Bobcat 337 AAC811001+ Factory Service & Work Shop Manual

6986746 (5-10) Printed in U.S.A. © Bobcat Company 2010 Service Manual 337, 341 Compact Excavator 337 - S/N AAC811001 & Above 337 - S/N A9W711001 & Above 341 - S/N A9W911001 & Above

MAINTENANCE SAFETY Never service the Bobcat Excavator without instructions. Have good ventilation when welding or grinding painted parts. Wear dust mask when grinding painted parts. Toxic dust and gas can be produced. Stop, cool and clean engine of flammable materials before checking fluids. Never service or adjust machine with the engine running unless instructed to do so in the manual. Avoid contact with leaking hydraulic fluid or diesel fuel under pressure. It can penetrate the skin or eyes. Never fill fuel tank with engine running, while smoking, or when near open flame. Always lower the bucket and blade to the ground before doing any maintenance. Never modify equipment or add attachments not approved by Bobcat Company. Keep body, jewelry and clothing away from moving parts, electrical contact, hot parts and exhaust. Wear eye protection to guard from battery acid, compressed springs, fluids under pressure and flying debris when engines are running or tools are used. Use eye protections approved for type of welding. Keep tailgate closed except for service. Close and latch tailgate before operating the excavator. Vent exhaust to outside when engine must be run for service. Exhaust system must be tightly sealed. Exhaust fumes can kill without warning. Cleaning and maintenance are required daily. MSW28-0409 Use the correct procedure to lift and support the excavator. Lead-acid batteries produce flammable and explosive gases. Keep arcs, sparks, flames and lighted tobacco away from batteries. Batteries contain acid which burns eyes or skin on contact. Wear protective clothing. If acid contacts body, flush well with water. For eye contact flush well and get immediate medical attention. WARNING Instructions are necessary before operating or servicing machine. Read and understand the Operation & Maintenance Manual, Operator’s Handbook and signs (decals) on machine. Follow warnings and instructions in the manuals when making repairs, adjustments or servicing. Check for correct function after adjustments, repairs or service. Untrained operators and failure to follow instructions 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 & Maintenance Manual must be performed ONLY BY QUALIFIED BOBCAT SERVICE PERSONNEL. Always use genuine Bobcat replacement 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, 60-01 AIR CONDITIONING SERVICE .............................. 70-01 AIR CONDITIONING SYSTEM FLOW ................... 70-01 ALTERNATOR ....................................................... 50-01 ANGLE BLADE ....................................................... 40-01 ANGLE BLADE ASSEMBLY ................................... 40-01 ANGLE BLADE CUTTING EDGE ........................... 40-01 ANGLE BLADE CYLINDER .................................... 20-01 ANGLE BLADE VALVE ........................................... 20-01 ARM ....................................................................... 40-01 ARM CYLINDER .................................................... 20-01 BASIC TROUBLESHOOTING ................................ 70-01 BATTERY ................................................................ 50-01 BLADE ................................................................... 30-01 BLADE CONTROL .................................................. 40-01 BLADE CYLINDER ................................................. 20-01 BOOM ..................................................................... 40-01 BOOM CYLINDER .................................................. 20-01 BOOM SWING CYLINDER..................................... 20-01 BOOM SWING LOCK VALVE ................................. 20-01 BUCKET ................................................................. 40-01 BUCKET CYLINDER .............................................. 20-01 BUILD UP VALVE ................................................... 20-01 CAB......................................................................... 40-01 CASE DRAIN FILTER MOUNT ............................... 20-01 CLAMP.................................................................... 40-01 CLAMP CYLINDER ............................................... 20-01 COMPONENTS ...................................................... 70-01 COMPRESSOR ...................................................... 70-01 CONDENSOR......................................................... 70-01 CONTROL LINKAGE ASSEMBLY .......................... 40-01 CONTROL PATTERN SELECTOR VALVE ............. 20-01 CONVERSIONS ............................................... SPEC-01 COOLING SYSTEM................................................ 10-01 CROSSPORT RELIEF VALVE................................ 20-01 DELUXE INSTRUMENT PANEL SETUP................ 50-01 DIAGNOSTICS SERVICE CODE ........................... 50-01 DIRECT TO TANK VALVE ...................................... 20-01 DUAL SEQUENCE VALVE ..................................... 20-01 ELECTRICAL SYSTEM INFORMATION ................ 50-01 ENGINE .................................................................. 60-01 ENGINE ACCESSORY DRIVE BELT ..................... 10-01 ENGINE COMPONENTS AND TESTING .............. 60-01 ENGINE FLYWHEEL .............................................. 60-01 ENGINE LUBRICATION SYSTEM.......................... 10-01 ENGINE SPECIFICATIONS .............................. SPEC-01 ENGINE SPEED CONTROL ................................... 40-01 EVAPORATOR ........................................................ 70-01 EVAPORATOR/HEATER UNIT................................ 70-01 EXPANSION VALVE ................................................ 70-01 FLOORMAT AND FLOOR PLATE ........................... 40-01 FUEL, COOLANT AND LUBRICANTS ............. SPEC-01 FUEL LEVEL SENDER ........................................... 50-01 FUEL SYSTEM........................................................ 10-01 FUEL TANK ............................................................. 40-01 GENERAL AIR CONDITIONING SERVICE GUIDELINES ........................................................... 70-01 HEATER/AC FAN .................................................... 70-01 HEATER AIR FILTER ............................................. 10-01 HEATER COIL ......................................................... 70-01 HEATER VALVE ...................................................... 70-01 HORN ..................................................................... 40-01 HYDRAULIC CONNECTION SPECIFICATIONS... SPEC-01 HYDRAULIC CONTROL VALVE ............................. 20-01 HYDRAULIC FILTER MOUNT................................. 20-01 HYDRAULIC FLUID SPECIFICATIONS ............ SPEC-01 HYDRAULIC PUMP ................................................ 20-01 HYDRAULIC RESERVOIR ...................................... 20-01 HYDRAULIC SYSTEM ............................................ 10-01 HYDRAULIC SYSTEM INFORMATION ................. 20-01 HYDRAULIC X-CHANGE VALVE ........................... 20-01 LEFT CONSOLE ..................................................... 40-01 LEFT CONTROL LEVER (JOYSTICK) ................... 20-01 LIFTING AND BLOCKING THE EXCAVATOR ........ 10-01 LIFTING THE EXCAVATOR .................................... 10-01 LIGHTS.................................................................... 50-01 LUBRICATION OF THE EXCAVATOR .................... 10-01 MAIN RELIEF VALVE .............................................. 20-01 MANIFOLD ASSEMBLY/ACCUMULATOR ............. 20-01 MUFFLER................................................................ 60-01 OIL COOLER........................................................... 20-01 OPERATOR CAB .................................................... 10-01 PORT RELIEF VALVES........................................... 20-01 PRESSURE REDUCING VALVE............................. 20-01 PRESSURE RELIEF VALVE ................................... 70-01 PRESSURE SWITCH.............................................. 70-01 Continued On Next Page

337/341 Excavator ALPHABETICAL INDEX (CONT’D) RADIATOR............................................................... 60-01 RECEIVER/DRYER ................................................. 70-01 RECONDITIONING THE ENGINE .........................60-01 REGULAR MAINTENANCE .................................... 70-01 REMOVING AIR FROM HYDRAULIC SYSTEM ..... 20-01 RIGHT CONSOLE ................................................... 40-01 RIGHT CONTROL LEVER (JOYSTICK) ................. 20-01 RIGHT PEDAL AND LINKAGE................................ 40-01 RIGHT SIDE COVER .............................................. 10-01 ROPS CANOPY.......................................................40-01 SAFETY ................................................................... 70-01 SEAT AND SEAT MOUNT ...................................... 40-01 SEAT BELT .............................................................. 10-01 SERVICE SCHEDULE ............................................10-01 SPARK ARRESTOR MUFFLER ............................. 10-01 SPECIFICATIONS ............................................. SPEC-01 STARTER ................................................................ 50-01 SWING CIRCLE GEAR ........................................... 30-01 SWING FRAME ....................................................... 40-01 SWING MOTOR ..................................................... 20-01 SWING MOTOR DRIVE CARRIER ......................... 20-01 SWIVEL JOINT .......................................................20-01 SYSTEM CHARGING AND RECLAMATION .......... 70-01 SYSTEM TROUBLESHOOTING CHART ............... 70-01 TAILGATE..................................................... 10-01, 40-01 TEMPERATURE/PRESSURE................................. 70-01 THERMOSTAT ........................................................ 70-01 TORQUE SPECIFICATIONS ............................SPEC-01 TRACK DAMAGE IDENTIFICATION ...................... 30-01 TRACK FRAME ...................................................... 30-01 TRACK IDLER......................................................... 30-01 TRACK ROLLER ..................................................... 30-01 TRACKS .................................................................. 30-01 TRANSPORTING THE EXCAVATOR ..................... 10-01 TRAVEL CONTROLS.............................................. 40-01 TRAVEL CONTROL VALVE .................................... 20-01 TRAVEL MOTOR ......................................... 10-01, 20-01 TROUBLESHOOTING ............................................ 60-01 TWO SPEED SWITCH............................................ 50-01 UPPERSTRUCTURE .............................................. 40-01 X-CHANGE ............................................................ 40-01 X-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 AND MAINTENANCE HYDRAULIC SYSTEM UNDERCARRIAGE UPPERSTRUCTURE & SWING SECTION ELECTRICAL SYSTEM AND ANALYSIS ENGINE SERVICE SPECIFICATIONS HVAC

II 337/341 Excavator

III 337/341 Excavator FOREWORD This manual is for the Bobcat excavator mechanic. It provides necessary servicing and adjustment procedures 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 condition and is not modified. 9. Safety treads must be in good condition. 2. Check that ROPS/TOPS mounting hardware is tightened and is Bobcat approved. 10. Check for correct function of indicator lamps. 3. The seat belt must be correctly installed, functional and in good condition. 11. Check hydraulic fluid level, engine oil level and fuel supply. 4. Machine signs (decals) must be legible and in the correct location. 12. Inspect for fuel, oil or hydraulic fluid leaks. 5. Travel levers, control levers and foot pedals must return to neutral. Check that the pedal locks are in working order. 13. Lubricate the excavator. 6. Check for correct function of the work lights. 14. Check the condition of the battery and cables. 7. Enclosure door latches must open and close freely. 15. Inspect the air cleaner for damage or leaks. Check the condition of the element. 8. Attachment locking pins must function correctly and be in good condition. 16. Check the electrical charging system.

IV 337/341 Excavator FW EXC-0509 SM 17. Check tracks for wear and tension. Use only approved tracks. 21. Check the control console interlocks for correct function. 18. Inspect for loose or broken parts or connections. 22. Inspect the X-Change™ for wear or damage. Repair or replace damaged parts. 19. Check for any field modification not completed. 23. Check function or condition of all equipped options and accessories (examples: special applications kit, motion alarm, etc.). 20. Operate the machine and check all functions. 24. Recommend to the owner that all necessary corrections be made before the machine is returned to service. 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.

Bobcat 337 AAC811001+ Factory Service & Work Shop Manual

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