Komatsu PC250-6, PC250LC-6 Hydraulic Excavator Shop Manual SEBM023200

Description

• Model List:
  • PC250-6 Hydraulic Excavator
  • PC250LC-6 Hydraulic Excavator

• 1. COVER
• 2. CONTENTS
• 3. GENERAL
• 3.1. SPECIFICATION DIMENSION DRAWINGS
• 3.2. SPECIFICATIONS
• 3.3. WEIGHT TABLE
• 3.4. FUEL,COOLANT AND LUBRICANTS
• 4. STRUCTURE AND FUNCTION
• 4.1. ENGINE RELATED PARTS
• 4.2. REDIATOR
• 4.3. RADIATOROIL COOLERAFTERCOOLER
• 4.4. POWER TRAIN
• 4.5. FINAL DRIVE
• 4.6. SWING CIRCLE
• 4.7. SWING MACHINERY
• 4.8. TRACK FRAME,RECOIL SPRING
• 4.9. TRACK SHOE
• 4.10. HYDRAULIC PIPING DRAWING
• 4.11. HYDRAULIC TANK
• 4.12. HYDRAULIC PUMP
• 4.13. LINE OIL FILTER
• 4.14. CONTROL VALVE
• 4.15. SELFREDUCING PRESSURE VALVE
• 4.16. CLSS
• 4.17. SWING MOTOR
• 4.18. CENTER SWIVEL JOINT
• 4.19. TRAVEL MOTOR
• 4.20. VALVE CONTROL
• 4.21. WORK EQUIPMENTSWING PPC VALVE
• 4.22. TRAVEL PPC VALVE
• 4.23. SERVICE PPC VALVE
• 4.24. SAFETY LOCK VALVE
• 4.25. PPC ACCUMULATOR
• 4.26. STRAIGHTTRAVEL SYSTEM
• 4.27. SOLENOID VALVE
• 4.28. BOOM HOLDING VALVE
• 4.29. ADDITIONAL FILTER FOR BREAKER
• 4.30. WORK EQUIPMENT
• 4.31. AIR CONDITIONER
• 4.32. ACTUAL ELECTRIC WIRING DIAGRAM
• 4.33. ENGINE CONTROL SYSTEM
• 4.34. ELECTRONIC CONTROL SYSTEM
• 4.35. MONITOR SYSTEM
• 4.36. SENSORS
• 4.37. FRONT WINDOW AUTO PULLUP SYSTEM
• 5. TESTING AND ADJUSTING
• 5.1. TABLE OF JUDGEMENT STANDARD VALUE
• 5.2. STANDARD VALUE TABLE FOR ELECTRICAL PARTS
• 5.3. TESTING AND ADJUSTING
• 5.3.1. TOOLS FOR TESTING,ADJUSTING,AND TROUBLESHOOTING
• 5.3.2. MEASURING ENGINE SPEED
• 5.3.3. MEASURING EXHAUST GAS COLOR
• 5.3.4. ADJUSTING VALVE CLEARANCE
• 5.3.5. MEASURING COMPRESSION PRESSURE
• 5.3.6. MEASURING BLOWBY PRESSURE
• 5.3.7. TESTING AND ADJUSTING FUEL INJECTION TIMING
• 5.3.8. MEASURING ENGINE OIL PRESSURE
• 5.3.9. TESTING AND ADJUSTING ALTERNATOR BELT TENSION
• 5.3.10. TESTING AND ADJUSTING BELT TENSION FOR AIR CONDITIONER COMPRESSOR
• 5.3.11. MEASURING SPEED SENSOR
• 5.3.12. TESTING AND ADJUSTING GOVERNOR MOTOR LEVER STROKE
• 5.3.13. TESTING AND ADJUSTING HYDRAULIC PRESSURE IN WORK EPUIPMENT,SWING,TRAVEL,CIRCUIT
• 5.3.14. TESTING AND ADJUSTING PC VALVE OUTPUT PRESSURE (SERVO PISTON INPUIT PRESSURE)
• 5.3.15. TESTING AND ADJUSTING LS VALVE OUTPUT PRESSURE (SERVO PISTON INPUT PRESSURE)AND LS DIFFERENTIAL PRESSURE
• 5.3.16. TESTING AND ADJUSTING CONTROL CIRCUIT OIL PRESSURE
• 5.3.17. TESTING SOLENOID VALVE OUTPUT PRESSURE
• 5.3.18. MEASURING PPC VALVE OUTPUT PRESSURE
• 5.3.19. ADJUSTING WORK EQUIPMENTSWING PPC VALVE
• 5.3.20. TESTING TRAVEL DEVIATION
• 5.3.21. TESTING LOCATIONS CAUSING HYDRAULIC DRIFT OF WORK EQUIPMENT
• 5.3.22. MEASURING OIL LEAKAGE
• 5.3.23. RELEASING REMAINING PRESSURE IN HYDRAULIC CIRCUIT
• 5.3.24. TESTING CLEARANCE OF SWING CIRCLE BEARING
• 5.3.25. TESTING AND ADJUSTING TRACK SHOE TENSION
• 5.3.26. BLEEDING AIR
• 5.4. TROUBLESHOOTING
• 5.4.1. POINTS TO REMEMBER WHEN TROUBLESHOOTING
• 5.4.2. SEQUENCE OF EVENTS IN TROUBLESHOOTING
• 5.4.3. POINTS TO REMEMBER WHEN CARRYING OUT MAINTENANCE
• 5.4.4. CHECKS BEFORE TROUBLESHOOTING
• 5.4.5. CONNECTOR TYPES AND MOUNTING LOCATIONS
• 5.4.6. CONNECTION TABLE FOR CONNECTOR PIN NUMBERS
• 5.4.7. EXPLANATION OF CONTROL MECHANISM FOR ELECTRICAL SYSTEM
• 5.4.8. DISPLAY METHOD AND SPECIAL FUNCTIONS OF MONITOR PANEL
• 5.4.9. METHOD OF USING JUDGEMENT TABLE
• 5.4.10. METHOD OF USING TROUBLESHOOTING CHARTS
• 5.4.11. DETAILS OF TROUBLESHOOTING AND TROUBLESHOOTING PROCEDURE
• 5.4.12. SERVICE CODE TABLE
• 5.4.13. TROUBLESHOOTING OF COMMUNICATION ABNORMALITY SYSTEM (N MODE)
• 5.4.14. TROUBLESHOOTING OF ENGINE THROTTLEPUMP CONTROLLER (GOVERNOR CONTROL SYSTEM) (E MODE)
• 5.4.15. TROUBLESHOOTING OF ENGINE SYSTEM (S MODE)
• 5.4.16. TROUBLESHOOTING OF ENGINE THROTTLEPUMP CONTROLLER (PUMP CONTROL SYSTEM) (C MODE)
• 5.4.17. TROUBLESHOOTING OF ENGINE THROTTLEPUMP CONTROLLER (INPUT SIGNAL SYSTEM) (F MODE)
• 5.4.18. TROUBLESHOOTING OF HYDRAULIC AND MECHANICAL SYSTEM (H MODE)
• 5.4.19. TROUBLESHOOTING OF MACHINE MONITOR SYSTEM (M MODE)
• 6. DISASSEMBLY AND ASSEMBLY
• 6.1. METHOD OF USING MANUAL
• 6.2. PRECAUTIONS WHEN CARRYING OUT OPERATION
• 6.3. SPECIAL TOOL LIST
• 6.4. SKETCHES OF SPECIAL TOOLS
• 6.5. STARTING MOTOR
• 6.5.1. REMOVAL AND INSTALLATION
• 6.6. ALTERNATOR
• 6.6.1. REMOVAL AND INSTALLATION
• 6.7. AIR CONDITIONER COMPRESSOR
• 6.7.1. REMOVAL AND INSTALLATION
• 6.8. AIR CONDITIONER CONDENSER
• 6.8.1. REMOVAL AND INSTALLATION
• 6.9. DRY RECEIVER
• 6.9.1. REMOVAL AND INSTALLATION
• 6.10. ENGINE OIL COOLER CORE
• 6.10.1. REMOVAL AND INSTALLATION
• 6.11. FUEL INJECTION PUMP
• 6.11.1. REMOVAL AND INSTALLATION
• 6.12. TURBOCHARGER
• 6.12.1. REMOVAL AND INSTALLATION
• 6.13. THERMOSTAT
• 6.13.1. REMOVAL
• 6.13.2. INSTALLATION
• 6.14. GOVERNOR MOTOR
• 6.14.1. REMOVAL AND INSTALLATION
• 6.15. CYLINDER HEAD
• 6.15.1. REMOVAL
• 6.15.2. INSTALLATION
• 6.16. HYDRAULIC OIL COOLER
• 6.16.1. REMOVAL AND INSTALLATION
• 6.17. RADIATOR,HYDRAULIC OIL COOLER
• 6.17.1. REMOVAL
• 6.17.2. INSTALLATION
• 6.18. ENGINE,MAIN PUMP
• 6.18.1. REMOVAL
• 6.18.2. INSTALLATION
• 6.19. DAMPER
• 6.19.1. REMOVAL AND INSTALLATION
• 6.20. FUEL TANK
• 6.20.1. REMOVAL AND INSTALLATION
• 6.21. CENTER SWIVEL JOINT
• 6.21.1. REMOVAL
• 6.21.2. INSTALLATION
• 6.21.3. DISASSEMBLY AND ASSEMBLY
• 6.22. FINAL DRIVE
• 6.22.1. REMOVAL AND INSTALLATION
• 6.22.2. REMOVAL AND INSTALLATION
• 6.23. SWING MOTOR AND SWING MACHINERY
• 6.23.1. REMOVAL
• 6.23.2. INSTALLATION
• 6.24. SWING MACHINERY
• 6.25. REVOLVING FRAME
• 6.25.1. REMOVAL
• 6.25.2. INSTALLATION
• 6.26. SWING CIRCLE
• 6.26.1. REMOVAL AND INSTALLATION
• 6.27. IDLER,RECOIL SPRING
• 6.27.1. REMOVAL AND INSTALLATION
• 6.27.2. REMOVAL AND INSTALLATION
• 6.27.3. DISASSEMBLY
• 6.27.4. ASSEMBLY
• 6.28. CARRIER ROLLER
• 6.28.1. REMOVAL AND INSTALLATION
• 6.28.2. DISASSEMBLY
• 6.28.3. ASSEMBLY
• 6.29. TRACK SHOE
• 6.29.1. REMOVAL AND INSTALLATION
• 6.30. MAIN PUMP INPUT SHAFT OIL SEAL
• 6.30.1. REMOVAL AND INSTALLATION
• 6.31. PUMP MERGEDIVIDER VALVE
• 6.31.1. DISASSEMBLY AND ASSEMBLY
• 6.32. MAIN RELIEF VALVE
• 6.32.1. DISASSEMBLY AND ASSEMBLY
• 6.33. PC VALVE
• 6.33.1. REMOVAL
• 6.33.2. INSTALLATION
• 6.34. LS VALVE
• 6.34.1. REMOVAL AND INSTALLATION
• 6.35. PC, LSEPC VALVE
• 6.35.1. REMOVAL AND INSTALLATION
• 6.36. SOLENOID VALVE
• 6.36.1. REMOVAL AND INSTALLATION
• 6.37. WORK EQUIPMENTSWING PPC VALVE
• 6.37.1. REMOVAL AND INSTALLATION
• 6.37.2. DISASSEMBLY
• 6.37.3. ASSEMBLY
• 6.38. TEAVEL PPC VALVE
• 6.38.1. REMOVAL AND INSTALLATION
• 6.38.2. DISASSEMBLY
• 6.39. BOOM LOCK VALVE
• 6.39.1. REMOVAL AND INSTALLATION
• 6.40. BUCKET CYLINDER
• 6.40.1. REMOVAL
• 6.40.2. INSTALLATION
• 6.41. HYDRAULIC CYLINDER
• 6.41.1. DISASSEMBLY
• 6.41.2. ASSEMBLY
• 6.42. WORK EQUIPMENT
• 6.42.1. REMOVAL AND INSTALLATION
• 6.43. ENGINE THROTTLEPUMP CONTROLLER
• 6.43.1. REMOVAL AND INSTALLATION
• 6.44. CONTROL STAND CASE
• 6.44.1. REMOVAL
• 6.44.2. INSTALLATION
• 6.45. MONITOR
• 6.45.1. REMOVAL AND INSTALLATION
• 7. MAINTENANCE STANDARD
• 7.1. SWING MACHINERY
• 7.2. FINAL DRIVE
• 7.3. SWING CIRCLE
• 7.4. TRACK FRAME AND RECOIL SPRING
• 7.5. SELFREDUCING PRESSURE VALVE
• 7.6. SWING MOTOR
• 7.7. TRAVEL MOTOR
• 7.8. WORK EQUIPMENTSWING PPC VALVE
• 7.9. TRAVEL PPC VALVE
• 7.10. SERVICE PPC VALVE
• 7.11. CENTER SWIVEL JOINT
• 7.12. BOOM HOLDING VALVE
• 7.13. HYDRAULIC CYLINDER
• 7.14. WORK EQUIPMENT
• 7.15. DIMENSION OF WORK EQUIPMENT
• 8. OTHERS
• 8.1. HYDRAULIC CIRCUIT DIAGRAM
• 8.2. ELECTRICAL CIRCUIT DIAGRAM (1/2)
• 8.3. ELECTRICAL CIRCUIT DIAGRAM (2/2)