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required.
4） Check the jack frequently. If the top end of the piston rod, transverse shafts, universal joints, rollers, casters or other rotating parts
lack lubrication（i.e. grease）, please add grease immediately.
5） Replace the hydraulic oil at least once every 3 years. The hydraulic oil replacement procedure is as follows:
a）Lower the jack to the lowest level and release and remove the oil filler screw.
b）Overturn the jack and drain out all the hydraulic oil（hydraulic oil shall be disposed of according to the local laws and
regulations）.
c）Place the jack upwards, align it with the oil filler and slowly fill qualified hydraulic oil until it is 0.6 cm from the oil filler.
d）Rotate the handle counterclockwise and open the oil return valve.
e）Rotate the handle clockwise, lift and press it, and repeat this operation several times quickly to discharge air from the oil circuit.
f）Recheck the oil level and refill the oil if necessary.
g）Tighten the oil filler screw.
h）Wipe it off with a piece of clean cloth, then place the jack in a safe place.
V. Common faults and troubleshooting :
The jack fails to rise under
rated load
The tray lowers automatically
under load
The jack fails to rise
Fault
The rolling handle feels soft
symptoms
and weak
The handle tilts automatically
under load
Leakage at the oil filler
Possible cause
（s）
97822
√
√
1. Check whether
the oil return valve
is completely
closed;
2. There may be
air in the oil circuit
中文
EN
√
√
√
√
√
√
1. The oil circuit
may be blocked;
The amount of
2. The oil return
hydraulic oil may
valve is not
be insufficient
completely closed
DE
RU
KO
PT
JA
√
√
√
amount of
There may be air
hydraulic
in the oil circuit
oil may be
excessive
ES
√
The
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