Overview
The Komatsu HM300-3 dump truck repair service manual provides a technical reference for the covered equipment. Its purpose is to help locate information relevant to inspection, troubleshooting, servicing and repair, as applicable to the supplied publication.
The supplied contents outline identifies Manuals, 00 Index and foreword, 01 Specification and 10 Structure, function and maintenance standard. The table below follows the provided section names and selected topics; consult the manual for the exact procedures and specifications.
Important Information: Confirm the applicable serial-number or production range in the supplied documentation before selecting a procedure.
Table of Contents
Komatsu HM300-3 Manual
Main sections and selected subjects identified in the source documentation:
- Manuals: Service Manual, Operation and Maintenance Manual and Field Assembly
- 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
- STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
- TESTING, ADJUSTING AND TROUBLESHOOTING
- DISASSEMBLY AND ASSEMBLY KOMATSU Dump Truck HM300-3
- Defective wiring harness or engine controller
- Turn starting switch to OFF position.
- Disconnect TEMP3 (KDPF outlet temperature sensor).
- 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.
- Disconnect TEMP3 and connect T-adapter to female side.
- 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
- If failure code [CA3321] is not displayed, wiring harness or engine controller is defective.
Serial-Number Applicability
The covered production ranges or serial groups may affect the applicable procedures. Check the identification details on the machine against the source documentation.










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