Komatsu HM300-3 Dump Truck Service Manual

Table of Contents

00 Index and foreword
01 Specification
10 Structure, function and maintenance standard
20 Standard value table
30 Testing and adjusting
40 Troubleshooting
50 Disassembly and assembly
90 Diagrams and drawings

GENERAL
This section lists the general machine dimensions, performance specifications, component weights, and fuel, coolant and lubricant specification charts.

STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
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, ADJUSTING AND TROUBLESHOOTING
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 Problems to Causes are also mention in this section.

DISASSEMBLY AND ASSEMBLY KOMATSU Dump Truck HM300-3

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.

Defective wiring harness or engine controller

1. Turn starting switch to OFF position.
2. Disconnect TEMP3 (KDPF outlet temperature sensor).
3. Turn starting switch to ON position.
If failure code [CA3319] is not displayed, wiring harness or engine controller is defective.
a Perform check on cause 2 again.
1. Turn starting switch to OFF position.
2. Disconnect TEMP3 and connect T-adapter to female side.
3. Connect T-box to T-adapter and connect pins (1) and (2) of T-box by using jumper cable.
a Connect ground line to signal line
4. Turn starting switch to ON position.
If failure code [CA3321] is not displayed, wiring harness or engine controller is defective.
a Perform check on cause 2 again.