Work Equipment Does Not Move In Its Single Operation - Komatsu PC130-8 Shop Manual

40 Troubleshooting
H-9 Work equipment does not move in its single operation
• Work equipment does not move in its sin-
Trouble
gle operation
Related
• Set the working mode at P mode for the troubleshooting.
information
Possible causes
and standard 1 Malfunction of PPC valve
value in normal
state
Malfunction of work equip-
2
ment control valve (spool)
PC130-8
Cause Standard value in normal state/Remarks on troubleshooting
a
Work equipment control lever
The spool in the work equipment control valve is presumed to mal-
function. Check the valve itself.
(1) The boom does not move when operated indepen-
dently.
(2) The arm does not move when operated indepen-
dently.
(3) The bucket does not move when operated inde-
pendently.
Stop engine for preparations. Start troubleshooting at engine
high idle.
NEUTRAL
Operation
SEN04124-00
PPC valve output pressure
0 MPa {0 kg/cm }
2
Above 2.7 MPa
{Above 28 kg/cm }
2
1
13