58
M1.1.SL300U-SL300UM.NLFREN 28082018
EN
Failure phenomena
Cause
Resolution
In lifting operation, the
motor runs, but there is no
lifting movement.
The motor turns reverse.
Change the phases of the power supply wires.
Lifting with light load is normal but no lifting
with heavy load.
Lift is overloaded and is unable to carry the load
being attempted. Carefully lower and remove
vehicle from lift.
The spool of the lowering solenoid valve is stuck
by dirt.
Clean the spool.
The amount of hydraulic oil is not enough.
Add hydraulic oil.
The “operation stop valve” is not closed.
Screw down the “Operation stop valve”.
When press “DOWN”
button, the machine is not
lowered.
The safety pawl are not released form the
safety teeth.
First lift a little and then lowering.
The safety pawl is not lifted.
The air pressure is not enough, the safety pawl
is stuck or the gas pipe is broken off, adjust
pressure, check the gas pipe and replace 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 “antiknock valve”.
The machine lowers
extremely slowly under
normal loads.
The hydraulic oil has too high viscosity or
frozen, deteriorated (in
Winter).
Replace with hydraulic oil in accordance with the
instruction 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.
Remove the “antiknock valve” from the oil supply
hole at the bottom of the oil cylinder, and clean
the “antiknock valve”.
The right and left platforms
are not synchronous and
not in the same height.
The air in the oil cylinder is not vent
completely.
Refer to “ Oil Make-up „Adjust operation”.
Oil leakage on oil pipe or at its connections. Tighten oil pipe connections or replace oil seals
and then make-up oil and adjust levelness.
The “oil make-up stop valve” can not be
closed tightly and almost make-up oil and
adjust every day.
Replace oil make-up stop valve, and then make-
up oil and adjust.
Noisy lifting and lowering. Lubrication is not enough.
Lubricate all hinges and motion parts (including
piston rod) with machine oil
The base or the machine is twisted.
Adjust again the levelness of the machine, and
fill or pad the base.
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