Komatsu PC750LC-6K and PC750SE-6K (SN from K32001) Crawler Excavators (UK) Workshop Manual (UEBM001801)

Illustrated factory Workshop Manual for Komatsu Crawler Excavators Models PC750LC-6K and PC750SE-6K.

This manual will assist you in diagnosing, repairing, and adjusting for your crawler excavator.
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Covered Models (United Kingdom):
   PC750LC-6K (SN: K32001-)
   PC750SE-6K (SN: K32001-)

Format: PDF, 701 pages
Language: English
Table of Contents:
   GENERAL
      SPECIFICATION DRAWINGS
      FUEL, COOLANT AND LUBRICANTS
   PTO
   PTO LUBRICATION SYSTEM
   POWER TRAIN SWING MACHINERY SWING CIRCLE
   FINAL DRIVE
   TRACK FRAME AND RECOIL SPRING
   IDLER CARRIER ROLLER
   TRACK ROLLER
   TRACK SHOE ( 1/ 2)
   ( 2/ 2)
   MOTOR GREASE PUMP
   HYDRAULIC TANK
   HYDRAULIC PUMP
   LINE OIL FILTER
   PILOT OIL FILTER
   DRAIN OIL FILTER
   L. H. 5- SPOOL CONTROL VALVE
   R. H. 4- SPOOL CONTROL VALVE
   STRAIGHT- TRAVEL VALVE
   SWING MOTOR
   CENTER SWIVEL JOINT
   TRAVEL MOTOR
   PPC CONTROL RELIEF VALVE
   SAFETY LOCK VALVE
   PPC ACCUMULATOR
   VALVE CONTROL
   WORK EQUIPMENT, SWING PPC VALVE
   TRAVEL PPC VALVE
   SOLENOID VALVE
   HYDRAULIC CYLINDER
   WORK EQUIPMENT
   DIMENSIONS OF WORK EQUIPMENT
   AIR CONDITIONER
   ENGINE CONTROL
   MACHINE CONTROL SYSTEM
   MONITOR SYSTEM
   SENSORS
   TESTING AND ADJUSTING
      STANDARD VALUE TABLE FOR ENGINE
      STANDARD VALUE TABLE FOR CHASSIS
   STANDARD VALUE TABLE FOR ELECTRICAL PARTS
   TOOLS FOR TESTING, ADJUSTING, AND TROUBLESHOOTING
   MEASURING AIR SUPPLY PRESSURE ( BOOST PRESSURE)
   MEASURING EXHAUST TEMPERATURE
   MEASURING EXHAUST COLOR
   ADJUSTING VALVE CLEARANCE
   MEASURING BLOW- BY PRESSURE
   MEASURING COMPRESSION PRESSURE
   MEASURING ENGINE OIL PRESSURE
   HANDLING EQUIPMENT IN FUEL CIRCUIT
   RELEASING REMAINING PRESSURE IN FUEL SYSTEM
   MEASURING FUEL PRESSURE
   REDUCED CYLINDER MODE OPERATION FOR ENGINE
   BLEEDING AIR FROM FUEL CIRCUIT
   CHECKING FOR LEAKAGE IN FUEL CIRCUIT
   TESTING AND ADJUSTING ALTERNATOR BELT TENSION
   TESTING AND ADJUSTING FAN BELT TENSION
   TESTING AND ADJUSTING AIR CONDITIONER COMPRESSOR DRIVE BELT TENSION
   HANDLING ENGINE CONTROL- LER HIGH VOLTAGE CIRCUIT
   ADJUSTING ENGINE SPEED SENSOR
   TESTING AND ADJUSTING HYDRAULIC PRESSURE IN WORK EQUIPMENT, SWING, TRAVEL CIRCUIT
   TESTING AND ADJUSTING CONTROL PUMP CIRCUIT OIL PRESSURE
   TESTING AND ADJUSTING PISTON PUMP CONTROL PRESSURE
   MEASURING SERVO PISTON STROKE
   MEASURING PPC VALVE OUT- PUT PRESSURE
   TESTING SOLENOID VALVE OUTPUT PRESSURE
   ADJUSTING WORK EQUIP- MENT, SWING PPC VALVE
   TESTING TRAVEL DEVIATION
   TESTING LOCATIONS CAUSING HYDRAULIC DRIFT OF WORK EQUIPMENT
   MEASURING OIL LEAKAGE
   TESTING CLEARANCE OF SWING CIRCLE BEARING
   TESTING AND ADJUSTING TRACK SHOE TENSION
   BLEEDING AIR
   RELEASING REMAINING PRESSURE IN HYDRAULIC CIRCUIT
   PROCEDURE FOR CHECKING DIODE
   POINTS TO REMEMBER WHEN TROUBLESHOOTING
   SEQUENCE OF EVENTS IN TROUBLESHOOTING POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE CHECKS BEFORE TROUBLESHOOTING
   CONNECTOR TYPES AND MOUNTING LOCATIONS
   CONNECTION TABLE FOR CONNECTOR PIN NUMBERS
   EXPLANATION OF CONTROL MECHANISM FOR ELECTRICAL SYSTEM
   DISPLAY METHOD AND SPECIAL FUNCTIONS OF MONITOR PANEL
   METHOD OF USING JUDGEMENT TABLE
   METHOD OF USING TROUBLESHOOTING CHARTS
   DETAILS OF TROUBLESHOOTING AND TROUBLESHOOTING PROCEDURE
   ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE
   N- 1 [ E117, E118 occur at same time ] Monitor panel communication abnormality
   N- 2 [ E117, E218 occur at same time ] Engine controller communication abnormality
   N- 3 [ E118, E955 occur at same time ] Pump controller communication abnormality
   ACTION TAKEN BY CONTROLLER AND CONDITION OF MACHINE WHEN ERROR CODE IS DISPLAYED
   ACTION TAKEN BY CONTROLLER AND CONDITION OF MACHINE WHEN ERROR CODE IS DISPLAYED
   E- 1 [ E91b ] ( Abnormality in engine speed Ne sensor system) is displayed
   E- 2 [ E91C ] ( Abnormality in engine G rotation sensor system) is displayed
   E- 3 [ E920 ] ( Abnormality in model selection system) is displayed
   E- 4 [ E922 ] ( Engine overrun) is displayed
   E- 5 [ E924 ] ( Drop in engine oil pressure) is displayed
   E- 6 [ E931 ] ( Abnormality in fuel control dial sensor system) is displayed
   E- 7 [ E934 ] ( Abnormality in engine water high- temperature sensor system) is displayed
   E- 8 [ E936 ] ( Abnormality in engine oil pressure switch system) is displayed
   E- 9 [ E93C ] ( Abnormality in boost pressure sensor system) is displayed
   E- 10 [ E93d ] ( Abnormality in fuel temperature sensor system) is displayed
   E- 11 [ E954 ] ( Short circuit in starting switch C system) is displayed
   [ E955 ] ( Abnormality in network system) is displayed
   E- 13 [ E956 ] ( Power source system abnormality 1) is displayed
   E- 14 [ E957 ] ( Power source system abnormality 2) is displayed
   [ E95A ] ( Abnormality in fuel injection amount adjustment switch signal) is displayed
   E- 16 [ E96A ] ( Abnormality in engine water low- temperature sensor system) is displayed
   E- 17 [ E970 ] ( Excess current in fuel supply pump PCV1 system) is displayed
   E- 18 [ E971 ] ( Excess current in fuel supply pump PCV2 system) is displayed
   E- 19 [ E974 ] ( Disconnection in fuel supply pump PCV1 system) is displayed
   E- 20 [ E975 ] ( Disconnection in fuel supply pump PCV2 system) is displayed
   E- 21 [ E977 ] ( Abnormality in common rail fuel pressure sensor system) is displayed
   E- 22 [ E979 ] ( Common rail fuel high pressure abnormality 1) is displayed [ E97A ] ( Common rail fuel high pressure abnormality 2) is displayed
   E- 23 [ E97b ] ( Fuel supply pump non- force feed 1) is displayed [ E97C ] ( Fuel supply pump non- force feed 2) is displayed
   E- 24 [ E97d ] ( Abnormality in common rail fuel pressure) is displayed
   E- 25 [ E980 ] ( Defective engine controller) is displayed
   E- 26 [ E981 ] ( Disconnection in No. 1 fuel injector system) is displayed
   E- 27 [ E982 ] ( Disconnection in No. 2 fuel injector system) is displayed
   E- 28 [ E983 ] ( Disconnection in No. 3 fuel injector system) is displayed
   E- 29 [ E984 ] ( Disconnection in No. 4 fuel injector system) is displayed
   E- 30 [ E985 ] ( Disconnection in No. 5 fuel injector system) is displayed
   E- 31 [ E986 ] ( Disconnection in No. 6 fuel injector system) is displayed
   E- 32 [ E98A ] ( Short circuit in No. 1, No. 2, No. 3 fuel injector system) is displayed
   E- 33 [ E98b ] ( Short circuit in No. 3, No. 4, No. 5 fuel injector system) is displayed
   TROUBLESHOOTING OF PUMP CONTROLLER SYSTEM ( C MODE)
      POINTS TO REMEMBER WHEN TROUBLESHOOTING CONTROLLER SYSTEM
      ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE
      JUDGEMENT TABLE FOR PUMP CONTROLLER AND HYDRAULIC RELATED PARTS
   POINTS TO REMEMBER WHEN TROUBLESHOOTING CONTROLLER SYSTEM
   ACTION TAKEN BY CONTROLLER WHEN ABNORMALITY OCCURS AND PROBLEMS ON MACHINE
   JUDGEMENT TABLE FOR PUMP CONTROLLER AND HYDRAULIC RELATED PARTS
   C- 1 Abnormality in controller power source system ( controller LED is OFF)
      C- 1 Related electrical circuit diagram
      TROUBLESHOOTING C- 2
   C- 2 [ E232 ] Short circuit in pump TVC solenoid system is displayed
      TROUBLESHOOTING C- 2 C- 2 Related electrical circuit diagram TROUBLESHOOTING C- 3
   C- 3 [ E233 ] Disconnection in pump TVC solenoid system is displayed
      TROUBLESHOOTING C- 3 C- 3 Related electrical circuit diagram TROUBLESHOOTING C- 4
   C- 4 [ E203 ] Short circuit in swing holding brake solenoid system is displayed
      TROUBLESHOOTING C- 4 C- 4 Related electrical circuit diagram TROUBLESHOOTING C- 5
   C- 5 [ E213 ] Disconnection in swing holding brake solenoid system is displayed
      TROUBLESHOOTING C- 5 C- 5 Related electrical circuit diagram TROUBLESHOOTING C- 6
   C- 6 [ E201 ] Short circuit in CO cancel solenoid system is displayed
      C- 6 Related electrical circuit diagram
      TROUBLESHOOTING C- 7
   C- 7 [ E211 ] Disconnection in CO cancel solenoid system is displayed
      C- 7 Related electrical circuit diagram
      TROUBLESHOOTING C- 8
   C- 8 [ E202 ] Short circuit in straight- travel solenoid system is displayed
      C- 8 Related electrical circuit diagram
      TROUBLESHOOTING C- 9
   C- 9 [ E212 ] Disconnection in straight- travel solenoid system is displayed
      C- 9 Related electrical circuit diagram
      TROUBLESHOOTING C- 10
   C- 10 [ E204 ]