








$25.00
Generation
21Language
EnglishModel of Truck
D31EX-21, D31PX-21, D37EX-21, D37PX-21, D39EX-21, D39PX-21Region
JapanTruck Class
D31, D37, D39Illustrated factory Workshop Manual for Komatsu Crawler Dozers Models D31EX-21, D31PX-21, D37EX-21, D37PX-21, 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):
D31EX-21 (SN: 50501-)
D31PX-21 (SN: 50501-)
D37EX-21 (SN: 05501-)
D37PX-21 (SN: 05501-)
D39EX-21 (SN: 01501-)
D39PX-21 (SN: 01501-)
Format: PDF, 745 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
DAMPER
HST HYDRAULIC EQUIPMENT ARRANGEMENT DIAGRAM
STEERING, BRAKE CONTROL
SOLENOID VALVE
TOWING VALVE
FINAL DRIVE
HST PUMP
SAFETY-SUCTION VALVE
CHARGE SAFETY VALVE
CHARGE PUMP
TOWING VALVE
HST MOTOR
ELECTRIC LEVER (FOR STEERING)
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
PPC LOCK VALVE
ACCUMULATOR
HYDRAULIC PUMP
WORK EQUIPMENT CYLINDER
CONTROL VALVE
CLSS
PPC VALVE
WORK EQUIPMENT
CUTTING EDGE, END BIT
RIPPER
CAB RELATED
ENGINE CONTROL
HST CONTROL SYSTEM
GEAR SHIFT CONTROL SYSTEM
PARING BRAKE CONTROL SYSTEM
COMPONENT EQUIPMENT OF SYSTEM
MONITOR SYSTEM
MONITOR PANEL
SENSORS
TESTING AND ADJUSTING
STANDARD VALUE TABLE FOR ENGINE
STANDARD VALUE TABLE FOR CHASSIS
TESTING AND ADJUSTING
TROUBLESHOOTING
DISASSEMBLY AND ASSEMBLY
HOW TO READ THIS MANUAL
COATING MATERIALS LIST
SPECIAL TOOL LIST
SKETCHES OF SPECIAL TOOLS
REMOVAL AND INSTALLATION OF FUEL INJECTION PUMP ASSEMBLY
REMOVAL AND INSTALLATION OF CYLINDER HEAD ASSEMBLY
REMOVAL AND INSTALLATION OF ENGINE FRONT SEAL
REMOVAL AND INSTALLATION OF ENGINE REAR SEAL
REMOVAL AND INSTALLATION OF RADIATOR GUARD ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF RADIATOR, OIL COOLER, AND CHARGE AIR COOLER ASSEMBLIES
REMOVAL AND INSTALLATION OF ENGINE AND HST PUMP ASSEMBLY
REMOVAL AND INSTALLATION OF DAMPER
SPREADING AND INSTALLATION OF TRACK SHOE ASSEMBLY
REMOVAL AND INSTALLATION OF HST MOTOR AND FINAL DRIVE ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF FINAL DRIVE ASSEMBLY
REMOVAL AND INSTALLATION OF IDLER AND RECOIL SPRING ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF RECOIL SPRING ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF IDLER ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF TRACK ROLLER ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF CARRIER ROLLER ASSEMBLY
REMOVAL AND INSTALLATION OF HST PUMP ASSEMBLY
REMOVAL AND INSTALLATION OF MAIN CONTROL VALVE ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF MAIN CONTROL VALVE ASSEMBLY
REMOVAL AND INSTALLATION OF BLADE ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF HYDRAULIC CYLINDER ASSEMBLIES
REMOVAL AND INSTALLATION OF OPERATOR`S SEAT FRAME ASSEMBLY
REMOVAL AND INSTALLATION OF FUEL TANK ASSEMBLY
REMOVAL AND INSTALLATION OF HYDRAULIC TANK ASSEMBLY
REMOVAL AND INSTALLATION OF HST CONTROLLER ASSEMBLY
OTHERS
HYDRAULIC CIRCUIT DIAGRAM(1/2)
HYDRAULIC CIRCUIT DIAGRAM(2/2)
ELECTRICAL CIRCUIT DIAGRAM(1/4)
ELECTRICAL CIRCUIT DIAGRAM(2/4)
ELECTRICAL CIRCUIT DIAGRAM(3/4)
ELECTRICAL CIRCUIT DIAGRAM(4/4)
AIR CONDITIONER CIRCUIT DIAGRAM
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):
D31EX-21 (SN: 50501-)
D31PX-21 (SN: 50501-)
D37EX-21 (SN: 05501-)
D37PX-21 (SN: 05501-)
D39EX-21 (SN: 01501-)
D39PX-21 (SN: 01501-)
Format: PDF, 745 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
DAMPER
HST HYDRAULIC EQUIPMENT ARRANGEMENT DIAGRAM
STEERING, BRAKE CONTROL
SOLENOID VALVE
TOWING VALVE
FINAL DRIVE
HST PUMP
SAFETY-SUCTION VALVE
CHARGE SAFETY VALVE
CHARGE PUMP
TOWING VALVE
HST MOTOR
ELECTRIC LEVER (FOR STEERING)
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
PPC LOCK VALVE
ACCUMULATOR
HYDRAULIC PUMP
WORK EQUIPMENT CYLINDER
CONTROL VALVE
CLSS
PPC VALVE
WORK EQUIPMENT
CUTTING EDGE, END BIT
RIPPER
CAB RELATED
ENGINE CONTROL
HST CONTROL SYSTEM
GEAR SHIFT CONTROL SYSTEM
PARING BRAKE CONTROL SYSTEM
COMPONENT EQUIPMENT OF SYSTEM
MONITOR SYSTEM
MONITOR PANEL
SENSORS
TESTING AND ADJUSTING
STANDARD VALUE TABLE FOR ENGINE
STANDARD VALUE TABLE FOR CHASSIS
TESTING AND ADJUSTING
TROUBLESHOOTING
DISASSEMBLY AND ASSEMBLY
HOW TO READ THIS MANUAL
COATING MATERIALS LIST
SPECIAL TOOL LIST
SKETCHES OF SPECIAL TOOLS
REMOVAL AND INSTALLATION OF FUEL INJECTION PUMP ASSEMBLY
REMOVAL AND INSTALLATION OF CYLINDER HEAD ASSEMBLY
REMOVAL AND INSTALLATION OF ENGINE FRONT SEAL
REMOVAL AND INSTALLATION OF ENGINE REAR SEAL
REMOVAL AND INSTALLATION OF RADIATOR GUARD ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF RADIATOR, OIL COOLER, AND CHARGE AIR COOLER ASSEMBLIES
REMOVAL AND INSTALLATION OF ENGINE AND HST PUMP ASSEMBLY
REMOVAL AND INSTALLATION OF DAMPER
SPREADING AND INSTALLATION OF TRACK SHOE ASSEMBLY
REMOVAL AND INSTALLATION OF HST MOTOR AND FINAL DRIVE ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF FINAL DRIVE ASSEMBLY
REMOVAL AND INSTALLATION OF IDLER AND RECOIL SPRING ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF RECOIL SPRING ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF IDLER ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF TRACK ROLLER ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF CARRIER ROLLER ASSEMBLY
REMOVAL AND INSTALLATION OF HST PUMP ASSEMBLY
REMOVAL AND INSTALLATION OF MAIN CONTROL VALVE ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF MAIN CONTROL VALVE ASSEMBLY
REMOVAL AND INSTALLATION OF BLADE ASSEMBLY
DISASSEMBLY AND ASSEMBLY OF HYDRAULIC CYLINDER ASSEMBLIES
REMOVAL AND INSTALLATION OF OPERATOR`S SEAT FRAME ASSEMBLY
REMOVAL AND INSTALLATION OF FUEL TANK ASSEMBLY
REMOVAL AND INSTALLATION OF HYDRAULIC TANK ASSEMBLY
REMOVAL AND INSTALLATION OF HST CONTROLLER ASSEMBLY
OTHERS
HYDRAULIC CIRCUIT DIAGRAM(1/2)
HYDRAULIC CIRCUIT DIAGRAM(2/2)
ELECTRICAL CIRCUIT DIAGRAM(1/4)
ELECTRICAL CIRCUIT DIAGRAM(2/4)
ELECTRICAL CIRCUIT DIAGRAM(3/4)
ELECTRICAL CIRCUIT DIAGRAM(4/4)
AIR CONDITIONER CIRCUIT DIAGRAM
General
Generation
21Language
EnglishModel of Truck
D31EX-21, D31PX-21, D37EX-21, D37PX-21, D39EX-21, D39PX-21Region
JapanTruck Class
D31, D37, D39Type of Document
Workshop ManualType of Truck
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