20
Ⅺ.
Common faults and trouble shooting:
:
Faults
Possible cause
Trouble shooting
Abnormal noise
during lifting
The oil-absorptive filter is blocked
Clean or replace the oil-absorptive filter
The oil-absorptive tube leaks and the oil
are foaming.
Fasten the tie-in, check the oil level, or add
some oil.
Hydraulic pump or motor is damaged.
Contact maintenance personnel of our
company
Seal malfunction, and make the air enter
oil pump.
Contact maintenance personnel of our
company
The viscidity of oil is not correct, oil level
is too low.
Replace the oil or add some oil
Hydraulic
system has no
pressure or the
pressure is too
low
Malfunction in pump oil-absorptive, and
noise exists.
Replace the oil or add some oil
Oil pump is damaged
Replace the oil or add some oil
There is malfunction in valve pack.
Contact maintenance personnel of our
company
The pipeline is broken or leaking.
Contact maintenance personnel of our
company
The viscidity of oil is not suitable; the
leakage loss is too great.
Replace the pipeline or screw down the tie-in.
The
oil
pressure is not
stable
The cause is the same as that of
abnormal noise.
Refer to the treatment methods for abnormal
noise.
The lifting cylinder or seal ring is worn.
Replace the cylinder sleeve or seal ring
The quantity of oil is not enough
Add oil
The
truck
cannot start
Storage battery is used up.
Inspect, charge, or replace the storage
battery
The wire terminal is loosened.
Screw down the terminal screw
The fuse is burn out.
Replace the fuse
The accelerator is damaged.
Replace accelerator
The direction is
ineffective
The steering device is blocked by the
abnormal matter.
Clean up the foreign matter.
The steering potentiometer is loosened
or invalid.
Replace the potentiometer or screw down the
mounting screws.
The steering power unit is faulty or wire
terminal is loosened.
Tighten the screws or consult the
maintenance personnel of our company.
Malfunction of steering controller
Consult the maintenance personnel of our
company.
Brake cannot
work
The
friction
plates
of
the
electromagnetic brake are damaged.
Replace
Inching switch is damaged or ineffective
connection.
Tighten it or replace it
Steering potentiometer is damaged or
loosened.
Tighten or replace it after adjustment
Malfunction of controller
Consult the maintenance personnel of our
company.
Not
release
after braked
The electromagnetic brake is out of
electricity.
Check the circuit.
The clearance of the electromagnetic
brake is too large.
Adjust the brake clearance to 0.2mm.
