used to assure that completeinstructions have been given to the new owner andthat the machine is in safe operating condition.

• The Operation & Maintenance Manual delivered withthe machine or attachment contains operatinginformation as well as routine maintenance andservice procedures. It is a part of the machine and canbe stored in a container provided on the machine.Replacement Operation & Maintenance Manuals canbe ordered from your Bobcat dealer.

• Machine signs (decals) instruct on the safe operationand care of your Bobcat machine or attachment. Thesigns and their locations are shown in the Operation& Maintenance Manual. Replacement signs areavailable from your Bobcat dealer.

• An Operator’s Handbook fastened to the operatorcab. It’s brief instructions are convenient to theoperator. The handbook is available from your dealerin an English edition or one of many other languages.See your Bobcat dealer for more information ontranslated versions.

• The AEM Safety Manual delivered with the machinegives general safety information.

• The Service Manual and Parts Manual are availablefrom your dealer for use by mechanics to do shop-type service and repair work.

• The Compact Excavator Operator Training Course isavailable through your local dealer or atwww.training.bobcat.com or www.bobcat.com.This course is intended to provide rules and practicesof correct operation of the Bobcat excavator. Thecourse is available in English and Spanish versions.

• Service Safety Training Courses are available fromyour Bobcat dealer or at www.training.bobcat.comor www.bobcat.com. They provide information forsafe and correct service procedures.

• The Bobcat compact excavator Safety Video isavailable from your Bobcat dealer or atwww.training.bobcat.com or www.bobcat.com.

SI EXC-0308 SM

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

Safety Alert Symbol

VI 337/341 Excavator

SAFETY INSTRUCTIONS (CONT’D)

The dealer and owner / operator review therecommended uses of the product when delivered. If theowner / operator will be using the machine for a differentapplication(s) he or she must ask the dealer forrecommendations on the new use.

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.).

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.

SI EXC-0308 SM

VII 337/341 Excavator

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 coolants 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.

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 Arrestor Exhaust System

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

SI EXC-0308 SM

VIII 337/341 Excavator

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.

SI EXC-0308 SM

IX 337/341 Excavator

SERIAL NUMBER LOCATIONS

Always use the serial number of the excavator 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.

Excavator Serial Number

Figure 1

The excavator serial number plate (Item 1) [Figure 1] islocated on the frame of the machine in the locationshown.

Explanation of Excavator Serial Number:

Engine Serial Number

Figure 2

Figure 3

The engine serial number (Item 1) [Figure 2] & [Figure3] is located on the engine in the location shown.

P-49090

1

XXXX XXXXX

Module 2. - Production Sequence (Series)

Module 1. - Model/ Engine Combination

1. The 4 digit Model/Engine Combination Module numberidentifies the model number and engine combination.

2. The 5 digit Production Sequence Number identifies theorder which the excavator is produced.

P-49091

1

P-49092

1

X 337/341 Excavator

DELIVERY REPORT

Figure 4

The delivery report must be filled out by the dealer andsigned by the owner or operator when the BobcatExcavator is delivered. An explanation of the form mustbe given to the owner. Make sure it is filled outcompletely [Figure 4].

B-16315

XI 337/341 Excavator

BOBCAT EXCAVATOR IDENTIFICATION

OPERATOR SEATWith SEAT BELT

BUCKETCYLINDER

TRACK FRAME

TAILGATE

BOOMCYLINDER

ARM CYLINDER

OPERATOR’SHANDBOOK

*CANOPY/CAB(ROPS/TOPS)

BLADECYLINDERS

BLADE

* FOGS (Falling Object Guards) is available from your Bobcat Excavator dealer.

X-CHANGE

BUCKETLINK

CONTROLLEVERS

(JOYSTICKS)

BUCKET

ARM

BOOM

TRACK

RIGHT SIDECOVER

B19945

B19947

UPPERSTRUCTURE

LIFT POINT

TIE DOWNS/LIFT POINTS

TRACK TIE DOWN

AUXILIARYQUICK

COUPLERS

XII 337/341 Excavator

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