Quick 42
Car-O-Liner Group AB
40724, EN - rev. 8, 2017-09
83
The motor runs, but the
lift cannot be raised
8. Defective relief valve
Connect a pressure gauge to the hydraulic hose and
check the pressure (should be 30 Mpa)
.
Pressure is set
at the factory; if the pressure is incorrect, contact your
supplier.
9. Defective pump
Replace the pump unit.
7.3
Problem: The lift drops
Fault
Possible cause
Solution
Lowering valve leaks
Dirt in the lowering valves. SDV1 or SCV1 Lower the lift and dismantle the lowering
valve.
Blow out the valve or replace.
Change the oil.
Oil leakage
Leakage from the hose or coupling.
Check hoses and couplings for leakage.
Replace defective components.
Oil leakage in the cylinder
Worn gaskets.
Dismantle the cylinder and change
gaskets. Change the oil.
Non-return valve in the pump defective or
leaking
Non-return valve defective.
Replace the non-return valve.
7.4
Problem: The lift cannot be lowered
Fault
Possible cause
Solution
Lowering valve fails to open.
Cable to the hand control damaged.
Check the cable to the hand control.
Change or repair.
No current to the magnetic coil.
Check the voltage on the coils,
SDV 1 and 2 18V DC during load
SCV 1 and 2 22V AC during load.
Trouble shoot according to the diagram.
The valve is blocked with dirt.
Clean the valve.
The valve sticks.
Change the valve and the oil.
The security latch is stiff or sticks.
Clean and lubricate so that the latch
enters the slot easily.
Security latch is jammed
Air cylinder does not lift the latch from the
slot.
Check the air supply to the air valve and
that the air valve receives 22 V AC. Make
sure that the air hose is not crushed or
blocked.
