Komatsu WB70A-1 Backhoe Loader Shop Manual WEBM003200

Description

• Model List:
  • WB70A-1 Backhoe Loader

• 1. COVER
• 1.1. CONTENTS
• 1.2. LIST OF REVISED PAGES
• 1.3. SAFETY
• 1.4. FOREWORD
• 1.5. HOW TO READ THE SHOP MANUAL
• 1.6. HOISTING INSTRUCTIONS
• 1.7. STANDARD TIGHTENING TORQUE
• 1.8. COATING MATERIALS
• 1.9. ELECTRIC WIRE CODE
• 1.10. WEIGHT TABLE
• 1.11. TABLE OF OIL AND COOLANT QUANTITIES
• 1.12. STRUCTURE AND FUNCTION
• 1.12.2. POWER TRAIN
• 1.12.3. TRANSMISSION
• 1.12.4. AXLES
• 1.12.5. HYDROSTATIC TRANSMISSION
• 1.12.6. HYDROSTATIC TRANSMISSION PUMP
• 1.12.7. INCHING VALVE
• 1.12.8. TRAVEL MOTOR
• 1.12.9. STEERING SYSTEM
• 1.12.10. STEERING SYSTEM PUMP
• 1.12.11. STEERING UNIT
• 1.12.12. PRIORITY VALVE
• 1.12.13. FRAMES KNUCKLE AND JOINT
• 1.12.14. HYDRAULIC CIRCUIT DIAGRAM
• 1.12.15. SPOOL CONTROL VALVE
• 1.12.16. SPOOL CONTROL VALVE
• 1.12.17. SPOOL CONTROL VALVE
• 1.12.18. VALVES
• 1.12.19. GEAR PUMP
• 1.12.20. OUTRIGGER SAFETY VALVES
• 1.12.21. BRAKE PUMP
• 1.12.22. FRONT EQUIPMENT CYLINDER
• 1.12.23. FRONT WORK EQUIPMENT
• 1.12.24. LOADER CONTROL LEVER
• 1.12.25. BACKHOE CYLINDER
• 1.12.26. BACKHOE WORK EQUIPMENT
• 1.12.27. BACKOHE CONTROL LEVER
• 1.12.28. SOLENOID VALVE
• 1.12.29. ELECTRIC DIAGRAM
• 1.13. TESTING AND ADJUSTMENTS
• 1.13.1. NORMAL OR STANDARD TECHNICAL DATA
• 1.13.2. SPECIAL TOOLS
• 1.13.3. MEASURING ENGINE SPEED
• 1.13.4. ADJUSTING VALVE CLEARANCE
• 1.13.5. MEASURING COMPRESSION PRESSURE
• 1.13.6. TESTING AND ADJUSTING FUEL INJECTION TIMING
• 1.13.7. CHECKING AND TIGHTENING THE FAN BELT
• 1.13.8. MEASURING ACCELERATOR PEDAL OPERATING FORCE AND ACCELERATION LEVER
• 1.13.9. ADJUSTING INCH PEDAL TRAVEL
• 1.13.10. ADJUSTING BRAKE PEDAL TRAVEL
• 1.13.11. TESTING FRAME ARTICULTATION CLEARANCE
• 1.13.12. AIR BLEEDING RELEASING RESIDUAL PRESSURE
• 1.13.13. CHECKING AND SETTING PRESSURE IN THE ATTACHMENTS HYDRAULIC CIRCUIT
• 1.13.14. TESTING AND ADJUSTING HYDROSTATIC TRANSMISSION
• 1.13.15. TESTING AND ADJUSTING TRAVEL MAXIMUM SPEED (UNIERSAL JOINT)
• 1.13.16. TESTING TRAVEL MOTOR LEAKEAGE
• 1.13.17. ADJUSTING TRANSMISSION SENSOR
• 1.13.18. TESTING PRIORITY VALVE OPERATION
• 1.13.19. TESTING AND SETTING STEERING CONTROL SYSTEM PRESSURE
• 1.13.20. TESTING STEERING CYLINDER LEAKAGE
• 1.13.21. TESTING BRAKE SYSTEM
• 1.13.22. ADJUSTING PARKING BRAKE LEVER
• 1.13.23. CHECKING WEAR IN THE BRAKE DISKS
• 1.13.24. ANALYSIS OF CAUSES HYDRAULIC DRIFTS
• 1.13.25. ADJUSTING OF CYLINDER DRAFT OF BACKFRAME LOCKING
• 1.14. DISASSEMBLY AND ASSEMBLY
• 1.14.1. HOW TO READ THE MANUAL
• 1.14.2. PRECAUSIONS TO BE TAKEN WHILE WORKING
• 1.14.3. SPECIAL TOOLS (For machine)
• 1.14.4. SPECIAL TOOLS (For backhoe)
• 1.14.5. RADIATOR OIL COOLER UNIT
• 1.14.6. MUFFLER
• 1.14.7. SEAT AND ENGINE HOOD
• 1.14.8. SIDE COVER
• 1.14.9. HEATING RADIATOR
• 1.14.11. FUEL TANK
• 1.14.12. HYDRAULIC OIL TANK
• 1.14.13. ENGINE PUMP GROUP
• 1.14.14. PISTON PUMP AND STEERING PUMP
• 1.14.15. PISTON PUMP
• 1.14.16. ENGINEPUMP COUPLING JOINT
• 1.14.17. TRAVEL MOTOR
• 1.14.18. STEERING PUMP
• 1.14.19. STEERING GEAR PUMP
• 1.14.20. WORK EQUIPMENT PUMP
• 1.14.21. BRAKE PUMP
• 1.14.22. TRANSMISSIONREVERSE, DIRECTION INDICATOR AND HEADLING DIPPER BEAM CONTROL GROUP
• 1.14.23. STEERING UNIT
• 1.14.24. PRIORITY VALVE
• 1.14.25. FRONT EQUIPMENT CONTROL VALVE
• 1.14.26. FRONT AXLE
• 1.14.27. REAR AXLE
• 1.14.28. AXLES
• 1.14.29. TRANSMISSION
• 1.14.30. FRAME JOINT PIN
• 1.14.31. FRONT BUCKET LIFT ARM CYLINDERS
• 1.14.32. FRONT BUCKET DUMPING CYLINDER
• 1.14.33. STEERING CYLINDERS
• 1.14.34. FRAME OSCILLATING LOCK CYLINDER
• 1.14.35. MACHINE CYLINDERS
• 1.14.36. FRAME OSCILLATING LOCK CYLINDER
• 1.14.37. FRONT BUCKET
• 1.14.38. TILT LEVER AND BUCKET LINK
• 1.14.39. FRONT BUCKET LIFT ARM
• 1.14.40. BACKHOE CONTROL VALVE
• 1.14.41. BACKHOE BOOM CYLINDER
• 1.14.42. BACKHOE ARM CYLINDER
• 1.14.43. BACKHOE BUCKET CYLINDER
• 1.14.44. BACKHOE SWING CYLINDERS
• 1.14.45. HOUTRIGGER CYLINDERS
• 1.14.46. BACKHOE BACKFRAME LOCK CYLINDERS
• 1.14.47. BACKHOE CYLINDERS (boom, arm, bucket, outrigger, jig arm)
• 1.14.48. BOOM SWING CYLINDER
• 1.14.49. BACKHOE EQUIPMENT
• 1.15. MAINTENANCE STANDARD
• 1.15.2. TRANSMISSION
• 1.15.3. AXLES
• 1.15.4. HYDROSTATIC TRANSMISSION PUMP
• 1.15.5. TRAVEL MOTOR
• 1.15.6. STEERING PUMP (P2)
• 1.15.7. SPOOL CONTROL VALVE
• 1.15.8. BRAKE PUMP
• 1.15.9. OUTRIGGER SAFETY VALVES
• 1.15.10. STEERING AND FRONT WORK EQUIPMENT CYLINDERS
• 1.15.11. BACKHOE CYLINDERS
• 1.15.12. FRAME KNUCKLE AND JOINT
• 1.15.13. BACKHOE FRAME
• 1.15.14. FRONT WORK EQUIPMENT
• 1.15.15. BACKFRAME AND BRACKET
• 1.15.16. BACKHOE WORK EQUIPMENT