9
Troubleshooting
Problems
Possible Causes
Solutions
The forks can’t be lifted to the
maximum lift height.
Hydraulic oil is not enough.
Add appropriate filtrated working
oil.
The forks can’t return to the lowest
position.
Too much hydraulic oil.
Take out appropriate working oil.
The rotary parts are deformed or
blocked.
Replace the parts.
The trunk piston and guides
bushing are blocked.
The forks can’t drop after lifted.
There is something abnormal in
the unloading device.
Readjust the unloading device.
The parts are deformed and
damaged.
Replace the deformed and
damaged parts.
Hydraulic oil leakage.
The oil seal is unavailable.
Replace the oil seal.
The surface of some parts is
damaged or worn.
Replace the damaged parts.
The coupled places become
loosened.
Fasten the loosened place again.
The fork can’t be lifted.
The viscosity of the working oil is
too high, or there is no working oil.
Replace the working oil.
There is impurity in the oil.
Clear up the impurity and add new
working oil.
There is something abnormal in
the unloading device.
Readjust the unloading device.
When the handle is rocked, the
forks drop immediately after they
are lifted; the handle returns or the
forks drop markedly after they are
lifted.
The valve of oil pump is blocked by
abnormal matter.
Open the valve and take out the
parts. Then re-install the parts after
they are cleaned.
