Komatsu PC88MR-10 Shop Manual page 976

40 Troubleshooting
Troubleshooting of hydraulic and mechanical system (H-
mode)
No. Cause
Malfunction of arm
control valve (pressure
9
compensation valve)
(arm OUT side)
Malfunction of bucket
control valve (pressure
10
compensation valve)
(bucket CURL side)
Malfunction of bucket
control valve (pressure
11
compensation valve)
(bucket DUMP side)
40-488
Procedure, measuring location, criteria, and remarks
a Check whether arm cylinder moves slowly to arm OUT side when
performing hydraulic relief of other work equipment. (If arm cylinder moves,
it is abnormal.)
a Check whether bucket cylinder moves slowly to bucket CURL side when
performing hydraulic relief of other work equipment. (If bucket cylinder
moves, it is abnormal.)
a Check whether bucket cylinder moves slowly to bucket DUMP side when
performing hydraulic relief of other work equipment. (If bucket cylinder
moves, it is abnormal.)
PC88MR-10