








$25.00
Generation
7Language
EnglishModel of Truck
D20AG-7, D20P-7, D20PG-7-A, D20PL-7, D20PLL-7, D21A-7, D21AG-7, D21P-7, D21PG-7-A, D21QG-7, D21S-7Region
JapanTruck Class
D20, D21Illustrated factory Workshop Manual for Komatsu Crawler Dozers Models D20AG-7, D20P-7, D20PG-7-A, D20PL-7, D20PLL-7, D21A-7, D21AG-7, D21P-7, D21PG-7-A, D21QG-7 and D21S-7.
This manual will assist you in diagnosing, repairing, and adjusting for your crawler dozer.
You can use a Windows, Mac, or Android device to view this manual. You only need to have a PDF reader installed.
Covered Models (Japan):
D20AG-7 (SN: 75001-)
D20P-7 (SN: 75001-)
D20PG-7-A (SN: 75001-)
D20PL-7 (SN: 62001-)
D20PLL-7 (SN: 62001-)
D21A-7 (SN: 75001-; 80060-)
D21AG-7 (SN: 75001-)
D21P-7 (SN: 75001-; 80060-; 80228-)
D21PG-7-A (SN: 75001-)
D21QG-7 (SN: 61001-)
D21S-7 (SN: 61001-)
Format: PDF, 716 pages
Language: English
Table of Contents:
GENERAL
SPECIFICATION DRAWINGS
SPECIFICATIONS
WEIGHT TABLE
FUEL, COOLANT AND LUBRICANTS
STRUCTURE AND FUNCTION
ENGINE CONTROL
POWER TRAIN SYSTEM
POWER TRAIN SKELETON
POWER TRAIN HYDRAULIC PIPING
POWER TRAIN HYDRAULIC CIRCUIT DIAGRAM
POWER TRAIN HYDRAULIC SYSTEM
MAIN CLUTCH CONTROL
MAIN CLUTCH
TRANSMISSION
DAMPER AND UNIVERSAL JOINT
TRANSMISSION CONTROL
TRANSMISSION PUMP
HYDROSHIFT TRANSMISSION
TRANSMISSION CONTROL VALVE
STEERING CLUTCH AND BRAKE CONTROL
STEERING MAIN RELIEF VALVE
STEERING CYLINDER
BRAKE CYLINDER
PPC VALVE
BEVEL GEAR SHAFT AND STEERING CLUTCH
STEERING BRAKE
FINAL DRIVE
TRACK FRAME
MAIN FRAME AND SUSPENSION
HYDRAULIC PIPING
HYDRAULIC CIRCUIT DIAGRAM
HYDRAULIC CIRCUIT SYSTEM
HYDRAULIC CONTROL
HYDRAULIC TANK AND FILTER
ANGLE SELECTOR VALVE
HYDRAULIC CONTROL VALVE
OPERATION OF WORK EQUIPMENT CONTROL CIRCUIT
STRAIGHT TILTDOZER
POWER ANGLE AND TILTDOZER
BUCKET AND LINK
ELECTRICAL WIRING DIAGRAM
ENGINE CONTROL
MONITOR SYSTEM
SENSORS
TESTING AND ADJUSTING
STANDARD VALUE TABLE FOR ENGINE
STANDARD VALUE TABLE FOR CHASSIS
STANDARD VALUE TABLE FOR ELECTRICAL SYSTEM
TABLE OF TOOLS FOR TESTING, ADJUSTING AND TROUBLESHOOTING
MEASURING ENGINE SPEED
MEASURING EXHAUST COLOR
ADJUSTING VALVE CLEARANCE
MEASURING COMPRESSION PRESSURE
MEASURING BLOW-BY
TESTING AND ADJUSTING FUEL INJECTION TIMING
BLEEDING AIR FROM FUEL CIRCUIT
MEASURING ENGINE OIL PRESSURE
TESTING AND ADJUSTING FAN BELT TENSION
ADJUSTING FUEL CONTROL LINKAGE
ADJUSTING DECELEREATOR PEDAL LINKAGE
MEASURING POWER TRAIN OIL PRESSURE
ADJUSTING PPC VALVE
BLEEDING AIR FROM STEERING CIRCUIT
MEASURING AND ADJUSTING WORK EQUIPMENT MAIN RELIEF PRESSURE
BLEEDING AIR FROM HYDRAULIC CYLINDERS
BLEEDING AIR FROM ANGLE CYLINDER CIRCUIT
ADJUSTING FUEL CONTROL LEVER
PROCEDURE FOR ADJUSTING ENGINE STOP MOTOR CABLE
ADJUSTING MAIN CLUTCH CONTROL LINKAGE
ADJUSTING TRANSMISSION CONTROL LINKAGE
ADJUSTING TRAVEL OF INCHING PEDAL
ADJUSTING BRAKE PEDAL, BRAKE CYLINDER
ADJUSTING BRAKE LINING CLEARANCE
TROUBLESHOOTING
DISASSEMBLY AND ASSEMBLY
METHOD OF USING MANUAL
PRECAUTIONS WHEN HANDLING PIPING DURING DISASSEMBLY
PRECAUTIONS WHEN CARRYING OUT OPERATION
STARTING MOTOR
ALTERNATOR
FUEL INJECTION PUMP
WATER PUMP
THERMOSTAT
NOZZLE HOLDER
CYLINDER HEAD
RADIATOR GUARD
RADIATOR
ENGINE
DAMPER (D21-7)
MAIN CLUTCH (D20-7)
TRANSMISSION (D20-7)
HYDROSHIFT TRANSMISSION (D21-7)
STEERING PUMP
MODULATING VALVE AND PUMP (D21-7)
MODULATING VALVE (D21-7)
SELECTOR AND INCHING VALVE (D21-7)
MAIN RELIEF VALVE
STEERING PPC VALVE
STEERING CLUTCH
BEVEL GEAR SHAFT AND BEVEL GEAR
FINAL DRIVE
FINAL DRIVE FIRST PINION
FINAL DRIVE
POWER TRAIN OIL COOLER
TRACK FRAME
RECOIL SPRING
IDLER
CARRIER ROLLER
IDLER
CARRIER ROLLER
TRACK ROLLER
TRACK SHOE
HYDRAULIC PUMP
HYDRAULIC CONTROL VALVE
BLADE LIFT CYLINDER
BLADE TILT CYLINDER
BLADE ANGLE CYLINDER
BUCKET LIFT CYLINDER (D21S, QG-7)
BUCKET DUMP CYLINDER (D21S, QG-7)
HYDRAULIC CYLINDER
WORK EQUIPMENT
BLADE
WORK EQUIPMENT (D21S, QG-7)
BUCKET (D21S, QG-7)
OPERATOR`S SEAT FRAME
MAINTENANCE STANDARD
MAIN CLUTCH
TRANSMISSION
DAMPER AND UNIVERSAL JOINT
HYDROSHIFT TRANSMISSION
TRANSMISSION CONTROL VALVE
MAIN CLUTCH AND STEERING PUMP
STEERING MAIN RELIEF VALVE
TRANSMISSION AND STEERING PUMP
PPC VALVE
STEERING CYLINDER
BEVEL GEAR SHAFT
STEERING CLUTCH
STEERING BRAKE
FINAL DRIVE
TRACK FRAME
IDLER CUSHION
IDLER
TRACK ROLLER
CARRIER ROLLER
TRACK SHOE (LUBRICATED TRACK LINK) D20PL, PLL-7, D21A-7, D20P-7A
TRACK SHOE (DRY TYPE TRACK LINK) D20PL, PLL-7, D21A-7, D20P-7A
TRACK SHOE (LUBRICATED TRACK LINK) D21S-7
TRACK SHOE (DRY TYPE TRACK LINK) D21S-7
RUBBER CRAWLER
HYDRAULIC PUMP
HYDRAULIC CONTROL VALVE
HYDRAULIC CYLINDER
STRAIGHT TILTDOZER
POWER ANGLE AND TILTDOZER
BUCKET AND LINK
OTHERS
TRIMMING DOZER
This manual will assist you in diagnosing, repairing, and adjusting for your crawler dozer.
You can use a Windows, Mac, or Android device to view this manual. You only need to have a PDF reader installed.
Covered Models (Japan):
D20AG-7 (SN: 75001-)
D20P-7 (SN: 75001-)
D20PG-7-A (SN: 75001-)
D20PL-7 (SN: 62001-)
D20PLL-7 (SN: 62001-)
D21A-7 (SN: 75001-; 80060-)
D21AG-7 (SN: 75001-)
D21P-7 (SN: 75001-; 80060-; 80228-)
D21PG-7-A (SN: 75001-)
D21QG-7 (SN: 61001-)
D21S-7 (SN: 61001-)
Format: PDF, 716 pages
Language: English
Table of Contents:
GENERAL
SPECIFICATION DRAWINGS
SPECIFICATIONS
WEIGHT TABLE
FUEL, COOLANT AND LUBRICANTS
STRUCTURE AND FUNCTION
ENGINE CONTROL
POWER TRAIN SYSTEM
POWER TRAIN SKELETON
POWER TRAIN HYDRAULIC PIPING
POWER TRAIN HYDRAULIC CIRCUIT DIAGRAM
POWER TRAIN HYDRAULIC SYSTEM
MAIN CLUTCH CONTROL
MAIN CLUTCH
TRANSMISSION
DAMPER AND UNIVERSAL JOINT
TRANSMISSION CONTROL
TRANSMISSION PUMP
HYDROSHIFT TRANSMISSION
TRANSMISSION CONTROL VALVE
STEERING CLUTCH AND BRAKE CONTROL
STEERING MAIN RELIEF VALVE
STEERING CYLINDER
BRAKE CYLINDER
PPC VALVE
BEVEL GEAR SHAFT AND STEERING CLUTCH
STEERING BRAKE
FINAL DRIVE
TRACK FRAME
MAIN FRAME AND SUSPENSION
HYDRAULIC PIPING
HYDRAULIC CIRCUIT DIAGRAM
HYDRAULIC CIRCUIT SYSTEM
HYDRAULIC CONTROL
HYDRAULIC TANK AND FILTER
ANGLE SELECTOR VALVE
HYDRAULIC CONTROL VALVE
OPERATION OF WORK EQUIPMENT CONTROL CIRCUIT
STRAIGHT TILTDOZER
POWER ANGLE AND TILTDOZER
BUCKET AND LINK
ELECTRICAL WIRING DIAGRAM
ENGINE CONTROL
MONITOR SYSTEM
SENSORS
TESTING AND ADJUSTING
STANDARD VALUE TABLE FOR ENGINE
STANDARD VALUE TABLE FOR CHASSIS
STANDARD VALUE TABLE FOR ELECTRICAL SYSTEM
TABLE OF TOOLS FOR TESTING, ADJUSTING AND TROUBLESHOOTING
MEASURING ENGINE SPEED
MEASURING EXHAUST COLOR
ADJUSTING VALVE CLEARANCE
MEASURING COMPRESSION PRESSURE
MEASURING BLOW-BY
TESTING AND ADJUSTING FUEL INJECTION TIMING
BLEEDING AIR FROM FUEL CIRCUIT
MEASURING ENGINE OIL PRESSURE
TESTING AND ADJUSTING FAN BELT TENSION
ADJUSTING FUEL CONTROL LINKAGE
ADJUSTING DECELEREATOR PEDAL LINKAGE
MEASURING POWER TRAIN OIL PRESSURE
ADJUSTING PPC VALVE
BLEEDING AIR FROM STEERING CIRCUIT
MEASURING AND ADJUSTING WORK EQUIPMENT MAIN RELIEF PRESSURE
BLEEDING AIR FROM HYDRAULIC CYLINDERS
BLEEDING AIR FROM ANGLE CYLINDER CIRCUIT
ADJUSTING FUEL CONTROL LEVER
PROCEDURE FOR ADJUSTING ENGINE STOP MOTOR CABLE
ADJUSTING MAIN CLUTCH CONTROL LINKAGE
ADJUSTING TRANSMISSION CONTROL LINKAGE
ADJUSTING TRAVEL OF INCHING PEDAL
ADJUSTING BRAKE PEDAL, BRAKE CYLINDER
ADJUSTING BRAKE LINING CLEARANCE
TROUBLESHOOTING
DISASSEMBLY AND ASSEMBLY
METHOD OF USING MANUAL
PRECAUTIONS WHEN HANDLING PIPING DURING DISASSEMBLY
PRECAUTIONS WHEN CARRYING OUT OPERATION
STARTING MOTOR
ALTERNATOR
FUEL INJECTION PUMP
WATER PUMP
THERMOSTAT
NOZZLE HOLDER
CYLINDER HEAD
RADIATOR GUARD
RADIATOR
ENGINE
DAMPER (D21-7)
MAIN CLUTCH (D20-7)
TRANSMISSION (D20-7)
HYDROSHIFT TRANSMISSION (D21-7)
STEERING PUMP
MODULATING VALVE AND PUMP (D21-7)
MODULATING VALVE (D21-7)
SELECTOR AND INCHING VALVE (D21-7)
MAIN RELIEF VALVE
STEERING PPC VALVE
STEERING CLUTCH
BEVEL GEAR SHAFT AND BEVEL GEAR
FINAL DRIVE
FINAL DRIVE FIRST PINION
FINAL DRIVE
POWER TRAIN OIL COOLER
TRACK FRAME
RECOIL SPRING
IDLER
CARRIER ROLLER
IDLER
CARRIER ROLLER
TRACK ROLLER
TRACK SHOE
HYDRAULIC PUMP
HYDRAULIC CONTROL VALVE
BLADE LIFT CYLINDER
BLADE TILT CYLINDER
BLADE ANGLE CYLINDER
BUCKET LIFT CYLINDER (D21S, QG-7)
BUCKET DUMP CYLINDER (D21S, QG-7)
HYDRAULIC CYLINDER
WORK EQUIPMENT
BLADE
WORK EQUIPMENT (D21S, QG-7)
BUCKET (D21S, QG-7)
OPERATOR`S SEAT FRAME
MAINTENANCE STANDARD
MAIN CLUTCH
TRANSMISSION
DAMPER AND UNIVERSAL JOINT
HYDROSHIFT TRANSMISSION
TRANSMISSION CONTROL VALVE
MAIN CLUTCH AND STEERING PUMP
STEERING MAIN RELIEF VALVE
TRANSMISSION AND STEERING PUMP
PPC VALVE
STEERING CYLINDER
BEVEL GEAR SHAFT
STEERING CLUTCH
STEERING BRAKE
FINAL DRIVE
TRACK FRAME
IDLER CUSHION
IDLER
TRACK ROLLER
CARRIER ROLLER
TRACK SHOE (LUBRICATED TRACK LINK) D20PL, PLL-7, D21A-7, D20P-7A
TRACK SHOE (DRY TYPE TRACK LINK) D20PL, PLL-7, D21A-7, D20P-7A
TRACK SHOE (LUBRICATED TRACK LINK) D21S-7
TRACK SHOE (DRY TYPE TRACK LINK) D21S-7
RUBBER CRAWLER
HYDRAULIC PUMP
HYDRAULIC CONTROL VALVE
HYDRAULIC CYLINDER
STRAIGHT TILTDOZER
POWER ANGLE AND TILTDOZER
BUCKET AND LINK
OTHERS
TRIMMING DOZER
General
Generation
7Language
EnglishModel of Truck
D20AG-7, D20P-7, D20PG-7-A, D20PL-7, D20PLL-7, D21A-7, D21AG-7, D21P-7, D21PG-7-A, D21QG-7, D21S-7Region
JapanTruck Class
D20, D21Type of Document
Workshop ManualType of Truck
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