Komatsu D31EX-21, D31PX-21, D37EX-21, D37PX-21, D39EX-21, D39PX-21 Bulldozer Shop Manual

Covers Komatsu crawler dozer models D31EX-21, D31PX-21, D37EX-21, D37PX-21, D39EX-21, D39PX-21. Includes specifications, diagrams, and detailed repair procedures. Ref: SEBM035005

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Komatsu Models Covered & Key Technical Specifications

Komatsu D31EX-21, D31PX-21, D37EX-21, D37PX-21, D39EX-21, D39PX-21 (SEBM035005) - 2007 Covers D31EX-21, D31PX-21, D37EX-21, D37PX-21, D39EX-21, D39PX-21 bulldozer models. | Komatsu Shop Manual for Crawler Dozer Models

Designated Technical Resolution Data: 1200 dpi establishes the maximum print output Architecture.
Verified Print Rate: For optimal operation, 25 ppm defines the maximum printing consumption Threshold.
Nominal Unit Dimensions: 4015 mm -- signifies the overall machine length Parameters.
Defined Bolt Torques: The formatter board requires 46 Nm for standard operation Logic.
Key Displacement Data: Maximum throughput reaches 40.2 cc/rev Configurations.
Essential Thermal Envelope: The plotter requires 30 mm for standard operation Configurations.

Technical Specifications

Document Number / Seller:: 30621 / Rebecca Murphy
File Size:: 37.66 MB
File Type:: PDF
Language:: English
Pages:: 745
Printable:: Yes
Category:: Bulldozer
Last updated / verified: Apr 22, 2026

Komatsu Manual Features & Content Preview

Structured Shop Wiring Manual: Komatsu Shop Manual for Crawler Dozer Models D31EX-21, D31PX-21, D37EX-21, D37PX-21, D39EX-21, D39PX-21 2007 Diagnostic-Reference

System-Coverage: All models covered // Subsystem-Focus: Engine, HST, Work Equipment Logic // Reference-Category: Service Procedures

Metric	Technical-Path	Calibration-Standards
Engine Specs	Engine, Cooling System, Lubricants	Standard Values
HST System	Hydraulic Pump, HST Motor, Control Valve	Specifications
Work Equipment	Cylinders, PPC Valves, Blade, Ripper	Procedures
Chassis	Track Frame, Rollers, Sprockets	Maintenance Standards
Electrical	Wiring Diagrams, Monitor Panel, Sensors	Schematics
Troubleshooting	Failure Codes, Diagnostic Procedures	Repair Guidelines

Following OEM groupings, the manual includes sections on:

Engine Specifications and Maintenance Standards

This section systematically requiring engine-related specifications and essential maintenance values. It provides a Rigorous overview of engine performance parameters.

Hydraulic System Components and Operation

Service procedures are documented for HST pump, HST motor, and control valve systems, detailing their operation and maintenance requirements.

Work Equipment Systems

Calibration requirements are specified for lift, tilt, angle, and ripper cylinders and related PPC valves, ensuring precise operation.

Chassis Components and Maintenance

This section covers track frame, rollers, sprockets, and idlers, detailing their specifications and maintenance procedures.

Troubleshooting and Diagnostics

This section provides guidance on diagnosing and resolving common issues, including fault codes and repair procedures.

Electrical System and Monitor Panel Functions

It details the electrical system, monitor panel functions, and sensor information, crucial for system diagnostics.

Manual FAQ, Purchase & Download Details

Which system sections contain the specification tables and maintenance standard reference data?

Shop manual contains dedicated sections that list maintenance standard values and technical specifications for the machine components.

Are wiring diagrams and connector references included for the bulldozer electrical systems?

Document includes comprehensive electrical circuit diagrams and coding tables to assist in identifying wire types and colors. It also provides reference material for understanding the electrical architecture of the equipment.

Is the D31EX-21 model series coverage included in this shop manual?

Manual covers the D31EX-21, D31PX-21, D37EX-21, D37PX-21, D39EX-21, and D39PX-21 bulldozer models.

What content does the disassembly and assembly chapter include regarding hardware and technical reference data?

Chapter lists necessary information for specific components including tightening torque values and quantities for fluids. It also contains guidance on special tools, weight details, and essential precautions for component handling. These sections are organized to provide clear technical reference points for workshop activities.