Specifications

66
(2) Hydraulic oil pump
Problem
Possible cause
Remedy
Oil can not be
pumped out
Lower oil level in oil tank
Add oil up to specified oil level
Blocked pipe-line or oil filter
Clean or replace oil if necessary
Oil pump can not
be pressurized
Lining plate broken down
Replace
Wearing broken down
Seal ring, bushing or snap ring
broken down
Misadjusted relief valve
Adjust pressure to specified
value
Air entering into the pump
Retighten loose connections for
suction pipe
Add oil into oil tank
Replace oil seal
Noisy oil pump
Worn suction pipe or blocked
oil filter
Correct pipe or repair filter
Air entering in resulting from
loose suction connections
Retighten the connection
Too high oil stickiness
Use oil with proper stickiness
Air bubble in oil
Find out cause and correct them
Oil leakage
Oil seal or seal ring in pump
broken down
Replace
Pump broken down
Replace