Komatsu ecot3 PC300LC-8 Shop Manual page 777

40 Troubleshooting
• Machine push-up function does not oper-
Trouble
ate normally.
Related infor-
• When machine push-up function is set to low pressure, solenoid is energized.
mation
Defective machine push-up
1
switch (Internal short circuit)
Possible causes
and standard
value in normal
state
Hot short (Short circuit with
2
24V circuit) in wiring harness
Circuit diagram related to machine push-up solenoid
PC300, 350-8
Cause Standard value in normal state/Remarks on troubleshooting
a
Between (5) – (6)
a
Wiring harness between S05 (male) (6) –
J01 – V06 (female) (2), – D02 (female) (2)
and chassis ground
(2) Machine push-up function does not release.
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Machine push-up
S05 (female)
Low pressure set
High pressure set
Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
SEN02632-02
Resistance
switch
Max. 1 z
Min. 1 Mz
Voltage Max. 1 V
37