Unusual Noise Comes Out From Around Hydraulic Pump - Komatsu PC200-8M0 Shop Manual

500 Troubleshooting of hydraulic and mechanical system (H-mode)
H-4 Unusual noise comes out from around hydraulic pump
H-4 Unusual noise comes out from around hydraulic pump
q
Failure Unusual sound is heard from around hydraulic pump
Related infor-
mation
Lowering of hydraulic oil
1
level
Probable
2 Defective hydraulic oil
causes and cri-
Clogging of hydraulic tank
3
teria
cap
Clogging of hydraulic tank
4
strainer
5 Defective piston pump
PC200, 200LC, 220, 220LC-8M0
Cause
Hydraulic oil level may be low. Check it.
Air may be mixed in hydraulic oil. Check oil.
Negative pressure may be generated in hydraulic tank because of
clogged hydraulic tank cap. Check cap.
Negative pressure may be generated in suction circuit because of
clogged hydraulic tank strainer. Check strainer.
Piston pump may have internal defect. Check it.
Criteria and troubleshooting procedure
SEN06139-00
13
40-500