Oil Flow In Attachment Circuit Cannot Be Controlled - Komatsu PC200-8M0 Shop Manual

500 Troubleshooting of hydraulic and mechanical system (H-mode)
H-29 Oil flow in attachment circuit cannot be controlled
H-29 Oil flow in attachment circuit cannot be controlled
For machines with provision for attachment
q
Failure Oil flow in attachment circuit cannot be changed
q
When attachment installation specification is employed, oil flow in service circuit changes accord-
Related infor- ing to selected user mode.
mation q How to adjust flow rate in ATT mode is different from that in B mode. For details, see Operation
and Maintenance Manual.
Malfunction of attachment
Probable
1 flow rate adjustment EPC
causes and cri-
valve
teria
Malfunction of service PPC
2
valve
PC200, 200LC, 220, 220LC-8M0
Cause
Attachment flow rate adjustment EPC valve may malfunction.
Check it.
Service PPC valve may have malfunction. Check it.
Criteria and troubleshooting procedure
SEN06139-00
41
40-500