Komatsu D20PL-7, D20PLL-7, D20AG-7, D20P-7A, D20PG-7A, D21A-7, D21S-7, D21AG-7, D21QG-7, D21PG-7A Bull Dozer Shop Manual SEBM001408

Description

• Model List:
  • D20PL-7 Bull Dozer
  • D20PLL-7 Bull Dozer
  • D20AG-7 Bull Dozer
  • D20P-7A Bull Dozer
  • D20PG-7A Bull Dozer
  • D21A-7 Bull Dozer
  • D21S-7 Bull Dozer
  • D21AG-7 Bull Dozer
  • D21QG-7 Bull Dozer
  • D21PG-7A Bull Dozer

• 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. POWER TRAIN HYDRAULIC CIRCUIT DIAGRAM
• 4.6. POWER TRAIN HYDRAULIC SYSTEM
• 4.7. MAIN CLUTCH CONTROL
• 4.8. MAIN CLUTCH
• 4.9. TRANSMISSION
• 4.10. DAMPER AND UNIVERSAL JOINT
• 4.11. TRANSMISSION CONTROL
• 4.12. TRANSMISSION PUMP
• 4.13. HYDROSHIFT TRANSMISSION
• 4.14. TRANSMISSION CONTROL VALVE
• 4.15. STEERING CLUTCH AND BRAKE CONTROL
• 4.16. STEERING MAIN RELIEF VALVE
• 4.17. STEERING CYLINDER
• 4.18. BRAKE CYLINDER
• 4.19. PPC VALVE
• 4.20. BEVEL GEAR SHAFT AND STEERING CLUTCH
• 4.21. STEERING BRAKE
• 4.22. FINAL DRIVE
• 4.23. TRACK FRAME
• 4.24. MAIN FRAME AND SUSPENSION
• 4.25. HYDRAULIC PIPING
• 4.26. HYDRAULIC CIRCUIT DIAGRAM
• 4.27. HYDRAULIC CIRCUIT SYSTEM
• 4.28. HYDRAULIC CONTROL
• 4.29. HYDRAULIC TANK AND FILTER
• 4.30. ANGLE SELECTOR VALVE
• 4.31. HYDRAULIC CONTROL VALVE
• 4.32. OPERATION OF WORK EQUIPMENT CONTROL CIRCUIT
• 4.33. STRAIGHT TILTDOZER
• 4.34. POWER ANGLE AND TILTDOZER
• 4.35. BUCKET AND LINK
• 4.36. ELECTRICAL WIRING DIAGRAM
• 4.37. ENGINE CONTROL
• 4.38. MONITOR SYSTEM
• 4.39. SENSORS
• 5. TESTING AND ADJUSTING
• 5.1. STANDARD VALUE TABLE FOR ENGINE
• 5.2. STANDARD VALUE TABLE FOR CHASSIS
• 5.3. STANDARD VALUE TABLE FOR ELECTRICAL SYSTEM
• 5.4. TABLE OF TOOLS FOR TESTING, ADJUSTING AND TROUBLESHOOTING
• 5.5. MEASURING ENGINE SPEED
• 5.6. MEASURING EXHAUST COLOR
• 5.7. ADJUSTING VALVE CLEARANCE
• 5.8. MEASURING COMPRESSION PRESSURE
• 5.9. MEASURING BLOWBY
• 5.10. TESTING AND ADJUSTING FUEL INJECTION TIMING
• 5.11. BLEEDING AIR FROM FUEL CIRCUIT
• 5.12. MEASURING ENGINE OIL PRESSURE
• 5.13. TESTING AND ADJUSTING FAN BELT TENSION
• 5.14. ADJUSTING FUEL CONTROL LINKAGE
• 5.15. ADJUSTING DECELEREATOR PEDAL LINKAGE
• 5.16. MEASURING POWER TRAIN OIL PRESSURE
• 5.17. ADJUSTING PPC VALVE
• 5.18. BLEEDING AIR FROM STEERING CIRCUIT
• 5.19. MEASURING AND ADJUSTING WORK EQUIPMENT MAIN RELIEF PRESSURE
• 5.20. BLEEDING AIR FROM HYDRAULIC CYLINDERS
• 5.21. BLEEDING AIR FROM ANGLE CYLINDER CIRCUIT
• 5.22. ADJUSTING FUEL CONTROL LEVER
• 5.23. PROCEDURE FOR ADJUSTING ENGINE STOP MOTOR CABLE
• 5.24. ADJUSTING MAIN CLUTCH CONTROL LINKAGE
• 5.25. ADJUSTING TRANSMISSION CONTROL LINKAGE
• 5.26. ADJUSTING TRAVEL OF INCHING PEDAL
• 5.27. ADJUSTING BRAKE PEDAL, BRAKE CYLINDER
• 5.28. ADJUSTING BRAKE LINING CLEARANCE
• 5.29. TROUBLESHOOTING
• 5.29.1. POINTS TO REMEMBER WHEN TROUBLESHOOTING
• 5.29.2. SEQUENCE OF EVENTS IN TROUBLESHOOTING
• 5.29.3. PRECAUTIONS WHEN CARRYING OUT MAINTENANCE
• 5.29.4. HANDLING CONNECTORS
• 5.29.5. CHECKS BEFORE TROUBLESHOOTING
• 5.29.6. METHOD OF USING MATRIX TROUBLESHOOTING CHART
• 5.29.7. TROUBLESHOOTING OF ENGINE (S MODE)
• 5.29.8. TROUBLESHOOTING OF HYDRAULIC, MECHANICAL SYSTEM (H MODE)
• 6. DISASSEMBLY AND ASSEMBLY
• 6.1. METHOD OF USING MANUAL
• 6.2. PRECAUTIONS WHEN HANDLING PIPING DURING DISASSEMBLY
• 6.3. PRECAUTIONS WHEN CARRYING OUT OPERATION
• 6.4. STARTING MOTOR
• 6.4.1. REMOVAL AND INSTALLATION
• 6.5. ALTERNATOR
• 6.5.1. REMOVAL AND INSTALLATION
• 6.6. FUEL INJECTION PUMP
• 6.6.1. REMOVAL
• 6.6.2. INSTALLATION
• 6.7. WATER PUMP
• 6.7.1. REMOVAL AND INSTALLATION
• 6.8. THERMOSTAT
• 6.8.1. REMOVAL AND INSTALLATION
• 6.9. NOZZLE HOLDER
• 6.9.1. REMOVAL AND INSTALLATION
• 6.10. MAIN CLUTCH (D207)
• 6.10.1. REMOVAL
• 6.10.2. INSTALLATION
• 6.10.3. DISASSEMBLY
• 6.10.4. ASSEMBLY
• 6.11. TRANSMISSION (D207)
• 6.11.1. REMOVAL
• 6.11.2. INSTALLATION
• 6.11.3. DISASSEMBLY
• 6.11.4. ASSEMBLY
• 6.12. HYDROSHIFT TRANSMISSION (D217)
• 6.12.1. REMOVAL AND INSTALLATION
• 6.13. MODULATING VALVE AND PUMP (D217)
• 6.13.1. REMOVAL AND INSTALLATION
• 6.14. MODULATING VALVE (D217)
• 6.14.1. DISASSEMBLY
• 6.14.2. ASSEMBLY
• 6.15. SELECTOR AND INCHING VALVE (D217)
• 6.15.1. REMOVAL AND INSTALLATION
• 6.15.2. DISASSEMBLY
• 6.15.3. ASSEMBLY
• 6.16. MAIN RELIEF VALVE
• 6.16.1. REMOVAL AND INSTALLATION
• 6.17. STEERING PPC VALVE
• 6.17.1. REMOVAL AND INSTALLATION
• 6.17.2. DISASSEMBLY
• 6.17.3. ASSEMBLY
• 6.18. STEERING CLUTCH
• 6.18.1. REMOVAL
• 6.18.2. INSTALLATION
• 6.18.3. DISASSEMBLY
• 6.18.4. ASSEMBLY
• 6.19. BEVEL GEAR SHAFT AND BEVEL GEAR
• 6.19.1. REMOVAL
• 6.19.2. INSTALLATION
• 6.20. FINAL DRIVE
• 6.20.1. REMOVAL AND INSTALLATION
• 6.21. FINAL DRIVE FIRST PINION
• 6.22. POWER TRAIN OIL COOLER
• 6.22.1. REMOVAL AND INSTALLATION
• 6.23. TRACK FRAME
• 6.23.1. REMOVAL AND INSTALLATION
• 6.24. RECOIL SPRING
• 6.24.1. REMOVAL AND INSTALLATION
• 6.24.2. DISASSEMBLY AND ASSEMBLY
• 6.25. IDLER
• 6.25.1. REMOVAL AND INSTALLATION
• 6.26. CARRIER ROLLER
• 6.26.1. REMOVAL AND INSTALLATION
• 6.26.2. REMOVAL AND INSTALLATION
• 6.26.3. DISASSEMBLY
• 6.26.4. ASSEMBLY
• 6.27. TRACK SHOE
• 6.27.1. REMOVAL AND INSTALLATION
• 6.28. HYDRAULIC PUMP
• 6.28.1. REMOVAL AND INSTALLATION
• 6.29. HYDRAULIC CONTROL VALVE
• 6.29.1. REMOVAL AND INSTALLATION
• 6.29.2. DISSASSEMBLY
• 6.29.3. ASSEMBLY
• 6.30. BLADE LIFT CYLINDER
• 6.30.1. REMOVAL AND INSTALLATION
• 6.31. BLADE TILT CYLINDER
• 6.31.1. REMOVAL AND INSTALLATION
• 6.32. BLADE ANGLE CYLINDER
• 6.32.1. REMOVAL AND INSTALLATION
• 6.33. BUCKET LIFT CYLINDER (D21S, QG7)
• 6.33.1. REMOVAL AND INSTALLATION
• 6.34. BUCKET DUMP CYLINDER (D21S, QG7)
• 6.34.1. REMOVAL AND INSTALLATION
• 6.35. HYDRAULIC CYLINDER
• 6.35.1. DISASSEMBLY
• 6.35.2. ASSEMBLY
• 6.36. WORK EQUIPMENT
• 6.36.1. REMOVAL AND INSTALLATION
• 6.37. BLADE
• 6.37.1. REMOVAL AND INSTALLATION
• 6.38. WORK EQUIPMENT (D21S, QG7)
• 6.38.1. REMOVAL AND INSTALLATION
• 6.39. BUCKET (D21S, QG7)
• 6.39.1. REMOVAL AND INSTALLATION
• 6.40. OPERATORS SEAT FRAME
• 6.40.1. REMOVAL
• 6.40.2. INSTALLATION
• 7. MAINTENANCE STANDARD
• 7.1. MAIN CLUTCH
• 7.2. TRANSMISSION
• 7.3. DAMPER AND UNIVERSAL JOINT
• 7.4. HYDROSHIFT TRANSMISSION
• 7.5. TRANSMISSION CONTROL VALVE
• 7.6. MAIN CLUTCH AND STEERING PUMP
• 7.7. STEERING MAIN RELIEF VALVE
• 7.8. TRANSMISSION AND STEERING PUMP
• 7.9. PPC VALVE
• 7.10. STEERING CYLINDER
• 7.11. BEVEL GEAR SHAFT
• 7.12. STEERING CLUTCH
• 7.13. TRACK SHOE (LUBRICATED TRACK LINK) D20PL, PLL7, D21A7, D20P7A
• 7.14. TRACK SHOE (DRY TYPE TRACK LINK) D20PL, PLL7, D21A7, D20P7A
• 7.15. TRACK SHOE (LUBRICATED TRACK LINK) D21S7
• 7.16. TRACK SHOE (DRY TYPE TRACK LINK) D21S7
• 7.17. RUBBER CRAWLER
• 7.18. HYDRAULIC PUMP
• 7.19. HYDRAULIC CONTROL VALVE
• 7.20. HYDRAULIC CYLINDER
• 7.21. STRAIGHT TILTDOZER
• 7.22. POWER ANGLE AND TILTDOZER
• 7.23. BUCKET AND LINK
• 8. OTHERS
• 8.1. TRIMMING DOZER
• 8.1.1. CONTENTS
• 8.1.2. GENERAL
• 8.1.3. STRUCTURE AND FUNCTION
• 8.1.4. MAINTENANCE STANDARD