Chapter IV
Common faults and troubleshooting
No-load piston rod
cannot lift
The piston rod
under rated load
lifts too slowly or
cannot lift
The piston rod
under load lowers
automatically
The handle lever
Fault
is powerless when
symptoms
pressed
The handle lever
cannot be pressed
under load
Oil leakage at the
joint of oil pump
cylinder body
The handle
lever raises
automatically
under load
Possible
causes
Solutions
22
AE5861 / AE5862
Common faults and troubleshooting
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1. The oil drain
1. Insufficient
valve is not
hydraulic oil in
completely closed
pump body
2. There is air in
2. Insufficient
the pump body/oil
regulating
pipe
pressure
1. Turn the oil drain
1. Pull out the
valve clockwise
rubber plug, add
to lock it and
oil through the oil
then carry out
hole and the carry
corresponding
out bleeding.
operations again.
2. Undo the plug
screw and turn
the pressure
adjustment screw
clockwise. (Note:
2. Bleed the oil
Turn the pressure
circuit
adjustment screw
1/8 turn clockwise.
Do not perform
adjustment more
than one time)
EN
DE
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1. The oil drain
valve is not
completely closed
Waste in the pump
2. Oil leakage
body oil circuit
at the oil pipe/
cylinder joint
1. Turn the oil drain
valve clockwise
to lock it and
then carry out
corresponding
operations again.
Under load, carry
out lifting several
times and then
quickly release
2. Tighten the joint
the load. Wash the
nut clockwise; if it
waste out of the
is not tightened,
oil circuit
tighten the
cylinder joint/oil
pipe joint with a
wrench.
RU
KO
PT
JA
ES
√
The nut at the
connection
between the oil
pipe joint and the
cylinder joint is
not tightened.
Separate the oil
pipe joint from the
cylinder joint and
refit the tightening
nut