Komatsu WB140-2N, WB150-2N Backhoe Loader Shop Manual CEBM009802

Description

• Model List:
  • WB140-2N Backhoe Loader
  • WB150-2N Backhoe Loader

• 0.1. GENERAL
• 0.2. HOW TO READ THE SHOP MANUAL
• 0.3. HOISTING INSTRUCTIONS
• 0.4. COATING MATERIALS
• 0.5. STANDARD TIGHTENING TORQUE
• 0.6. ELECTRIC WIRE CODE
• 0.7. CONVERSION TABLES
• 1. STRUCTURE AND FUNCTION
• 1.1. POWER TRAIN
• 1.2. TRANSMISSION
• 1.3. FRONT AXLE
• 1.4. REAR AXLE
• 1.5. STEERING UNIT
• 1.6. HYDRAULIC CIRCUIT
• 1.7. SHOVEL CONTROL VALVE
• 1.8. BACKHOE CONTROL VALVE
• 1.9. CLSS (CLOSED CENTER LOAD SENSING SYSTEM
• 1.10. SOLENOID VALVE
• 1.11. SAFETY VALVE
• 1.12. BRAKE PUMP
• 1.13. SHOVEL CYLINDERS
• 1.14. BACKHOE CYLINDERS
• 1.15. FRONT WORKING EQUIPMENT
• 1.16. SWING BRACKET
• 1.17. BACKHOE WORKING EQUIPMENT
• 1.18. AIR CONDITIONING UNIT
• 2. TESTING, ADJUSTING AND TROUBLESHOOTING
• 2.1. STANDARD VALUE TABLES FOR ENGINE
• 2.2. STANDARD VALUE TABLE FOR CHASSIS
• 2.3. SPECIAL TOOLS
• 2.4. ENGINE SPEED
• 2.5. VALVE CLEARANCE
• 2.6. COMPRESSION PRESSURE
• 2.7. FUEL INJECTION TIMING
• 2.8. FAN AND ALTERNATOR DRIVE BELT
• 2.9. COMPRESSOR DRIVE BELT
• 2.10. ACCELERATOR PEDAL AND LEVER TRAVEL
• 2.11. BRAKE PEDAL TRAVEL AND MICROSWITCHES
• 2.12. BLEEDING AIR
• 2.13. ATTACHMENTS HYDRAULIC CIRCUIT
• 2.14. LOAD SENSING SIGNAL (LS VALVE)
• 2.15. UNLOADING VALVE
• 2.16. UNLOADING VALVE FUNCTION
• 2.17. PRIORITY VALVE
• 2.18. STEERING CONTROL SYSTEM PRESSURE
• 2.19. BRAKE SYSTEM
• 2.20. ENGINE SPEED UNDER LOAD
• 2.21. POWER TRAIN GROUP
• 2.22. POWER TRAIN CLUTCHES
• 2.23. SENSOR FOR RETURN TO DIG DEVICE
• 2.24. CAUSES OF HYDRAULIC DRIFT
• 2.25. AIR CONDITIONING UNIT
• 2.26. FRONT AXLE
• 2.27. REAR AXLE
• 2.28. TRANSMISSION
• 3. DISASSEMBLY AND ASSEMBLY
• 3.1. METHOD OF USING THIS MANUAL
• 3.2. PRECAUTIONS DURING SERVICE OR REPAIR OPERATIONS
• 3.3. ENGINE COMPONENTS
• 3.4. FRONT END LOADER CYLINDER LOCK
• 3.5. STARTER, ALTERNATOR AND COMPRESSOR
• 3.6. BATTERY DISCONNECT SWITCH
• 3.7. FRONT COUNTERWEIGHT
• 3.8. RADIATOR, CONDENSER AND OIL COOLERS
• 3.9. MUFFLER AND EXHAUST STACK
• 3.10. ENGINE HOOD AND OPERATORS CAB
• 3.11. AIR CONDITIONING AND HEATER
• 3.12. FUEL AND HYDRAULIC OIL TANKS
• 3.13. ENGINE AND TRANSMISSION
• 3.14. TORQUE CONVERTER
• 3.15. STEERING COLUMN AND COLUMN CONTROLS
• 3.16. MASTER BRAKE CYLINDER
• 3.17. FRONT END LOADER CONTROL VALVE
• 3.18. FRONT AXLE ASSEMBLY
• 3.19. REAR AXLE
• 3.20. FRONT BUCKET BOOM CYLINDERS
• 3.21. FRONT BUCKET TILT CYLINDER
• 3.22. FRONT BUCKET
• 3.23. FRONT WORKING EQUIPMENT
• 3.24. BACKHOE CONTROL VALVE
• 3.25. BACKHOE BOOM CYLINDER
• 3.26. BACKHOE ARM CYLINDER
• 3.27. TELESCOPIC ARM CYLINDER
• 3.28. BACKHOE BUCKET CYLINDER
• 3.29. OUTRIGGER CYLINDERS
• 3.30. BACKHOE SWING CYLINDERS
• 3.31. CYLINDERS (FRONT BUCKET RAISE AND TILT, BOOM, ARM, OUTRIGGERS, AND TELESCOPIC ARM)
• 3.32. CYLINDER (BOOM SWING)
• 3.33. BOOM SAFETY CYLINDER
• 3.34. BACKHOE WORK EQUIPMENT
• 3.35. TELESCOPIC ARM (COMPLETE)
• 3.36. BACKHOE BOOM
• 3.37. BACKHOE SWING BRACKET
• 3.38. BACKHOE OUTRIGGERS
• 4. OTHERS
• 4.1. HYDRAULIC CIRCUIT (WB1502N)
• 4.2. HYDRAULIC CIRCUIT (WB1402N)
• 4.3. ELECTRICAL SCHEMATIC