93
Fault Characteristics & Causes
Elimination Approaches
1. The pump neither sucks oil nor has
pressure (the actuating mechanism does not
work).
a
）
The filter or the suction pipe is clogged.
b
）
The joint leaks causing air to go into the
pump.
c
）
The parts are worn causing excessive
clearance and serious leakage.
d
）
The fluid has large viscosity so that the
blade meets with large sliding resistance.
e
）
The fluid level is too low.
a) Dismantle and clean the filter and the pipe; or
replace the fluid.
b) Check and tighten related threaded connecting
part or replace the sealing part to prevent air invasion
strictly.
c) Check the related worn parts and grind.
d) Replace with the fluid having low viscosity.
e) Fill the fluid to the specified level.
2. Oil leaks from the junction of oil port.
a
）
The joint is loose or the sealing part is
damaged.
a
）
Tighten the threaded connecting part or replace
the sealing part.
3. The noise is loud.
a
）
Air goes into the pump.
b
）
There has too large compression shock;
a
）
Check the related parts for leakage; add butter
at the joints; reduced noise shows there is
leakage, tighten the joints or replace the sealing
ring.
