Komatsu PC128US-1 (SN from 01715) and PC128UU-1 (SN from 02347) Crawler Excavators (Japan) Workshop Manual (SEBM009805)

Illustrated factory Workshop Manual for Komatsu Crawler Excavators Models PC128US-1 and PC128UU-1.

This manual will assist you in diagnosing, repairing, and adjusting for your crawler excavator.
You can use a Windows, Mac, or Android device to view this manual. You only need to have a PDF reader installed.

Covered Models (Japan):
   PC128US-1 (SN: 01715-)
   PC128UU-1 (SN: 02347-)

Format: PDF, 794 pages
Language: English
Table of Contents:
   GENERAL
      GENERAL ASSEMBLY DRAWING
      SPECIFICATIONS
      WEIGHT TABLE
      LIST OF LUBRICANTS AND WATER
   STRUCTURE AND FUNCTION
      RADIATOR AND OIL COOLER
      PTO (COUPLING)
      ENGINE CONTROL
      POWER TRAIN SYSTEM
      SWING CIRCLE
      SWING MACHINERY
      TRACK FRAME
      IDLER CUSHION
      TRACK SHOE
      HYDRAULIC PIPING DRAWING
      HYDRAULIC CIRCUIT DIAGRAM
      HYDRAULIC TANK
      HYDRAULIC PUMP
      CONTROL VALVE
      CLSS
      SWING MOTOR
      TRAVEL MOTOR
      CENTER SWIVEL JOINT
      VALVE CONTROL
      PPC VALVE
      PPC SHUTTLE AND TRAVEL JUNCTION VALVE
      EPC SOLENOID VALVE
      BOOM HOLDING VALVE
      WORK EQUIPMENT
      AIR CONDITIONER
      ACTUAL ELECTRICAL WIRING DIAGRAM
      ELECTRONIC CIRCUIT DIAGRAM
      ELECTRONIC CONTROL SYSTEM
      MACHINE MONITORING SYSTEM
   TESTING AND ADJUSTING
      STANDARD VALUE TABLE FOR ENGINE RELATED PARTS
      STANDARD VALUE TABLE FOR CHASSIS RELATED PARTS
      STANDARD VALUE TABLE FOR ELECTRICAL RELATED PARTS (EXCEPT AUTOMATIC HORIZONTAL DIGGING MACHINE)
      STANDARD VALUE TABLE FOR ELECTRICAL RELATED PARTS
      TOOLS FOR TESTING, ADJUSTING AND TROUBLESHOOTING
      MEASURING ENGINE SPEED
      MEASURING EXHAUST COLOR
      ADJUSTMENT VALVE CLEARANCE
      MEASUREMENT BLOW-BY PRESSURE
      MEASUREMENT ENGINE OIL PRESSURE
      TESTING AND ADJUSTMENT OF FUEL INJECTION TIMING
      TESTING AND ADJUSTING AIR CONDITIONER COMPRESSOR BELT TENSION
      ADJUSTING ENGINE SPEED SENSOR
      ADJUSTING FUEL CONTROL CABLE
      ADJUSTING FUEL CONTROL CABLE
      ADJUSTING ENGINE STOP SOLENOID LINKAGE
      TESTING AND ADJUSTING HYDRAULIC PRESSURE IN WORK EQUIPMENT, SWING, TRAVEL CIRCUIT
      TESTING AND ADJUSTING OUTPUT PRESSURE OF PC VALVE (SERVO PISTON INPUT PRESSURE)
      TESTING AND ADJUSTING LS VALVE OUTPUT PRESSURE (SERVO PISTON INPUT PRESSURE) AND LS DIFFERENTIAL PRESSURE
      TESTING AND ADJUSTING CONTROL PUNP CIRCUIT OIL PRESSURE
      TESTING SOLENOID VALVE OUTPUT PRESSURE
      MEASURING PPC VALVE OUTPUT PRESSURE AND TESTING PPC SHUTTLE VALVE
      ADJUSTING WORK EQUIPMENT, SEING PPC VALVE
      TESTING AND ADJUSTING TRAVEL DEVIATION
      CHECKING LOCATION OF CAUSE OF HYDRAULIC DRIFT OF WORK EQUIPMENT
      MEASUREMENT OIL LEAKAGE OF SWING, TRAVEL MOTOR
      RELEASING REMAINING PRESSURE IN HYDRAULIC CIRCUIT
      TESTING CLEARANCE OF SWING CIRCLE BEARING
      TESTING AND ADJUSTING TRACK SHOE TENSION
      BLEEDING AIR
      PROCEDURE FOR RESETTING ELECTRICAL SYSTEM AND CHECKING OPERATION
      PROCEDURE FOR REPLACING POTENTIOMETER
      PREOCEDURE FOR CHECKING DIODE
      TROUBLESHOOTING
   DISASSEMBLY AND ASSEMBLY
      METHOD OF USING MANUAL
      PRECAUTIONS WHEN CARRYING OUT OPERATION
      SPECIAL TOOL LIST
      SKECHES OF SPECIAL TOOLS
      STARTING MOTOR
      ALTERNATOR
      ENGINE OIL COOLER
      FUEL INJECTION PUMP
      WATER PUMP
      NOZZLE HOLDER
      TURBOCHARGER
      THERMOSTAT
      CYLINDER HEAD
      ENGINE, MAIN PUMP
      RADIATOR, HYDRAULIC COOLER
      FUEL TANK
      CENTER SWIVEL JOINT
      SPROCKET
      TRAVEL MOTOR
      SWING MOTOR, SWINMG MACHINERY
      SWING MACHINERY
      SWING MOROR
      REVOLVING FRAME
      SWING CIRCLE
      IDLER, RECOIL SPRING
      RECOIL SPRING
      IDLER
      TRACK ROLLER
      CARRIER ROLLER
      SEEEL SHOE RUBBER PAD SHOE, LOAD LINER
      INTEGRATED RUBBER SHOE
      HYDRAULIC TANK
      MAIN PUMP
      CONTROL PUMP
      PC-EPC, LS-EPC VALVE
      PC VALVE
      LS VALVE
      CONTROL VALVE
      LS SELSECT VALVE
      LS SHUTTLE VALVE
      PRESSURE COMPENSATION VALVE
      MAIN RELIEF VALVE
      SOLENOID VALVE
      WORK EQUIPMENT LH.PPC VALVE (ARM, SWING)
      WORK EAUIPMENT R.H. PPC VALVE (BOOM, BUCKET)
      WORK EQUIPMENT PPC VALVE (BOOM, BUCKET, ARM, SWING)
      TRAVEL PPC VALVE
      PPC VALVE FPR OFFSET CONTROL
      BLADE PPC VALVE
      BOOM LOCK VALVE
      BOOM CYLINDER
      ARM CYLINDER
      BUCKET CYLINDER
      OFFSET CYLINDER
      BLADE CYLINDER
      HYDRAULIC CYLINDER
      WORK EQUIPMENT
      BUCKET
      ARM
      BUCKET, ARM
      SECOND BOOM
      ST BOOM
      BLADE
      OPERATOR`S CAB
      FLOOR FRAME
      AIR CONDITIONER COMPRESSOR
      AIR CONDENSER
      COUNTERWEIGHT
      CONTROLLER
      MONITOR
      CAR COOLER UNIT
   MAINTENANCE STANDARD
      SWING MACHINERY
      SWING CIRCLE
      TRACK FRAME
      IDLER
      CARRIER ROLLER
      TRACK ROLLER
      SPROCKET
      TRACK SHOE
      HYDRAULIC PUMP
      CONTROL VALVE
      SWING MOTOR
      TRAVEL MOTOR
      CENTER SWIVEL JOINT
      PPC VALVE
      PPC SHUTTLE・TRAVEL JUNCTION VALVE
      EPC SOLENOID VALVE
      BOOM HOLDING VALVE
      HYDRAULIC CYLINDER
      WORK EQUIPMENT
      DIMENSION OF WORK EQUIPMENT
   OTHERS
      HYDRAULIC PIPING DRAWING
      MACHINE EQUIPMENT WITH AUTOMATIC HORIZONTAL EXCAVATION CONTROL (PC128UU-1)
      HYDRAUIC CIRCUIT DIAGRAM (PC128UU-1)
      MACHINE EQUIPMENT WITH AUTOMATIC HORIZONTAL EXCAVATION CONTROL (PC128UU-1)
      CLSS
      ACTUAL ELECTRICAL WIRING DIAGRAM (PC128UU-1)
      ELECTRICAL CIRCUIT DIAGRAM (PC128UU-1)
      ELECTRONIC CONTRAL SYSTEM
      HYDRAUIC CIRCUIT DIAGRAM (PC128US-1)
      ELECTRICAL CIRCUIT DIAGRAM (PC128US-1)
      CONNECTOR ARRANGEMENT DIAGRAM