Komatsu PC500LC-10R Shop Manual page 471

30 TESTING AND ADJUSTING
3.
Remove the oil pressure pickup plugs (PFC) and (PRC).
(PFC): Front pump discharge pressure pickup port
(PRC): Rear pump discharge pressure pickup port
4.
Install the nipple C in the hydraulic tester A to the position
where the oil pressure pickup plugs (PFC) and (PRC) were
removed.
5.
Connect the gauge A1 of hydraulic tester A to the nipple C.
REMARK
Gauge in the digital hydraulic tester B can also be used in-
stead of the gauge A1.
6.
Start the engine.
7.
Select and display "Pre-defined Monitoring" (01/11) by re-
ferring to "SET AND OPERATE MACHINE MONITOR".
8.
Adjust the hydraulic oil temperature so that it is within the
specified range.
9.
Set the working mode to P ("Power Mode").
10. Turn off the auto-deceleration.
11. Turn the fuel control dial to MAX (High idle) position.
12. Check the pump pressure when all control levers and con-
trol pedals are in NEUTRAL position.
The pressure when the unload valve operates is displayed.
See STANDARD VALUE TABLE, "STANDARD VALUE TA-
BLE FOR MACHINE" for standard values.
Remove the testing tools and restore the machine after the test is finished.
METHOD FOR TESTING WORK EQUIPMENT RELIEF PRESSURE BY MACHINE
MONITOR
1.
Start the engine.
2.
Select "Pre-defined Monitoring" (04/11) or "Monitoring Se-
lection Menu" and display the following monitoring items
by referring to "SET AND OPERATE MACHINE MONI-
TOR".
Monitoring code: 01100 "Front Pump Pressure"
Monitoring code: 01101 "Rear Pump Pressure"
Monitoring code: 04401 "Hydraulic Oil Temperature"
3.
Adjust the hydraulic oil temperature so that it is within the
specified range.
4.
Set the working mode to P ("Power Mode").
5.
Turn the swing lock switch to OFF position.
6.
Operate the cylinders to be checked to the stroke end.
REMARK
Turn the secondary work equipment actuation switch to OFF position when oil pressure in boom circuit is
relieved.
7.
Turn the fuel control dial to MAX (High idle) position.
PC500LC-10R
TEST AND ADJUST OIL PRESSURE IN WORK EQUIPMENT, SWING,
AND TRAVEL CIRCUITS
30-65