Work Equipment Does Not Move In Its Single Operation - Komatsu PC200-8M0 Shop Manual

SEN06139-00
H-9 Work equipment does not move in its single operation
(1) Boom does not move independently.
Failure (2) Arm does not move independently.
(3) Bucket does not move independently.
Related infor-
q
Perform all troubleshooting with working mode in power mode (P).
mation
Probable
1 Malfunction of PPC valve
causes and cri-
teria
Malfunction of control valve
2
(spool)
18
40-500
500 Troubleshooting of hydraulic and mechanical system (H-mode)
Cause
a Be ready with engine stopped, then troubleshoot with engine
high idle.
Work equipment control lever
Spool of control valve may malfunction. Check it.
H-9 Work equipment does not move in its single operation
Criteria and troubleshooting procedure
Neutral
Operation
PC200, 200LC, 220, 220LC-8M0
PPC valve output pressure
0 MPa
2
{0 kg/cm }
2.84 to 3.43 MPa
2
{29 to 35 kg/cm }