Komatsu PC95-1 Excavator Service Manual

Table of Contents

10 Structure, function
20 Testing and Adjusting
40 Disassembly and assembly

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.

CHECKING THE INITIAL HORSEPOWER CONTROL POINTFOR THE 3-CIRCUIT CONTROL VALVE

1 – Disconnect the hose (1) from the port X2 and cap it.
2 – Connect the two pressure gauges E1 (600 bar) to the adapters M1 and M2 of the control valve (1st and 2nd section).
3 – Connect the pressure gauge E3 (250 bar) to the port G of the pump.
4 – Start the engine and bring it up to high idling speed.
5 – Raise the boom completely and close the arm completely.
6 – Move the swing control lever to the end of its stroke in one direction or another. At the same time, slowly move the arm-closing lever and activate the boom raising lever in order to pressurize the pumps.
H The pumps should come up to pressure slowly and simultaneously.
7 – Check at which point the pressure gauge E3 (250 bar) starts the pressure-indicating movement (intervention point).
H If the intervention is early or delayed, adjust it with the cartridge (1) after having loosened the nut (2).
. To BRING FORWARD the intervention point, turn in a CLOCKWISE direction.
. To DELAY the intervention point, turn in an COUNTERCLOCKWISE direction.
H Intervention point: 110w5 bar.
8 – Stop the engine, release any residual pressures, and re-assemble the hydraulic circuit.