Underground Scissor Lift QJY3.2-1
13
9
Troubleshooting
Failure
Cause
Solution
Engine
doesn’t
rotate
□ Bad contact of wires
Check and joint the wires
□ contact device doesn’t work
Check or change contact device
□ bad action of limited switch
Adjust or change limited switch
Engine rotates but
not ascend
□ have dust in the center of the
electromagnetism valve
Check
the electromagnetism valve and
clean it
□ the line pole is loose
Fix it
□ falling short of hydraulic oil
Makeup hydraulic oil
The ascend speed
is slow
The oil seal hole is leak
Change the oil seal
Shake
in
the
running
Air in the hydraulic pressure loop
Release the air by redo the ascend
and decent
Air leak at the top connect oil tube
mouth of the pump
Check the seal of the oil tube mouth
Filtrate net is jam
Clean it
Only ascend ,can
not descend
□ electromagnetic damage
Check it and mend it
□ connect invalidation in the button
Check the button
□ electromagnetic valve blocked
Check or change electromagnetic
valve
□ descending
electromagnetic valve unopened
Check or change electromagnetic
valve
□ hydraulic oil too dense (in winter)
Add oil according to the manual
Oil leak
Loose tie-in
Screw the tie-in
Mangled oil seal on tie-in
Change oil seal
