Komatsu PC500LC-10R Shop Manual page 473

30 TESTING AND ADJUSTING
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 ON position.
REMARK
If the swing lock switch is turned on, the main relief valve is set for high-pressure relief.
6.
Turn the fuel control dial to MAX (High idle) position.
7.
Measure the "Front Pump Pressure" and "Rear Pump Pressure" by operating the swing control lever to re-
lieve the oil pressure in the right or left swing circuit.
The pressure of the swing motor safety valve is displayed on the monitor.
REMARK
The set pressure of the swing motor safety valve is lower than that of the main relief valve. If the swing
circuit is relieved, the safety valve is relieved as well.
See STANDARD VALUE TABLE, "STANDARD VALUE TABLE FOR MACHINE" for standard values.
METHOD FOR TESTING SWING RELIEF PRESSURE BY TESTING TOOLS
1.
Release the remaining pressure by referring to "RELEASE REMAINING PRESSURE FROM HYDRAULIC
SYSTEM".
2.
Open the cover on the left side of the machine.
PC500LC-10R
TEST AND ADJUST OIL PRESSURE IN WORK EQUIPMENT, SWING,
AND TRAVEL CIRCUITS
30-67