








$25.00
Generation
21Language
EnglishModel of Truck
D39EX-21, D39PX-21Region
JapanTruck Class
D39Illustrated factory Workshop Manual for Komatsu Crawler Dozers Models D39EX-21 and D39PX-21.
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):
D39EX-21 (SN: 01001-01500)
D39PX-21 (SN: 01001-01500)
Format: PDF, 464 pages
Language: English
Table of Contents:
GENERAL
SPECIFICATION DRAWING
SPECIFICATIONS
WEIGHT TABLE
TABLE OF FUEL, COOLANT AND LUBRICANTS
STRUCTURE AND FUNCTION, MAINTENANCE STANDARD
COOLING SYSTEM
ENGINE CONTROL
POWER TRAIN
POWER TRAIN SYSTEM
HST HYDRAULIC EQUIPMENT ARRANGEMENT DIAGRAM
STEERING, BRAKE CONTROL
DAMPER
SOLENOID VALVE
FINAL DRIVE
HST PUMP
SAFETY-SUCTION VALVE
CUT-OFF VALVE
CHARGE SAFETY VALVE
CHARGE PUMP
HST BRAKE QUICK RETURN CIRCUIT
TOWING VALVE
PARKING BRAKE VALVE
AS VALVE
HST MOTOR
STEERING, DIRECTIONAL PPC VALVE
INCHING VALVE
AUTOMATIC GEARSHIFTING VALVE
FRAME ASSEMBLY
TRACK FRAME, RECOIL SPRING
IDLER
TRACK ROLLER
CARRIER ROLLER
SPROCKET
TRACK SHOE
ARRANGEMENT OF HYDRAULIC EQUIPMENT FOR WORK EQUIPMENT
WORK EQUIPMENT CONTROL
HYDRAULIC TANK, FILTER
HYDRAULIC PUMP
WORK EQUIPMENT CYLINDER
SUCTION VALVE
CONTROL VALVE
CLSS
WORK EQUIPMENT PPC VALVE
WORK EQUIPMENT
CUTTING EDGE, END BIT
CAB RELATED
SAFETY MECHANISM WHEN STARTING ENGINE
GEARSHIFT CONTROL SYSTEM
PARKING BRAKE CONTROL SYSTEM
COMPONENT EQUIPMENT OF SYSTEM
MONITOR SYSTEM
SENSORS
TESTING AND ADJUSTING
STANDARD VALUE TABLE FOR ENGINE
STANDARD VALUE TABLE FOR CHASSIS
STANDARD VALUE TABLE FOR ELECTRICAL SYSTEM
TESTING AND ADJUSTING
TROUBLESHOOTING
DISASSEMBLY AND ASSEMBLY
HOW TO READ THIS MANUAL
COATING MATERIALS LIST
SPECIAL TOOL LIST
SKETCHES OF SPECIAL TOOLS
REMOVAL OF FUEL INJECTION PUMP ASSEMBLY
INSTALLATION OF FUEL INJECTION PUMP ASSEMBLY
REMOVAL OF CYLINDER HEAD ASSEMBLY
INSTALLATION OF CYLINDER HEAD ASSEMBLY
REMOVAL OF ENGINE FRONT SEAL
INSTALLATION OF ENGINE FRONT SEAL
REMOVAL OF ENGINE REAR SEAL
INSTALLATION OF ENGINE REAR SEAL
REMOVAL OF RADIATOR GUARD ASSEMBLY
INSTALLATION OF RADIATOR GUARD ASSEMBLY
DISASSEMBLY OF RADIATOR, OIL COOLER, AND CHARGE AIR COOLER ASSEMBLIES
ASSEMBLY OF RADIATOR, OIL COOLER, AND CHARGE AIR COOLER ASSEMBLIES
REMOVAL OF ENGINE ASSEMBLY
INSTALLATION OF ENGINE ASSEMBLY
REMOVAL OF DAMPER
INSTALLATION OF DAMPER
REMOVAL OF TRAVEL MOTOR AND FINAL DRIVE ASSEMBLY
INSTALLATION OF TRAVEL MOTOR AND FINAL DRIVE ASSEMBLY
DISASSEMBLY OF TRAVEL MOTOR AND FINAL DRIVE ASSEMBLY
ASSEMBLY OF TRAVEL MOTOR AND FINAL DRIVE ASSEMBLY
REMOVAL OF IDLER AND RECOIL SPRING ASSEMBLY
INSTALLATION OF IDLER AND RECOIL SPRING ASSEMBLY
DISASSEMBLY OF RECOIL SPRING ASSEMBLY
ASSEMBLY OF RECOIL SPRING ASSEMBLY
DISASSEMBLY OF IDLER ASSEMBLY
ASSEMBLY OF IDLER ASSEMBLY
DISASSEMBLY OF TRACK ROLLER ASSEMBLY
ASSEMBLY OF TRACK ROLLER ASSEMBLY
DISASSEMBLY OF CARRIER ROLLER ASSEMBLY
ASSEMBLY OF CARRIER ROLLER ASSEMBLY
SPREADING TRACK SHOE ASSEMBLY
INSTALLATION OF TRACK SHOE ASSEMBLY
REMOVAL OF HST PUMP ASSEMBLY
INSTALLATION OF HST PUMP ASSEMBLY
REMOVAL OF MAIN CONTROL VALVE ASSEMBLY
INSTALLATION OF MAIN CONTROL VALVE ASSEMBLY
DISASSEMBLY OF MAIN CONTROL VALVE ASSEMBLY
ASSEMBLY OF MAIN CONTROL VALVE ASSEMBLY
DISASSEMBLY OF HYDRAULIC CYLINDER ASSEMBLIES
ASSEMBLY OF HYDRAULIC CYLINDER ASSEMBLIES
REMOVAL OF BALDE ASSEMBLY
INSTALLATION OF BLADE ASSEMBLY
REMOVAL OF OPERATOR`S CAB FRAME ASSEMBLY
INSTALLATION OF OPERATO`S CAB FRAME ASSEMBLY
REMOVAL OF FUEL TANK ASSEMBLY
INSTALLATION OF FUEL TANK ASSEMBLY
REMOVAL OF HYDRAULIC TANK ASSEMBLY
INSTALLATION OF HYDRAULIC TANK ASSEMBLY
OTHERS
HYDRAULIC CIRCUIT DIAGRAM (1/2)(D39EX-21 SERIAL NO.1001-1200 D39PX-21 SERIAL NO.1001-1208)
HYDRAULIC CIRCUIT DIAGRAM (1/2) (D39EX-21 SERIAL NO.1201 AND UP D39PX-21 SERIAL NO.1209 AND UP)
HYDRAULIC CIRCUIT DIAGRAM (2/2)
ELECTRICAL CIRCUIT DIAGRAM (1/2)
ELECTRICAL CIRCUIT DIAGRAM (2/2)
ELECTRICAL CIRCUIT DIAGRAM FOR AIR CONDITIONER
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):
D39EX-21 (SN: 01001-01500)
D39PX-21 (SN: 01001-01500)
Format: PDF, 464 pages
Language: English
Table of Contents:
GENERAL
SPECIFICATION DRAWING
SPECIFICATIONS
WEIGHT TABLE
TABLE OF FUEL, COOLANT AND LUBRICANTS
STRUCTURE AND FUNCTION, MAINTENANCE STANDARD
COOLING SYSTEM
ENGINE CONTROL
POWER TRAIN
POWER TRAIN SYSTEM
HST HYDRAULIC EQUIPMENT ARRANGEMENT DIAGRAM
STEERING, BRAKE CONTROL
DAMPER
SOLENOID VALVE
FINAL DRIVE
HST PUMP
SAFETY-SUCTION VALVE
CUT-OFF VALVE
CHARGE SAFETY VALVE
CHARGE PUMP
HST BRAKE QUICK RETURN CIRCUIT
TOWING VALVE
PARKING BRAKE VALVE
AS VALVE
HST MOTOR
STEERING, DIRECTIONAL PPC VALVE
INCHING VALVE
AUTOMATIC GEARSHIFTING VALVE
FRAME ASSEMBLY
TRACK FRAME, RECOIL SPRING
IDLER
TRACK ROLLER
CARRIER ROLLER
SPROCKET
TRACK SHOE
ARRANGEMENT OF HYDRAULIC EQUIPMENT FOR WORK EQUIPMENT
WORK EQUIPMENT CONTROL
HYDRAULIC TANK, FILTER
HYDRAULIC PUMP
WORK EQUIPMENT CYLINDER
SUCTION VALVE
CONTROL VALVE
CLSS
WORK EQUIPMENT PPC VALVE
WORK EQUIPMENT
CUTTING EDGE, END BIT
CAB RELATED
SAFETY MECHANISM WHEN STARTING ENGINE
GEARSHIFT CONTROL SYSTEM
PARKING BRAKE CONTROL SYSTEM
COMPONENT EQUIPMENT OF SYSTEM
MONITOR SYSTEM
SENSORS
TESTING AND ADJUSTING
STANDARD VALUE TABLE FOR ENGINE
STANDARD VALUE TABLE FOR CHASSIS
STANDARD VALUE TABLE FOR ELECTRICAL SYSTEM
TESTING AND ADJUSTING
TROUBLESHOOTING
DISASSEMBLY AND ASSEMBLY
HOW TO READ THIS MANUAL
COATING MATERIALS LIST
SPECIAL TOOL LIST
SKETCHES OF SPECIAL TOOLS
REMOVAL OF FUEL INJECTION PUMP ASSEMBLY
INSTALLATION OF FUEL INJECTION PUMP ASSEMBLY
REMOVAL OF CYLINDER HEAD ASSEMBLY
INSTALLATION OF CYLINDER HEAD ASSEMBLY
REMOVAL OF ENGINE FRONT SEAL
INSTALLATION OF ENGINE FRONT SEAL
REMOVAL OF ENGINE REAR SEAL
INSTALLATION OF ENGINE REAR SEAL
REMOVAL OF RADIATOR GUARD ASSEMBLY
INSTALLATION OF RADIATOR GUARD ASSEMBLY
DISASSEMBLY OF RADIATOR, OIL COOLER, AND CHARGE AIR COOLER ASSEMBLIES
ASSEMBLY OF RADIATOR, OIL COOLER, AND CHARGE AIR COOLER ASSEMBLIES
REMOVAL OF ENGINE ASSEMBLY
INSTALLATION OF ENGINE ASSEMBLY
REMOVAL OF DAMPER
INSTALLATION OF DAMPER
REMOVAL OF TRAVEL MOTOR AND FINAL DRIVE ASSEMBLY
INSTALLATION OF TRAVEL MOTOR AND FINAL DRIVE ASSEMBLY
DISASSEMBLY OF TRAVEL MOTOR AND FINAL DRIVE ASSEMBLY
ASSEMBLY OF TRAVEL MOTOR AND FINAL DRIVE ASSEMBLY
REMOVAL OF IDLER AND RECOIL SPRING ASSEMBLY
INSTALLATION OF IDLER AND RECOIL SPRING ASSEMBLY
DISASSEMBLY OF RECOIL SPRING ASSEMBLY
ASSEMBLY OF RECOIL SPRING ASSEMBLY
DISASSEMBLY OF IDLER ASSEMBLY
ASSEMBLY OF IDLER ASSEMBLY
DISASSEMBLY OF TRACK ROLLER ASSEMBLY
ASSEMBLY OF TRACK ROLLER ASSEMBLY
DISASSEMBLY OF CARRIER ROLLER ASSEMBLY
ASSEMBLY OF CARRIER ROLLER ASSEMBLY
SPREADING TRACK SHOE ASSEMBLY
INSTALLATION OF TRACK SHOE ASSEMBLY
REMOVAL OF HST PUMP ASSEMBLY
INSTALLATION OF HST PUMP ASSEMBLY
REMOVAL OF MAIN CONTROL VALVE ASSEMBLY
INSTALLATION OF MAIN CONTROL VALVE ASSEMBLY
DISASSEMBLY OF MAIN CONTROL VALVE ASSEMBLY
ASSEMBLY OF MAIN CONTROL VALVE ASSEMBLY
DISASSEMBLY OF HYDRAULIC CYLINDER ASSEMBLIES
ASSEMBLY OF HYDRAULIC CYLINDER ASSEMBLIES
REMOVAL OF BALDE ASSEMBLY
INSTALLATION OF BLADE ASSEMBLY
REMOVAL OF OPERATOR`S CAB FRAME ASSEMBLY
INSTALLATION OF OPERATO`S CAB FRAME ASSEMBLY
REMOVAL OF FUEL TANK ASSEMBLY
INSTALLATION OF FUEL TANK ASSEMBLY
REMOVAL OF HYDRAULIC TANK ASSEMBLY
INSTALLATION OF HYDRAULIC TANK ASSEMBLY
OTHERS
HYDRAULIC CIRCUIT DIAGRAM (1/2)(D39EX-21 SERIAL NO.1001-1200 D39PX-21 SERIAL NO.1001-1208)
HYDRAULIC CIRCUIT DIAGRAM (1/2) (D39EX-21 SERIAL NO.1201 AND UP D39PX-21 SERIAL NO.1209 AND UP)
HYDRAULIC CIRCUIT DIAGRAM (2/2)
ELECTRICAL CIRCUIT DIAGRAM (1/2)
ELECTRICAL CIRCUIT DIAGRAM (2/2)
ELECTRICAL CIRCUIT DIAGRAM FOR AIR CONDITIONER
General
Generation
21Language
EnglishModel of Truck
D39EX-21, D39PX-21Region
JapanTruck Class
D39Type of Document
Workshop ManualType of Truck
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