CLAS PE 6004, Manual

Page: 44 / 56

PE 6001
DOUBLE SCISSOR LIFT 3T
PE 6004
DOUBLE SCISSOR LIFT DUAL CYLINDER 3.5T
44
Maintenance work is only permissible for trained personnel with appropriate skills.
All pins and upper and lower sliding blocks in the lifter must be lubricated regularly.
Hydraulic oil should be replaced once a year.
The oil level must always reach at least the upper limit indicated.
When replacing the oil, make it sure that the lifting platforma are always in the close posi-
tion, so proceed to the extraction of the old oil.
The lift maintenance technician must check that the pneumatic safety valve is reliable and
in operation.
Symptom
The engine does not
work
If the engine works by forcing the contactor with an
isolation rod, replace the contactor.
Connect the power cable to the power socket.
Modify the phases of the power cables
Connect a bridge to terminals 100 and 102 of the electrical
circuit. If the problem is solved, check every end strokes
and their cables. In case of damage replace them.
Check the plug and spool of the drop valve, check the
correct nut seal. Should it be replaced
The pressure of the overflow valve can be increased
by turning the right knob slightly. The solenoid coil is
defective and should be replaced
Remove the parachute valve from the oil supply hole at
the bottom of the cylinder and clean the device.
Replace the oil with an oil conforming to the operating
manual.
Refer to page 17 «Oil Pressure Adjustment».
Check the sealing of the hydraulic circuit, then adjust
the pressure and the level of the oil.
Lubricate all pins and sliding parts (including piston
rod) with mechanical oil.
Adjust the leveling of the floor to properly adhere the
lift to the floor.
Remove the parachute valve from the oil supply hole
at the bottom of the oil cylinder and clean the device
or replace
Add hydraulic oil.
The power cable is not plugged in by the
power outlet.
The AC contactor does not work.
The limit switch is not closed.
The motor turns reverse.
Lifting with light load works
normally but not with heavy load.
The hydraulic oil has a high viscosity, is
deteriorated or frozen (in Winter).
The air in the hydraulic circuit has not
been completely removed.
Oil leakages along the oil pipe or one of
its joints.
The lubricant is not enough.
The floor is not well leveled or the base of
the lift does not adhere well to the floor.
The “antiknock valve”, inside the
cylinders, is blocked.
The amount of hydraulic oil is not enough.
The descent valve is activated but does
not work.
The Parachute valve is blocked.
In lifting
operation, the motor
runs, but there is no
lifting
movement
The lift lowers very slowly
when subjected
to weight loads in the
standard range.
Platform P1 and P2 are
misaligned
Noisy lifting and
lowering movements
Cause Resolution
CARE & MAINTENANCE
TROUBLESHOOTING