Measuring Fan Pump Epc Solenoid Valve Output Pressure - Komatsu Galeo PC800-8 Shop Manual

SEN00912-02
Measuring fan pump EPC
solenoid valve output pressure
a Measuring instruments for fan pump EPC sole-
noid valve output pressure
Symbol Part Number
799-101-5002
1
790-261-1204
U
799-101-5220
2
07002-11023
a Measure the fan pump EPC solenoid valve out-
put pressure
• Hydraulic oil temperature: 45 – 55°C
a Since the basic pressure of the EPC solenoid
valve output pressure is the control circuit pres-
sure, check that the control circuit pressure is
normal before measuring the EPC solenoid
valve output pressure.
k Lower the work equipment to the ground and
stop the engine. Then, operate the control le-
vers several times to release the residual pres-
sure in the piping and loosen the hydraulic tank
cap gradually to release the internal pressure of
the hydraulic tank.
1) Remove oil pressure pickup plug (1) from
the top of the fan pump.
16
Part Name
Hydraulic tester
Digital hydraulic tester
Nipple (Max. 1.25 mm)
O-ring
2) Install nipple U2 and connect it to oil pres-
sure gauge [1] of hydraulic tester U1.
• Use the oil pressure gauge of 6.0 MPa
2
{60 kg/cm }.
3) Run the engine at high idle and measure the
solenoid output pressure.
4) After finishing measurement, remove the
measuring instruments and return the
removed parts.
30 Testing and adjusting
PC800, 850-8