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中文
EN
DE RU KO PT
JA
ES
97820
15
Chapter V Common faults and troubleshooting
Fault
symptoms
U n a b l e t o j a c k
under rated load
√
√
√
√
The tray drops
automatically under
load
√
√
The tray always fails
to lift
√
√
The handle is soft
and powerless
when pressed
√
√
The handle raises
automatically under
load
√
Oil leaks from the
oil filler
√
Possible
causes
1. Inspect if the
oil return valve
is completely
closed
2. Air may exist
in the oil circuit
1. Oil circuit may
be blocked
2. The oil return
valve may not be
completely
closed
The
hydraulic oil
may be
insufficient
Air may
exist in
the
oil circuit
The
hydraulic
oil may be
excessive
Recommended
solutions
1. Turn the handle
clockwise to the
end to close the
oil return valve
2. Discharge
air from the oil
circuit
1. Flush the oil
circuit:
a. Lower the jack
to the lowest
position, and
close the oil
return valve
b. Lift the tray
c. Release the
oil return valve
quickly and apply
force to return
the tray quickly
2. Turn the handle
clockwise to the
end to close the
oil return valve
Inspect the
hydraulic
oil level and
add oil if
necessary
Discharge
air from
the oil
circuit
Inspect the
hydraulic oil
level and
adjust it if
necessary
Summary of Contents for 97820
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