Komatsu WA420-3MC Wheel Loader Shop Manual CEBM003502

Description

• Model List:
  • WA420-3MC Wheel Loader

• 0.1. SPECIFICATION DRAWINGS
• 0.2. SPECIFICATIONS
• 0.3. WEIGHT TABLE
• 0.4. PROPER SELECTION OF FUEL, COOLANT AND LUBRICANTS
• 1. STRUCTURE AND FUNCTION
• 1.1. POWER TRAIN
• 1.2. POWER TRAIN SYSTEM
• 1.3. TORQUE CONVERTER, TRANSMISSION PIPING
• 1.4. TRANSMISSION HYDRAULIC SYSTEM DIAGRAM
• 1.5. TRANSMISSION HYDRAULIC CIRCUIT DIAGRAM
• 1.6. TORQUE CONVERTER
• 1.7. TORQUE CONVERTER OIL FILTER
• 1.8. TRANSMISSION
• 1.9. TRANSMISSION CONTROL VALVE
• 1.10. DRIVE SHAFT
• 1.11. FRONT AXLE
• 1.12. REAR AXLE
• 1.13. DIFFERENTIAL
• 1.14. FINAL DRIVE
• 1.15. AXLE MOUNT, CENTER HINGE PIN
• 1.16. STEERING PIPING
• 1.17. STEERING COLUMN
• 1.18. STEERING VALVE
• 1.19. OPERATION OF STEERING VALVE
• 1.20. ORBITROLL VALVE
• 1.21. STOP VALVE
• 1.22. GROUND DRIVEN STEERING PUMP (option)
• 1.23. DIVERTER VALVE (option)
• 1.24. BRAKE PIPING
• 1.25. BRAKE CIRCUIT DIAGRAM
• 1.26. BRAKE VALVE
• 1.27. ACCUMULATOR CHARGE VALVE
• 1.28. ACCUMULATOR (for brake)
• 1.29. SLACK ADJUSTER
• 1.30. BRAKE
• 1.31. PARKING BRAKE CONTROL
• 1.32. PARKING BRAKE
• 1.33. PARKING BRAKE SOLENOID VALVE
• 1.34. PARKING BRAKE VALVE
• 1.35. PARKING BRAKE EMERGENCY RELEASE SOLENOID VALVE
• 1.36. WORK EQUIPMENT HYDRAULIC SYSTEM DIAGRAM
• 1.37. HYDRAULIC PIPING
• 1.38. WORK EQUIPMENT HYDRAULIC CIRCUIT DIAGRAM
• 1.39. WORK EQUIPMENT LEVER LINKAGE
• 1.40. HYDRAULIC TANK
• 1.41. PPC VALVE
• 1.42. PPC RELIEF VALVE
• 1.43. ACCUMULATOR (FOR PPC VALVE)
• 1.44. MAIN CONTROL VALVE
• 1.45. MAIN CONTROL VALVE OPERATION
• 1.46. WORK EQUIPMENT LINKAGE
• 1.47. BUCKET
• 1.48. BUCKET POSITIONER AND BOOM KICKOUT
• 1.49. ROPS CAB
• 1.50. AIR CONDITIONER
• 1.51. ELECTRIC CIRCUIT DIAGRAM
• 1.52. ELECTRIC CIRCUIT DIAGRAM ECSS
• 1.53. MACHINE MONITOR SYSTEM
• 1.54. MAIN MONITOR
• 1.55. MAINTENANCE MONITOR
• 1.56. TRANSMISSION AUTOSHIFT CONTROL SYSTEM
• 1.57. ECSS (ELECTRONICALLY CONTROLLED SUSPENSION SYSTEM)
• 1.58. SENSORS
• 1.59. ENGINE STARTING CIRCUIT
• 1.60. ENGINE STOP CIRCUIT
• 1.61. ETHER START CIRCUIT
• 1.62. ELECTRIC TRANSMISSION CONTROL
• 1.63. KICKDOWN, HOLD SWITCH
• 1.64. KICKDOWN ELECTRIC CIRCUIT DIAGRAM
• 1.65. TRANSMISSION CUTOFF FUNCTION
• 1.66. ELECTRIC PARKING BRAKE CONTROL
• 2. TESTING, ADJUSTING, AND TROUBLESHOOTING
• 2.1. STANDARD VALUE TABLE FOR CHASSIS
• 2.2. SERVICE TOOLS FOR TESTING, ADJUSTING AND TROUBLESHOOTING
• 2.3. MEASURING ENGINE SPEEDS
• 2.4. MEASURING INTAKE MANIFOLD PRESSURE
• 2.5. MEASURING INTAKE AIR RESTRICTION
• 2.6. MEASURING ENGINE LUBRICATING OIL PRESSURE
• 2.7. MEASURING FUEL INLET RESTRICTION
• 2.8. MEASURING BLOWBY PRESSURE
• 2.9. MEASURING EXHAUST BACK PRESSURE
• 2.10. MEASURING COOLANT TEMPERATURE
• 2.11. MEASURING AND ADJUSTING VALVE CLEARANCE
• 2.12. MEASURING WASTEGATE ACTUATOR CALIBRATION
• 2.13. MEASURING EXHAUST COLOR
• 2.14. MEASURING ACCELERATOR PEDAL
• 2.15. OPERATING ANGLE OF ACCELERATOR PEDAL
• 2.16. MEASURING OPERATING FORCE, TRAVEL OF SPEED LEVER
• 2.17. MEASURING STALL SPEEDS
• 2.18. MEASURING TORQUE CONVERTER, TRANSMISSION, PARKING BRAKE OIL PRESSURE
• 2.19. METHOD OF OPERATING EMERGENCY MANUAL SPOOL
• 2.20. MEASURING CLEARANCE BETWEEN TIRE AND WHEEL
• 2.21. TESTING AND ADJUSTING STEERING WHEEL
• 2.22. TESTING AND ADJUSTING STEERING CONTROL
• 2.23. MEASURING STEERING OIL PRESSURE
• 2.24. METHOD OF MEASURING MAIN RELIEF PRESSURE
• 2.25. MEASURING OPERATING FORCE, TRAVEL OF BRAKE PEDAL
• 2.26. MEASURING BRAKE PERFORMANCE
• 2.27. TESTING BRAKE OIL PRESSURE
• 2.28. MEASURING BRAKE DISC WEAR
• 2.29. BLEEDING AIR FROM BRAKE SYSTEM
• 2.30. MEASURING PARKING BRAKE PERFORMANCE
• 2.31. MANUAL RELEASE OF PARKING BRAKE
• 2.32. MEASURING PARKING BRAKE DISC WEAR
• 2.33. MEASURING WORK EQUIPMENT CONTROL LEVER
• 2.34. MEASURING WORK EQUIPMENT HYDRAULIC PRESSURE
• 2.35. MEASURING WORK EQUIPMENT
• 2.36. MEASURING HYDRAULIC DRIFT WORK EQUIPMENT
• 2.37. TESTING AND ADJUSTING BUCKET POSITIONER
• 2.38. TESTING AND ADJUSTING BOOM KICKOUT
• 2.39. ADJUSTING MAIN MONITOR (SPEEDOMETER MODULE)
• 2.40. CHECKING FOR ABNORMALITY IN FUEL LEVEL SENSOR
• 2.41. TROUBLESHOOTING
• 3. DISASSEMBLY AND ASSEMBLY
• 3.1. METHOD OF USING MANUAL
• 3.2. SPECIAL TOOL LIST
• 3.3. TORQUE CONVERTER CHARGING PUMP
• 3.4. TORQUE CONVERTER TRANSMISSION
• 3.5. TORQUE CONVERTER
• 3.6. TRANSMISSION
• 3.7. TRANSMISSION CLUTCH PACK
• 3.8. PARKING BRAKE
• 3.9. TRANSMISSION CONTROL VALVE
• 3.10. TRANSMISSION ACCUMULATOR VALVE
• 3.11. FRONT DIFFERENTIAL
• 3.12. REAR DIFFERENTIAL
• 3.13. CENTER HINGE PIN
• 3.14. STEERING VALVE (ORBIT ROLL)
• 3.15. STEERING VALVE
• 3.16. STEERING DEMAND VALVE
• 3.17. STEERING, SWITCH PUMP
• 3.18. STEERING CYLINDER
• 3.19. BRAKE VALVE
• 3.20. RIGHT BRAKE VALVE (TANDEM)
• 3.21. LEFT BRAKE VALVE (SINGLE)
• 3.22. PARKING BRAKE DISC
• 3.23. HYDRAULIC TANK
• 3.24. WORK EQUIPMENT, PPC PUMP
• 3.25. MAIN CONTROL VALVE
• 3.26. BUCKET CYLINDER
• 3.27. BOOM CYLINDER
• 3.28. HYDRAULIC CYLINDER
• 3.29. MAINTENANCE MONITOR
• 3.30. AIR CONDITIONER UNIT
• 3.31. AIR CONDITIONER CONDENSER
• 3.32. DRY RECEIVER
• 3.33. AIR CONDITIONER COMPRESSOR
• 4. MAINTENANCE STANDARD
• 4.1. ENGINE MOUNT, TRANSMISSION MOUNT
• 4.2. TORQUE CONVERTER
• 4.3. TRANSMISSION
• 4.4. TRANSMISSION CONTROL VALVE
• 4.5. DRIVE SHAFTS
• 4.6. DIFFERENTIAL
• 4.7. LIMITED SLIP DIFFERENTIAL (OPTIONAL)
• 4.8. FINAL DRIVE
• 4.9. AXLE MOUNT
• 4.10. STEERING COLUMN
• 4.11. STEERING VALVE
• 4.12. STEERING CYLINDER MOUNT
• 4.13. GROUND DRIVEN STEERING PUMP (optional)
• 4.14. SLACK ADJUSTER
• 4.15. BRAKE VALVE
• 4.16. BRAKE
• 4.17. PARKING BRAKE
• 4.18. TORQUE CONVERTER, TRANSMISSION PUMP
• 4.19. HYDRAULIC PUMP (STEERING, SWITCH PUMP)
• 4.20. HYDRAULIC, PPC PUMP
• 4.21. PPC VALVE
• 4.22. CUTOFF VALVE
• 4.23. MAIN CONTROL VALVE
• 4.24. HYDRAULIC CYLINDER
• 4.25. CENTER HINGE PIN
• 4.26. WORK EQUIPMENT LINKAGE
• 4.27. BUCKET
• 4.28. BUCKET POSITIONER AND BOOM KICKOUT
• 5. OTHER
• 5.1. ELECTRICAL CIRCUIT DIAGRAM (1 OF 4) WA3203MC, WA3803MC, WA4203MC
• 5.2. ELECTRICAL CIRCUIT DIAGRAM (2 OF 4) WA3203MC, WA3803MC, WA4203MC
• 5.3. ELECTRICAL CIRCUIT DIAGRAM (3 OF 4) WA4203MC
• 5.4. ELECTRICAL CIRCUIT DIAGRAM (4 OF 4) WA4203MC