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