Komatsu D21A-8, D21P-8 Shop Manual SEBM033605

Description

• Model List:
  • D21A-8
  • D21P-8

• 1. COVER
• 2. CONTENTS
• 3. GENERAL
• 3.1. SPECIFICATION DRAWINGS
• 3.2. SPECIFICATIONS
• 3.3. WEIGHT TABLE
• 3.4. FUEL, COOLANT AND LUBRICANTS
• 4. STRUCTURE AND FUNCTION
• 4.1. ENGINE CONTROL
• 4.2. POWER TRAIN SYSTEM
• 4.3. POWER TRAIN SKELETON
• 4.4. POWER TRAIN HYDRAULIC PIPING
• 4.5. DAMPER AND UNIVERSAL JOINT
• 4.6. TRANSMISSION CONTROL
• 4.7. TRANSMISSION PUMP
• 4.8. HYDROSHIFT TRANSMISSION
• 4.9. TRANSMISSION CONTROL VALVE
• 4.10. STEERING CLUTCH AND BRAKE CONTROL
• 4.11. STEERING CYLINDER
• 4.12. BRAKE CYLINDER
• 4.13. PPC VALVE
• 4.14. BEVEL GEAR SHAFT AND STEERING CLUTCH
• 4.15. STEERING BRAKE
• 4.16. FINAL DRIVE
• 4.17. TRACK FRAME
• 4.18. MAIN FRAME AND SUSPENSION
• 4.19. HYDRAULIC PIPING
• 4.20. HYDRAULIC CONTROL
• 4.21. HYDRAULIC TANK AND FILTER
• 4.22. HYDRAULIC CONTROL VALVE
• 4.23. OPERATION OF WORK EQUIPMENT CONTROL CIRCUIT
• 4.24. POWER ANGLE AND POWER TILTDOZER
• 4.25. ENGINE CONTROL
• 4.26. MONITOR SYSTEM
• 4.27. SENSORS
• 5. TESTING AND ADJUSTING
• 5.1. STANDARD VALUE TABLE FOR ENGINE
• 5.2. STANDARD VALUE TABLE FOR CHASSIS
• 5.3. TESTING AND ADJUSTING
• 5.3.1. LIST OF TESTING, ADJUSTING, AND TROUBLESHOOTING TOOLS
• 5.3.2. MEASURING ENGINE SPEED
• 5.3.3. MEASUREMENT OF EXHAUST GAS COLOR
• 5.3.4. ADJUSTING VALVE CLEARANCE
• 5.3.5. MEASURING COMPRESSION PRESSURE
• 5.3.6. TESTING AND ADJUSTING FUEL INJECTION TIMING
• 5.3.7. BLEEDING AIR FROM FUEL CIRCUIT
• 5.3.8. MEASURING ENGINE OIL PRESSURE
• 5.3.9. TESTING AND ADJUSTING FAN BELT TENSION
• 5.3.10. ADJUSTING FUEL CONTROL LINKAGE
• 5.3.11. MEASURING POWER TRAIN OIL PRESSURE
• 5.3.12. ADJUSTING PPC VALVE
• 5.3.13. BLEEDING AIR FROM STEERING CIRCUIT
• 5.3.14. MEASURING AND ADJUSTING WORK EQUIPMENT MAIN RELIEF PRESSURE
• 5.3.15. BLEEDING AIR FROM HYDRAULIC CYLINDERS
• 5.3.16. BLEEDING AIR FROM ANGLE CYLINDERS CIRCUIT
• 5.3.17. ADJUSTING FUEL CONTROL LEVER
• 5.3.18. ADJUSTING TRAVEL OF INCHING PEDAL
• 5.3.19. ADJUSTING BRAKE PEDAL, BRAKE CYLINDER
• 5.3.20. ADJUSTING BRAKE LINING CLEARANCE
• 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. CLASSIFICATION AND STEPS FOR TROUBLESHOOTING
• 5.4.6. TYPES AND LOCATIONS OF CONNECTORS
• 5.4.7. CONNECTION TABLE FOR CONNECTOR PIN NUMBERS
• 5.4.8. TBRANCH BOX AND TBRANCH TABLE
• 5.4.9. TROUBLESHOOTING OF ELECTRICAL SYSTEM (E MODE)
• 5.4.10. TROUBLESHOOTING OF HYDRAULIC, MECHANICAL SYSTEM (H MODE)
• 5.4.11. TROUBLESHOOTING OF ENGINE (S MODE)
• 6. DISASSEMBLY AND ASSEMBLY
• 6.1. METHOD OF USING MANUAL
• 6.2. PRECAUTIONS WHEN CARRYING OUT OPERATION
• 6.3. FUEL INJECTION PUMP
• 6.4. HYDROSHIFT TRANSMISSION
• 6.4.1. DISASSEMBLY
• 6.4.2. ASSEMBLY
• 6.5. MODULATING VALVE
• 6.5.1. ASSEMBLY
• 6.6. SELECTOR AND INCHING VALVE
• 6.6.1. ASSEMBLY
• 6.7. STEERING PPC VALVE
• 6.7.1. ASSEMBLY
• 6.8. STEERING CLUTCH
• 6.8.1. REMOVAL
• 6.8.2. INSTALLATION
• 6.8.3. DISASSEMBLY
• 6.8.4. ASSEMBLY
• 6.9. BEVEL GEAR SHAFT AND BEVEL GEAR
• 6.9.1. REMOVAL
• 6.9.2. INSTALLATION
• 6.10. FINAL DRIVE
• 6.10.1. REMOVAL AND INSTALLATION
• 6.11. FINAL DRIVE FIRST PINION
• 6.12. POWER TRAIN OIL COOLER
• 6.12.1. REMOVAL AND INSTALLATION
• 6.13. RECOIL SPRING
• 6.13.1. REMOVAL AND INSTALLATION
• 6.13.2. DISASSEMBLY AND ASSEMBLY
• 6.14. TRACK SHOE
• 6.14.1. REMOVAL AND INSTALLATION
• 6.15. HYDRAULIC CONTROL VALVE
• 6.15.1. ASSEMBLY
• 6.16. HYDRAULIC CYLINDER
• 6.16.1. ASSEMBLY
• 6.17. BLADE
• 6.17.1. REMOVAL AND INSTALLATION
• 7. MAINTENANCE STANDARD
• 7.1. DAMPER AND UNIVERSAL JOINT
• 7.2. HYDROSHIFT TRANSMISSION
• 7.3. TRANSMISSION CONTROL VALVE
• 7.4. TRANSMISSION AND STEERING PUMP
• 7.5. PPC VALVE
• 7.6. STEERING CYLINDER
• 7.7. BEVEL GEAR SHAFT
• 7.8. STEERING CLUTCH
• 7.9. TRACK SHOE (LUBRICATED TRACK LINK)
• 7.10. RUBBER CRAWLER
• 7.11. HYDRAULIC PUMP
• 7.12. HYDRAULIC CONTROL VALVE
• 7.13. HYDRAULIC CYLINDER
• 7.14. POWER ANGLE AND POWER TILTDOZER
• 8. OTHERS
• 8.1. POWER TRAIN HYDRAULIC CIRCUIT DIAGRAM (F2, R2 TRANSMISSION)
• 8.2. POWER TRAIN HYDRAULIC SYSTEM (F2, R2 TRANSMISSION)
• 8.3. POWER TRAIN HYDRAULIC CIRCUIT DIAGRAM (F3, R3 TRANSMISSION)
• 8.4. POWER TRAIN HYDRAULIC SYSTEM (F3, R3 TRANSMISSION)
• 8.5. HYDRAULIC CIRCUIT DIAGRAM
• 8.6. HYDRAULIC CIRCUIT SYSTEM
• 8.7. ELECTRICAL WIRING DIAGRAM
• 8.8. CAB AND AIR CONDITIONER ELECTRICAL CIRCUIT
• 8.9. TRIMMING DOZER
• 8.9.1. CONTENTS
• 8.9.2. OUTLINE
• 8.9.3. STRUCTURE AND FUNCTION
• 8.9.4. MAINTENANCE STANDARD