Komatsu PC290LC-10 Excavator Service Manual

Table of Contents

01 GENERAL
10 STRUCTURE AND FUNCTION
20 STANDARD VALUE TABLES
30 TESTING AND ADJUSTING
40 TROUBLESHOOTING
50 DISASSEMBLY AND ASSEMBLY
60 MAINTENANCE STANDARD
80 AIR CONDITIONER
90 DIAGRAMS AND SCHEMATICS

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

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.

Change hydraulic oil when the temperature is high

• When hydraulic oil or other oil is warm, it flows easily. In addition, sludge can also easily be drained out from the circuit together with the oil, so it is best to change oil when it is still warm. When changing the oil, as much as possible of the old
hydraulic oil must be drained out. (Drain the oil from the hydraulic tank, also drain the oil from the filter and from the drain plug in the circuit.) If any old oil is left, contaminants and sludge in it will mix with the new oil and will shorten the life of the hydraulic o