Komatsu WA420-3-MC (SN from A31001) 4WD Wheeled Loaders (Japan) Workshop Manual (CEBM003502)

Illustrated factory Workshop Manual for Komatsu 4WD Wheeled Loaders Models WA420-3-MC.

This manual will assist you in diagnosing, repairing, and adjusting for your 4wd wheeled loader.
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Covered Models (Japan):
   WA420-3-MC (SN: A31001-)

Format: PDF, 780 pages
Language: English
Table of Contents:
   FOREWORD
   GENERAL
      SPECIFICATION DRAWINGS
      SPECIFICATIONS
      WEIGHT TABLE
      PROPER SELECTION OF FUEL, COOLANT AND LUBRICANTS
   STRUCTURE AND FUNCTION
      POWER TRAIN
      POWER TRAIN SYSTEM
      TORQUE CONVERTER, TRANSMISSION PIPING
      TRANSMISSION HYDRAULIC SYSTEM DIAGRAM
      TRANSMISSION HYDRAULIC CIRCUIT DIAGRAM
      TORQUE CONVERTER
      TORQUE CONVERTER OIL FILTER
      TRANSMISSION
      TRANSMISSION CONTROL VALVE
      DRIVE SHAFT
      FRONT AXLE
      REAR AXLE
      DIFFERENTIAL
      FINAL DRIVE
      AXLE MOUNT, CENTER HINGE PIN
      STEERING PIPING
      STEERING COLUMN
      STEERING VALVE
      OPERATION OF STEERING VALVE
      ORBIT-ROLL VALVE
      STOP VALVE
      GROUND DRIVEN STEERING PUMP (option)
      DIVERTER VALVE (option)
      BRAKE PIPING
      BRAKE CIRCUIT DIAGRAM
      BRAKE VALVE
      ACCUMULATOR CHARGE VALVE
      ACCUMULATOR (for brake)
      SLACK ADJUSTER
      BRAKE
      PARKING BRAKE CONTROL
      PARKING BRAKE
      PARKING BRAKE SOLENOID VALVE
      PARKING BRAKE VALVE
      PARKING BRAKE EMERGENCY RELEASE SOLENOID VALVE
      WORK EQUIPMENT HYDRAULIC SYSTEM DIAGRAM
      HYDRAULIC PIPING
      WORK EQUIPMENT HYDRAULIC CIRCUIT DIAGRAM
      WORK EQUIPMENT LEVER LINKAGE
      HYDRAULIC TANK
      PPC VALVE
      PPC RELIEF VALVE
      ACCUMULATOR (FOR PPC VALVE)
      MAIN CONTROL VALVE
      MAIN CONTROL VALVE OPERATION
      WORK EQUIPMENT LINKAGE
      BUCKET
      BUCKET POSITIONER AND BOOM KICK-OUT
      ROPS CAB
      AIR CONDITIONER
      ELECTRIC CIRCUIT DIAGRAM
      ELECTRIC CIRCUIT DIAGRAM ECSS
      MACHINE MONITOR SYSTEM
      MAIN MONITOR
      MAINTENANCE MONITOR
      TRANSMISSION AUTO-SHIFT CONTROL SYSTEM
      ECSS (ELECTRONICALLY CONTROLLED SUSPENSION SYSTEM)
      SENSORS
      ENGINE STARTING CIRCUIT
      ENGINE STOP CIRCUIT
      ETHER START CIRCUIT
      ELECTRIC TRANSMISSION CONTROL
      KICK-DOWN, HOLD SWITCH
      KICK-DOWN ELECTRIC CIRCUIT DIAGRAM
      TRANSMISSION CUT-OFF FUNCTION
      ELECTRIC PARKING BRAKE CONTROL
   TESTING, ADJUSTING, AND TROUBLESHOOTING
      STANDARD VALUE TABLE FOR CHASSIS
      SERVICE TOOLS FOR TESTING, ADJUSTING AND TROUBLESHOOTING
      MEASURING ENGINE SPEEDS
      MEASURING INTAKE MANIFOLD PRESSURE
      MEASURING INTAKE AIR RESTRICTION
      MEASURING ENGINE LUBRICATING OIL PRESSURE
      MEASURING FUEL INLET RESTRICTION
      MEASURING BLOW-BY PRESSURE
      MEASURING EXHAUST BACK PRESSURE
      MEASURING COOLANT TEMPERATURE
      MEASURING AND ADJUSTING VALVE CLEARANCE
      MEASURING WASTEGATE ACTUATOR CALIBRATION
      MEASURING EXHAUST COLOR
      MEASURING ACCELERATOR PEDAL
      OPERATING ANGLE OF ACCELERATOR PEDAL
      MEASURING OPERATING FORCE, TRAVEL OF SPEED LEVER
      MEASURING STALL SPEEDS
      MEASURING TORQUE CONVERTER, TRANSMISSION, PARKING BRAKE OIL PRESSURE
      METHOD OF OPERATING EMERGENCY MANUAL SPOOL
      MEASURING CLEARANCE BETWEEN TIRE AND WHEEL
      TESTING AND ADJUSTING STEERING WHEEL
      TESTING AND ADJUSTING STEERING CONTROL
      MEASURING STEERING OIL PRESSURE
      METHOD OF MEASURING MAIN RELIEF PRESSURE
      MEASURING OPERATING FORCE, TRAVEL OF BRAKE PEDAL
      MEASURING BRAKE PERFORMANCE
      TESTING BRAKE OIL PRESSURE
      MEASURING BRAKE DISC WEAR
      BLEEDING AIR FROM BRAKE SYSTEM
      MEASURING PARKING BRAKE PERFORMANCE
      MANUAL RELEASE OF PARKING BRAKE
      MEASURING PARKING BRAKE DISC WEAR
      MEASURING WORK EQUIPMENT CONTROL LEVER
      MEASURING WORK EQUIPMENT HYDRAULIC PRESSURE
      MEASURING WORK EQUIPMENT
      MEASURING HYDRAULIC DRIFT WORK EQUIPMENT
      TESTING AND ADJUSTING BUCKET POSITIONER
      TESTING AND ADJUSTING BOOM KICKOUT
      ADJUSTING MAIN MONITOR (SPEEDOMETER MODULE)
      CHECKING FOR ABNORMALITY IN FUEL LEVEL SENSOR
      TROUBLESHOOTING
   DISASSEMBLY AND ASSEMBLY
      METHOD OF USING MANUAL
      SPECIAL TOOL LIST
      STARTING MOTOR
      ALTERNATOR
      ENGINE
      RADIATOR
      ENGINE
      TORQUE CONVERTER CHARGING PUMP
      TORQUE CONVERTER & TRANSMISSION
      TORQUE CONVERTER
      TRANSMISSION
      TRANSMISSION CLUTCH PACK
      PARKING BRAKE
      TRANSMISSION CONTROL VALVE
      TRANSMISSION ACCUMULATOR VALVE
      DRIVE SHAFT
      FRONT AXLE
      REAR AXLE
      FRONT DIFFERENTIAL
      REAR DIFFERENTIAL
      DIFFERENTIAL
      FINAL DRIVE
      CENTER HINGE PIN
      STEERING VALVE (ORBIT ROLL)
      STEERING VALVE
      STEERING DEMAND VALVE
      STEERING, SWITCH PUMP
      STEERING CYLINDER
      BRAKE VALVE
      RIGHT BRAKE VALVE (TANDEM)
      LEFT BRAKE VALVE (SINGLE)
      SLACK ADJUSTER
      BRAKE
      PARKING BRAKE DISC
      HYDRAULIC TANK
      WORK EQUIPMENT, PPC PUMP
      PPC VALVE
      MAIN CONTROL VALVE
      BUCKET CYLINDER
      BOOM CYLINDER
      HYDRAULIC CYLINDER
      WORK EQUIPMENT
      COUNTERWEIGHT
      FUEL TANK
      CAB
      MAIN MONITOR
      MAINTENANCE MONITOR
      AIR CONDITIONER UNIT
      AIR CONDITIONER CONDENSER
      DRY RECEIVER
      AIR CONDITIONER COMPRESSOR
   MAINTENANCE STANDARD
      ENGINE MOUNT, TRANSMISSION MOUNT
      TORQUE CONVERTER
      TRANSMISSION
      TRANSMISSION CONTROL VALVE
      DRIVE SHAFTS
      DIFFERENTIAL
      LIMITED SLIP DIFFERENTIAL (OPTIONAL)
      FINAL DRIVE
      AXLE MOUNT
      STEERING COLUMN
      STEERING VALVE
      STEERING CYLINDER MOUNT
      GROUND DRIVEN STEERING PUMP (optional)
      SLACK ADJUSTER
      BRAKE VALVE
      BRAKE
      PARKING BRAKE
      TORQUE CONVERTER, TRANSMISSION PUMP
      HYDRAULIC PUMP (STEERING, SWITCH PUMP)
      HYDRAULIC, PPC PUMP
      PPC VALVE
      CUT-OFF VALVE
      MAIN CONTROL VALVE
      HYDRAULIC CYLINDER
      CENTER HINGE PIN
      WORK EQUIPMENT LINKAGE
      BUCKET
      BUCKET POSITIONER AND BOOM KICK-OUT
   OTHER
      ELECTRICAL CIRCUIT DIAGRAM (1 OF 4) WA320-3MC, WA380-3MC, WA420-3MC
      ELECTRICAL CIRCUIT DIAGRAM (2 OF 4) WA320-3MC, WA380-3MC, WA420-3MC
      ELECTRICAL CIRCUIT DIAGRAM (3 OF 4) WA420-3MC
      ELECTRICAL CIRCUIT DIAGRAM (4 OF 4) WA420-3MC