Komatsu Galeo PC800-8 Shop Manual page 803

40 Troubleshooting
Defective pump EPC cur-
5
rent output
Possible causes
and standard
value in normal
state
Malfunction of pump EPC
6
solenoid valve
Malfunction of pump VC
7
valve
Fig. 1: Control system devices
PC800, 850-8
Cause Standard value in normalcy and references for troubleshooting
aKeep the engine stopped for the preparations, and run it at high idle
during troubleshooting (Start troubleshooting after checking that
causes 2, 4 are not detected).
Idle travel (Lever full stroke)
aKeep the engine stopped for the preparations, and run it at high idle
during troubleshooting. (Start troubleshooting after checking that
cause 5 is not detected.
Idle travel (Lever full stroke)
Refer to Fig. 1 in H-2.
Control levers
All levers in neutral
Control levers
All levers in neutral
SEN00794-02
Pump EPC current
265 ± 50 mA
575.5 ± 50 mA
Jet sensor differential pressure
Max. 0.78 MPa
{Max. 8 kg/cm 2 }
Min. 1.23 MPa {Min. 10.5 kg/cm 2 }
9