LINCOS
®
AUTOMOTIVE TOOLS
24
SCISSOR VEHICLE LIFT STD-5335A
When press “Lower” button,
the machine is not lowered
The safety pawl are not
released form the safety
teeth.
The “antiknock valve” is
blocked.
The safety pawl is not lifted. The air pressure is not
enough, the safety pawl is
stuck or the air pipe is bro-
ken off, adjust pressure,
check the air pipe and re-
place it.
The solenoid air valve does
not work.
If the solenoid air valve is
energized, but does not open
the air loop, check or replace
the solenoid air valve.
The lowering solenoid valve
is energized but does not
work
Check the plug and coil of
the lowering solenoid valve
and check the right turn
tightness of its end copper
nut and so on.
The “antiknock valve” is
blocked.
Remove the “antiknock
valve” from the oil supply
hole at the bottom of the oil
cylinder, and clean the “anti-
knock valve”.
The machine lowers ex-
tremely slowly under
normal loads.
The hydraulic oil has too
high viscosity or frozen, de-
teriorated (in Winter).
Replace with hydraulic oil in
accordance with the instruc-
tion book.
The “antiknock valve” for
preventing oil pipe burst is
blocked.
Remove or close air supply
pipe and thus lock the safety
pawl of the machine without
lifting of the safety pawl. Re-
move the “antiknock valve”
from the oil supply hole at
the bottom of the oil cylin-
der, and clean the “antiknock
valve”.
Noisy lifting and lowering. Lubrication is not enough. Lubricate all hinges and mo-
tion parts (including piston
rod) with machine oil
The base or the machine is
twisted.
Adjust again the levelness of
the machine, and ll or pad
the base.
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