Steering torque is
insufficient
Loss flow of steering pump is inadequate.
Inspect or replace the steering pump
Pressure change of the safety pressure
valve
Adjust its pressure (pressure)
Steering pump leaks seriously inside.
Lift arm raising
force or bucket
tilting force is
inadequate
Oil seal of the cylinder is worn or
damaged
Distribution valve is excessively worn,
the fitting gap between valve rod and
valve body exceeds the specified value .
Dismount and repair, to make the
clearance reach to the required value
or replace the distribution valve
Pipeline system leaks oil.
Find out the leaking point and remove
it.
The working pump/steering pump
seriously leaks inside.
Replace working pump//steering pump
Safety valve is adjusted improperly; the
system pressure is too low.
Adjust the system pressure to the
specified value
Oil tube and oil filter is blocked
Clean oil filter and change oil
Energy
accumulator cannot
be normally
released.
Oil pipe or joint of energy accumulator
leaks.
Check oil pipe or joint for leakage and
replace it.
The charging pressure of energy
accumulator is wrongly set.
Check the charging pressure of energy
accumulator.
The oil pipe of energy accumulator is
blocked.
Check the oil pipe of energy
accumulator.
Filling valve does not work.
Replace the filling valve.
Energy
accumulator begins
to be filled with
liquid, but cannot
reach the upper
pressure limit.
There is no oil in oil tank or oil level is
too low.
Check the oil level in oil tank.
Pump is too old or does not work and it
cannot transmit the whole flow or
pressure.
Filling valve does not work.
Replace the filling valve.
Filling time of
energy
accumulator is too
long.
Pump is too old or does not work and it
cannot transmit the whole flow or
pressure.
Filling valve does not work.
Replace the filling valve.
Filling of energy
accumulator fails.
There is no oil in oil tank or oil level is
too low.
Check the oil level in oil tank.
Pump is too old or does not work.
Check the pressure or flow of pump.
Overflow valve does not work.
Check the setting of overflow valve.
Air exists in oil pipe of energy
accumulator.
Release the air in oil pipe.
Filling valve does not work.
Replace the filling valve.
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