Komatsu D155AX-3 Dozer Service Manual

Table of Contents

01 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . 01
10 STRUCTURE AND FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . 10
20 TESTING AND ADJUSTING . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
30 DISASSEMBLY AND ASSEMBLY ……………………………………..30
40 MAINTENANCE STANDARD ……… …………………………………40
90 OTHERS ………………………………………………………………………..90

1. General Instructions
This section presents under one heading the basic information and procedures common to the sections on “Disassembly and Assembly”, “Testing and Adjustments”, “Troubleshooting”, and “Removal and Installation”. It is essential for the serviceman to thoroughly understand and know this section till it becomes a part of his common sense.

2. Structure and Function.
This section gives a detailed explanation of the “Structure” with details and drawings of the “Constituent Parts” and “block” or “circuit” diagrams, arranged for the serviceman, but also useful as a textbook for training service personnel. The Training Aids should is use to cover the basic theory in this Manual.

3. Testing and Adjustments.
Procedures of all the necessary “Tests” and “Adjustments” are describe with photographs showing the necessary measuring equipment and the location for making the measurements. This should aid the serviceman in his trouble shooting, checking and adjusting work.

4. Troubleshooting
Typical common troubles are listed and systematically described; with their causes and the procedures for finding and diagnosing the symptoms.
As it is impossible to list all of the possible troubles, the serviceman should study the sections covering the “Structure and Function” and “Testing and Adjustments” and apply this knowledge to diagnose any non-listed troubles.

5. Manual Specifications
In this section, all standard dimensions and tolerances that are necessary to perform Testing and Adjustments is mention with drawings together with, appropriate procedures for disassembly and assembly, performing repairs, or troubleshooting. However, basic dimensions and tolerances, for repairs or rebuilding, are limited to those machine parts most commonly worked on.

ASSEMBLY OF HMT MOTOR
ASSEMBLY* The procedure for assembling the front and rear motors is basically the same, so only the procedure for assembling the front motor is given here. In cases where there is a difference in the procedure for the front and rear motors, the procedure for the rear motor is given separately.
Precautions when assembling
1) Clean and dry all parts thoroughly before assembling.
2) Be careful not to damage any parts or to let dirt or dust get in.
3) Handle all parts carefully and do not hit them against other objects or drop them, or subject them to any shock.
4) Keep the front and rear parts separate and be careful not to mix them.
5) Replace the O-rings and oil seals with new parts.
6) Coat the sliding surfaces with engine oil (EOIO-CD) before assembling.
Use a torque wrench and tighten all parts to the specified torque.