14
8-TROUBLESHOOTING
PROBLEM
CAUSES
REMEDY
Motor does not run and
will not raise
The wire connection is loose.
Check and make a good connection.
The motor is burnt
Replace it.
Motor runs but will not
raise
The motor runs reversely.
Check the wire conenction.
Overflow valve is loose or jammed.
Clean or adjust it.
The gear pump is damaged.
Replace it.
Oil level is too low.
Add oil.
The oil hose became loose or dropped
off.
Tighten it.
The cushion valve became loose or
jammed.
Clean or adjust it.
Platforms go down
slowly after being raised
The oil hose leaks
Check or replace it.
The oil cylinder is not tightened.
Replace the seal.
The single valve leaks.
Clean or replace it.
The overflow valve leaks.
Clean or replace it.
Electrical unloading valve leaks.
Clean or replace it.
Raising too slow
The oil fileter is jammed.
Clean or replace it.
Oil level is too low.
Add oil.
The overflow valve is not adjusted to the
right position.
Adjust it.
The hydraulic oil is too hot (above 45°).
Change the oil.
The seal of the cylinder is abraded.
Replace the seal.
Lowering too slow
The throttle valve jammed.
Clean or replace.
The hydraulic oil is dirty.
Change the oil.
The anti-surge valve jammed.
Clean it.
The oil hose jammed.
Replace it.
