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