Komatsu HD320-3, HD325-3 Dump Truck Service Repair Manual

Shop Manual: 690 pages
Operation and Maintenance Manual: 159 pages
Serial Number:
HD320-3 (2501 and Up)
HD325-3 (1501 and Up)
Manual: Shop Manual, Operation and Maintenance Manual
01 GENERAL No.of page
01 GENERAL INSTRUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01-1
10 ENGINE RELATED COMPONENT
11 STRUCTURE AND FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1
1 2 TESTING AND ADJUSTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1
1 3 DISASSEMBLY AND ASSEMBLY 13-1
20 POWER TRAIN
21 STRUCTURE AND FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-1
22 TESTING AND ADJUSTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-1
23 DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-1
24 MAINTENANCE ST AND ARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-1
40 STEERING SYSTEM
41 STRUCTURE AND FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 -1
42 TESTING AND ADJUSTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42-1
43 DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43-1
44 MAINTENANCE ST AND ARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44-1
50 AIR SYSTEM
51 STRUCTURE AND FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51-1
53 DISASSEMBLY AND ASSEMBLY ……………………………….. 53-1
54 MAINTENANCE ST AND ARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54-1
60 HYDRAULIC CONTROL
61 STRUCTURE AND FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61-1
62 TESTING AND ADJUSTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62-1
63 DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63-1
64 MAINTENANCE STANDARD ……………………………………. 64-1
70 WORK EQUIPMENT
71 STRUCTURE AND FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71-1
72 TESTING AND ADJUSTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72-1
73 DISASSEMBLY AND ASSEMBLY ……………………………….. 73-1
74 MAINTENANCE STANDARD ……………………………………. 74-1
80 ELECTRICAL SYSTEM
81 STRUCTURE AND FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81-1
90 OTHERS
91 STRUCTURE AND FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91-1
92 TESTING AND ADJUSTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92-1
For ease of understanding, the manual is divided into chapters for each main group of components; these chapters are further divided into the following
sections.
Structure and function
This section explains the structure and function of each component. It serves not only to give an understanding of the structure, but also serves as
reference material for troubleshooting.
Testing and adjusting

This section explains checks to be made before and after performing repairs, as well as adjustments to be made at completion of the checks and repairs.· Troubleshooting charts correlating “Diagnoses” to “Causes” are also included in this section.

Disassembly and assembly
This section explains the order to be followed when removing, installing, disassembling or assembling each component, as well as precautions to be taken for these operations.
Maintenance standards
This section gives the judgement standards when inspecting disassembled parts.