Komatsu PC138US-8, PC138USLC-8 Excavator Service Manual

Table of Contents

00 Index and foreword
01 Specification
10 Structure, function and maintenance standard
20 Standard value table
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 Excavator PC138US-8, PC138USLC-8

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.

When raising heavy components, use a hoist or crane. Check that the wire rope, chains and hooks are free from damage.
Always use lifting equipment which has ample capacity. Install the lifting equipment at the correct places. Use a hoist or crane and operate slowly to prevent the component from hitting any other part. Do not work with any part still raised by the hoist or crane.

Failure code [DAF8KB] Short circuit in camera power supply
Content of Trouble : Output power supply voltage (Rating: 8 V) from machine monitor to camera is below 6.0 V or above
10 V.
Action of
Machine monitor: Turns output power supply voltage (Rating: 8 V) to camera OFF. Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Please check the manual to see how to fix this failure.