Speed Or Power Of Bucket Is Low - Komatsu PC200-8M0 Shop Manual

500 Troubleshooting of hydraulic and mechanical system (H-mode)
H-8 Speed or power of bucket is low
H-8 Speed or power of bucket is low
q
Failure

Speed or power of bucket is low

Related infor-
q
Perform all troubleshooting with working mode in power mode (P).
mation
Malfunction of right PPC
1
valve (bucket circuit)
Malfunction of bucket control
2
valve (spool)
Probable
Malfunction of bucket control
causes and cri-
3 valve (pressure compensa-
teria
tion valve)
Malfunction or defective
4 sealing of bucket control
valve (safety-suction valve)
Malfunction of service con-
5
trol valve (LS shuttle valve)
6 Defective bucket cylinder
PC200, 200LC, 220, 220LC-8M0
Cause
a Be ready with engine stopped, then troubleshoot with engine
high idle.
Right work equipment control
Spool of bucket control valve may malfunction. Check it.
Pressure compensation valve of bucket control valve may malfunc-
tion. Check it.
Safety-suction valve of bucket control valve may malfunction or
sealing may be defective. Check it.
LS shuttle valve of service control valve may malfunction.
Check it.
a Be ready with engine stopped, then troubleshoot with engine
high idle.
Right work equipment control
Criteria and troubleshooting procedure
lever
Neutral
Bucket CURL
Bucket DUMP
lever
Bucket CURL relief
SEN06139-00
PPC valve output pressure
0 MPa
2
{0 kg/cm }
2.84 to 3.43 MPa
2
{29 to 35 kg/cm }
Leakage from bucket cylinder
20 cc/min
40-500
17