Komatsu PC300LC-6 and PC300HD-6 Excavator Service Manual

Table of Contents

00 FORWARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 00-1
01 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01-1
10 STRUCTURE AND FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
20 TESTING, ADJUSTING AND TROUBLESHOOTING . . . . . . . . . . 20-1
30 DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . 30-1
40 MAINTENANCE STANDARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40-1
90 OTHER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90-1

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.

POWER MAX. FUNCTION
During digging operations, when that extra bit of digging power is needed (for example, when digging up boulders), the left knob switch can be pressed to raise the hydraulic pressure by approx.
10% and increase the digging force.
If the left knob switch is pressed ON when the working mode is at H/O or G/O, each function is automatically set as follows.
Working mode . . . . . . . . . . . . . . . . . . . . . . . Heavy duty operations
Engine, pump controller . . . . . . . . . Matching at rated output point
Cut off function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Canceled
Actuating time . . . . . . . . . . . . . . . . . . . . Auto cancel after 8.5 sec.