Komatsu PC500LC-10R, Shop Manual, Page: 493 / 758

8.
Adjust the hydraulic oil temperature so that it is within the specified range.
9.
Turn the fuel control dial to MAX (High idle) position.
10. Operate each control lever and switches, and measure the outlet pressure when the solenoid valve is ener-
gized and de-energized.
REMARK
• When the solenoid valve is energized and de-energized, the display of the machine monitor also
changes.
• For the conditions for turning the solenoid valve ON/OFF, see “OPERATING CONDITION OF SOLE-
NOID VALVE”.
See STANDARD VALUE TABLE, “STANDARD VALUE TABLE FOR MACHINE” for standard values.
Remove the testing tools and restore the machine after the test is finished.
OPERATING CONDITION OF SOLENOID VALVE
(1) 2-stage relief solenoid valve operation table
Operating condition of solenoid valve
Operating
state of sole-
noid valve
Overheat 1st setting is ON
OFF (de-ener-
gized)
When overheat 2nd setting is applied
All signals of work equipment, swing, and travel are OFF
Swing lock switch ON
ON (ener-
gized)
When travel signal is conducted
L mode
When boom lower signal is conducted
P-mode, E-mode
When one-touch power maxi-
mizing switch is turned on
When signals other than swing single
signal are conducted
When swing single signal is conducted
OFF (de-ener-
gized)
Other than the above conditions
(2) Attachment selector solenoid valve operation table (for the attachment installed specification)
Operating condition of solenoid valve
Operating
state of sole-
noid valve
Working mode
Other than B
OFF (de-ener-
gized)
B ON (ener-
gized)
(3) Machine push-up solenoid valve operation table
Operating condition of solenoid valve
Operating
state of sole-
noid valve
Machine push-up switch
OFF
ON (ener-
gized)
ON
OFF (de-ener-
gized)
30 TESTING AND ADJUSTING TEST OUTLET PRESSURE OF SOLENOID VALVE
PC500LC-10R 30-87