TROUBLESHOOTING
OBSERVED SYMPTOM TROUBLESHOOTING
Observed failure
No power
Lift speed not uniform
No lift
Abnormal noise during
lifting
Possible cause
Loose terminal or bad
switch connection causes
interrupted current
Air in the hydraulic cylinder
Hydraulic oil is low
Low battery
Oil leaking
Overload
Lift limit switch failure
Hydraulic assembly is
loose
Hydraulic motor or gear
pump failure
Maintenance / Battery
Solution
Check battery and wire
harness terminals, tighten
screw connections, and
keep switch contacts clear
Bleed air from cylinder
as described in cylinder
replacement procedure
Fill with hydraulic oil
L-HV32
Recharge battery
Inspect and repair
hydraulic system, replace
seal kit, or tighten oil pile
connection screws
Reduce the load weight
Repair the limit switch
Tighten the retaining screw
Inspect hydraulic motor
and gear pump
Use and maintenance manual - EN87
EN