Komatsu PC20-6, PC30-6, PC40-6 Hydraulic Excavator Shop Manual SEBM020R0604

Description

• Model List:
  • PC20-6 Hydraulic Excavator
  • PC30-6 Hydraulic Excavator
  • PC40-6 Hydraulic Excavator

• 1. COVER
• 2. CONTENTS
• 3. STRUCTURE AND FUNCTION
• 3.1. POWER TRAIN
• 3.2. SWING CIRCLE
• 3.3. SWING MACHINERY
• 3.4. SPROCKET
• 3.5. TRACK FRAME AND RECOIL SPRING
• 3.6. IDLER
• 3.7. TRACK ROLLER
• 3.8. TRACK SHOE
• 3.9. HYDRAULIC PIPING
• 3.10. HYDRAULIC CIRCUIT SCHEMATICS
• 3.11. HYDRAULIC CIRCUIT DIAGRAM
• 3.12. HYDRAULIC TANK
• 3.13. HYDRAULIC TRIPLE GEAR PUMP
• 3.14. SPOOL CONTROL VALVE
• 3.15. SPOOL CONTROL VALVE
• 3.16. SPOOL CONTROL VALVE
• 3.17. CENTER SWIVEL JOINT
• 3.18. SWING MOTOR
• 3.19. TRAVEL MOTOR (WITH REDUCTION GEAR)
• 3.20. VALVE CONTROL
• 3.21. WORK EQUIPMENT
• 3.22. ELECTRICAL CIRCUIT DIAGRAM
• 4. TESTING AND ADJUSTING
• 4.1. TABLE OF JUDGEMENT STANDARD VALVE
• 4.2. TESTING AND ADJUSTING TOOL LIST
• 4.3. ADJUSTING VALVE CLEARANCE (PC20,306)
• 4.4. ADJUSTING VALVE CLEARANCE (PC406)
• 4.5. MEASURING COMPRESSION PRESSURE
• 4.6. TESTING AND ADJUSTING FUEL INJECTION TIMING (PC20,306)
• 4.7. TESTING AND ADJUSTING FUEL INJECTION TIMING (PC406)
• 4.8. BLEEDING AIR FROM HYDRAULIC CYLINDERS
• 4.9. MEASURING AND ADJUSTING HYDRAULIC PRESSURE
• 4.10. MEASURING HYDRAULIC PRESSURE OF ACCELERATION CIRCUIT (PC30,406)
• 4.11. MEASURING DISCHARGE AMOUNT OF PUMP
• 4.12. MEASURING OIL LEAKAGE FROM SWING, TRAVEL MOTORS
• 4.13. TESTING FOR LEAKAGE OF OIL FROM CENTER SWIVEL JOINT (PC206)
• 4.14. TESTING FOR LEAKAGE OF OIL FROM CENTER SWIVEL JOINT (PC306)
• 4.15. TESTING FOR LEAKAGE OF OIL FROM CENTER SWIVEL JOINT (PC406)
• 4.16. MEASURING LEAKAGE FROM HYDRAULIC CYLINDERS
• 4.17. TROUBLESHOOTING
• 4.17.1. PREPARATION OF TROUBLESHOOTING
• 4.17.2. HOW TO USE DIAGNOSTIC TABLE
• 4.17.3. PREVENTING RECURRENCE OF THE SAME TROUBLE
• 4.17.3.1. WORK EQUIPMENT, SWING, AND TRAVEL DO NOT MOVE, OR SPEED IS EXTREMELY SLOW
• 4.17.3.2. ARM IN (OUT) LACKS POWER (INCLUDING LACK OF SPEED)
• 4.17.3.3. BUCKET CURL (DUMP), BOOM RAISE (PUSHING UP CHASSIS), AND BOOM SWING LACK POWER (INCLUDING LACK OF SPEED)
• 4.17.3.4. ARM IN (OUT) OPERATION IS IMPOSSIBLE
• 4.17.3.5. BUCKET CURL (DUMP), BOOM RAISE (LOWER), BOOM SWING OPERATION IS IMPOSSIBLE
• 4.17.3.6. EXCESSIVE HYDRAULIC DRIFT OF WORK EQUIPMENT (BOOM, ARM, BUCKET, BLADE, BOOM SWING)
• 4.17.3.7. BLADE LACKS POWER (INCLUDING LACK OF SPEED)
• 4.17.3.8. BLADE OPERATION IS IMPOSSIBLE
• 4.17.3.9. LEFT (RIGHT) BOOM SWING LACKS POWER (INCLUDING LACK OF SPEED)
• 4.17.3.10. SWING OPERATION IS IMPOSSIBLE TO LEFT (OR RIGHT)
• 4.17.3.11. EXCESSIVE OVERRUN OF SWING ON SLOPES (HYDRAULIC DRIFT OF SWING)
• 4.17.3.12. EXCESSIVE OVERRUN WHEN SWING IS STOPPED
• 4.17.3.13. MACHINE NATURALLY DEVIATES TO ONE SIDE WHEN TRAVELING
• 4.17.3.14. MACHINE DOES NOT TRAVEL FORWARD (IN REVERSE)
• 4.17.3.15. TRAVEL SPEED DOES NOT CHANGE (PC30.406)
• 5. DISASSEMBLY AND ASSEMBLY
• 5.1. METHOD OF READING MANUAL
• 5.2. TABLE OF SPECIAL TOOLS
• 5.3. FUEL INJECTION PUMP
• 5.3.1. REMOVAL (PC20.306)
• 5.3.2. INSTALLATION (PC20.306)
• 5.3.3. REMOVAL (PC406)
• 5.3.4. INSTALLATION (PC406)
• 5.4. HYDRAULIC OIL COOLER
• 5.4.1. REMOVAL (PC20,306)
• 5.4.2. INSTALLATION (PC20,306)
• 5.4.3. REMOVAL (PC406)
• 5.4.4. INSTALLATION (PC406)
• 5.5. SWING CIRCLE
• 5.5.1. REMOVAL
• 5.5.2. INSTALLATION
• 5.6. SWING MACHINERY
• 5.6.1. REMOVAL
• 5.6.2. INSTALLATION
• 5.6.3. DISASSEMBLY (PC20.306)
• 5.6.4. ASSEMBLY (PC20.306)
• 5.6.5. DISASSEMBLY (PC406)
• 5.6.6. ASSEMBLY (PC406)
• 5.7. REVOLVING FRAME
• 5.8. IDLER, RECOIL SPRING
• 5.9. SPOOL CONTROL VALVE
• 5.9.1. REMOVAL
• 5.9.2. INSTALLATION
• 5.10. SPOOL CONTROL VALVE
• 5.10.1. REMOVAL
• 5.10.2. INSTALLATION
• 5.11. SPOOL CONTROL VALVE
• 5.11.1. REMOVAL
• 5.11.2. INSTALLATION
• 5.12. SPOOL CONTROL VALVE
• 5.12.1. DISASSEMBLY
• 5.12.2. ASSEMBLY
• 5.13. SPOOL CONTROL VALVE
• 5.14. CENTER SWIVEL JOINT
• 5.14.1. REMOVAL
• 5.14.2. INSTALLATION
• 5.14.3. DISASSEMBLY (PC20,306)
• 5.14.4. ASSEMBLY (PC20,306)
• 5.14.5. DISASSEMBLY (PC406)
• 5.14.6. ASSEMBLY (PC406)
• 5.15. TRAVEL MOTOR
• 5.15.1. REMOVAL
• 5.15.2. INSTALLATION
• 5.15.3. DISASSEMBLY (PC206)
• 5.15.4. ASSEMBLY (PC206)
• 5.15.5. DISASSEMBLY (PC30,406)
• 5.15.6. ASSEMBLY (PC30,406)
• 5.15.7. DISASSEMBLY (PC206)
• 5.15.8. ASSEMBLY (PC206)
• 5.15.9. DISASSEMBLY (PC306)
• 5.15.10. ASSEMBLY (PC306)
• 5.15.11. DISASSEMBLY (PC406)
• 5.15.12. ASSEMBLY (PC406)
• 5.16. BUCKET CYLINDER
• 5.17. BLADE CYLINDER
• 5.18. BOOM SWING CYLINDER
• 5.19. HYDRAULIC CYLINDER
• 5.19.1. DISASSEMBLY
• 5.19.2. ASSEMBLY
• 5.20. REPLACING HYDRAULIC CYLINDER PISTON RING
• 6. MAINTENANCE STANDARD
• 6.1. SWING CIRCLE
• 6.2. SWING MACHINERY
• 6.3. SPROCKET
• 6.4. TRACK FRAME AND RECOIL SPRING
• 6.5. IDLER
• 6.6. TRACK ROLLER
• 6.7. TRACK SHOE
• 6.8. TRIPLE GEAR PUMP
• 6.9. CENTER SWIVEL JOINT
• 6.10. SWING MOTOR
• 6.11. TRAVEL MOTOR BRAKE VALVE
• 6.12. SPOOL CONTROL VALVE
• 6.13. SPOOL CONTROL VALVE
• 6.14. SPOOL CONTROL VALVE
• 6.15. HYDRAULIC CYLINDER
• 6.16. WORK EQUIPMENT