Test And Adjust Oil Pressure In Pump Ls Control Circuit; Method For Testing Ls Differential Pressure By Machine Monitor - Komatsu PC500LC-10R Shop Manual

TEST AND ADJUST OIL PRESSURE IN PUMP LS CONTROL CIRCUIT

TEST AND ADJUST OIL PRESSURE IN PUMP LS CONTROL CIRCUIT
Testing and adjusting tools for oil pressure in pump LS control circuit
Symbol Part No.
- 799-101-5002
A 1 799-101-5110
2 799-101-5130
B - 790-261-1205
C 799-101-5220
D 07002-11023
E 799-401-2701
796T - 440 -
F
1101
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.
k
Provide an enough work space to run the track idle off the ground.
Test this item under the following conditions.
Hydraulic oil temperature : 45 to 55 °C
Before testing this item, check that the oil pressure in the work equipment, swing, and travel circuits and control
circuit oil pressure is normal.
For testing of pump LS control circuit source pressure to perform troubleshooting or others, refer to this section.

METHOD FOR TESTING LS DIFFERENTIAL PRESSURE BY MACHINE MONITOR

1.
Open the cover on the left side of the machine.
2.
Remove the oil pressure pickup plugs (PLSFC) and
(PLSRC).
(PLSFC): Front load pressure pickup port
(PLSRC): Rear load pressure pickup port
30-80
Part name
Hydraulic tester
Gauge
Gauge
Digital hydraulic tester
Nipple
O-ring
Differential pressure gauge
Sensor adapter
30 TESTING AND ADJUSTING
Q'ty Remarks
1
1 Pressure range : 60 MPa
1 Pressure range : 6 MPa
1 Pressure range : 70 MPa
4 Size: M10 x 1.25 mm
4
1 Pressure range : 50 MPa
1 Pressure range : 50 MPa
PC500LC-10R