Test Outlet Pressure Of Solenoid Valve; Method For Testing Outlet Pressure Of Solenoid Valve - Komatsu PC500LC-10R Shop Manual

TEST OUTLET PRESSURE OF SOLENOID VALVE

TEST OUTLET PRESSURE OF SOLENOID VALVE
Testing tools for solenoid valve outlet pressure
Symbol Part No.
- 799-101-5002
A 1 799-101-5130
2 799-101-5160
B 790-261-1205
C 799-401-3100
D 02896-11008
E 799-401-3200
F 02896-11009
k
Lower the work equipment to the ground, and stop the engine. Operate the control levers several
times to release the remaining pressure in the piping, and then loosen the oil filler cap of the hy-
draulic tank slowly to release the internal pressure.
Test this item under the following conditions.
Hydraulic oil temperature : 45 to 55 °C
Before testing this item, check that the control circuit oil pressure is normal.
For testing of outlet pressure of solenoid valve to perform troubleshooting or Pm Clinic, or periodic maintenance,
etc. refer to this section.

METHOD FOR TESTING OUTLET PRESSURE OF SOLENOID VALVE

1.
Release the remaining pressure by referring to "RELEASE REMAINING PRESSURE FROM HYDRAULIC
SYSTEM".
2.
Remove the upper cover of the control valve.
3.
Disconnect the outlet hoses (1) to (8) of the solenoid valve
to be tested.
(1): 2-stage relief solenoid valve
(2): Attachment selector solenoid valve
(3): Machine push-up solenoid valve
(4): Swing parking brake solenoid valve
(5): Travel speed increase solenoid valve
(6): Travel junction solenoid valve
(7): 2-stage swing relief solenoid valve
(8): PPC lock solenoid valve
4.
Install the adapter C or adapter E, and connect the disconnected hose again.
5.
Install the nipple A2 to the adapter C or the adapter E, and connect it to gauge A1.
REMARK
Gauge in the digital hydraulic tester B can also be used instead of the gauge A1.
6.
Start the engine.
7.
Select "Monitoring Selection Menu" and display the following monitoring items by referring to "SET AND
OPERATE MACHINE MONITOR".
Monitoring code: 04401 "Hydraulic Oil Temperature"
Monitoring code: 02300 "Solenoid Valve 1"
Monitoring code: 02301 "Solenoid Valve 2"
30-86
Part name
Hydraulic tester
Gauge
Nipple
Digital hydraulic tester
Adapter
O-ring
Adapter
O-ring
30 TESTING AND ADJUSTING
Q'ty Remarks
1
1 Pressure range: 6 MPa
1 Size: R1/8
1 Pressure range: 70 MPa
1 Size: 02
1
1 Size: 03
1
PC500LC-10R