MACHINE MODEL SERIAL NUMBER
D31EX-2150501 and up
D31PX-2150501 and up
D37EX-21 5501 and up
D37PX-21 5501 and up
D39EX-21 1501 and up
D39PX-21 1501 and up
This Komatsu shop manual may contain attachments and optional equipment that are not available in your area. Please consult your local Komatsu distributor for those items you may require.
Materials and specifications are subject to change without notice.
• D31, D37, D39EX, PX-21 mount the SAA4D102E-2 engine.For details of the engine, see the 102 Series Engine Shop Manual.
Komatsu D31EX D31PX Service Repair Manual
Table of Content:
01 GENERAL 01-1
10 STRUCTURE AND FUNCTION,
MAINTENANCE STANDARD 10-1
20 TESTING AND ADJUSTING 20-1
30 DISASSEMBLY AND ASSEMBLY 30-1
90 OTHERS 90-1
CONTENTS:
01 GENERAL
10 STRUCTURE AND FUNCTION, MAINTENANCE STANDARD
20 TESTING AND ADJUSTING
30 DISASSEMBLY AND ASSEMBLY
90 OTHERS
SAFETY NOTICE
Important safety notice proper service and repair are extremely important for safe machine operation. The service and repair techniques recommended by Komatsu and described in this manual are both effective and safe.
Some of these techniques require the use of tools specially designed by Komatsu for a specific purpose. To prevent injury to workers, the symbol is used to mark safety precautions in this manual. The cautions accompanying these symbols should always be followed carefully. If any dangerous situation arises or may possibly arise, first consider safety, and take the necessary actions to deal with the situation.
General precautions:
Mistakes in operation are extremely dan-gerous. Read the Operation and Mainte-nance Manual carefully before operatingthe machine.
- Before carrying out any greasing or repairs, read all the safety plates stuck to the machine. For the locations of the safety plates and a detailed explanation of precautions, see the Operation and maintenance manual.
2) Decide a place in the repair workshop to keep tools and removed parts. Always keep the tools and parts in their correct places. Always keep the work area clean and make sure that there is no dirt, water, or oil on the floor. Smoke only in the areas provided for smoking. Never smoke while working.
3) When carrying out any operation, always wear safety shoes and helmet. Do not wear loose work clothes, or clothes with buttonsmissing.•Always wear safety glasses when hitting parts with a hammer.
4) When carrying out any operation with 2 or more workers, always agree on the operating procedure before starting. Always inform your fellow workers before starting any step of the operation. Before starting work, hang under REPAIR warning signs in the operator’s compartment.
5) Only qualified workers must carry out work and operation which require license or qualification.
6) Keep all tools in good condition, learn the correct way to use them, and use the proper ones of them. Before starting work, thoroughly check the tools, machine, forklift, service car, etc.
7) If welding repairs are needed, always have a trained and experienced welder carry out the work. When carrying out welding work, always wear welding gloves, an apron, shield-ing goggles, caps, and other clothes suited for welding work.
Komatsu D31EX D31PX Service Repair Manual
