Jema Autolifte JA4000FP, Installtion, Operation And Maintenance Instructions

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5. Trouble Shooting
ATTENTION: If the trouble could not be fixed by yourself, please do not hesitate to contact us for help .We will offer our service at
the earliest time we can. By the way, your troubles will be judged and solved much faster if you could provide us more details or
pictures of the trouble.
TROUBLES CAUSE SOLUTION
Abnormal noise
Abrasion exists on insider surface of the
posts.
Grease the inside of the post.
Trash in the post. Clear the trash
Motor does not run and
will not rise
The wire connection is loose. Check and make a good connection.
The motor is blown. Replace it.
The limit switch is damaged or the wire
connection is loose.
Connect it or adjust or replace the limit
switch.
Motor runs but will not
rise
The motor run reversely. Check the wire connection.
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 adjusts 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.
Manual unloading valve or electrical unloading
valve leaks.
Clean or replace it.
Rising too slow
The oil filter 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.