7
Power switched on,
but power
indicator light off
Loose wire connection, bad switch
contact, results in current
interruption
Check battery wire
connection,
fasten screw on all
connection joints,
keep switch contact smooth
Unstable lifting and
lowering rate Air inside cylinder
Get rid of the air in the cylinder
by fully lifting and lowering
2-3 times.
No Lifting
Lack of hydraulic oil Fill in hydraulic oil
Low battery Recharge the battery
Hydraulic oil leak
Inspection and repair,
changing cylinder seals,
fasten screws of the oil tube
joint.
Over load
Lifting load not allowed to
exceed truck capacity
Abnormal noise from
power system during
lifting & lowering
Lack of hydraulic oil or oil is dirty
Fill in enough hydraulic oil.
Replace dirty hydraulic oil
with clean oil
Noise from scraping between
motor and loosened motor cover
Tighten the fixed screws
Humid environment Ambient humidity 90%
≤
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