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WALLMEK
i Kungälv AB - Special tools for auto repairs
www.wallmek.se • [email protected] • Tel. +46(0)303 58580 • Bultgatan 18, 442 20 Kungälv, Sweden
Problem
Possible cause
Action
Cylinder:
The cylinder plunger
does not move
The pump’s return valve is open
Leaking couplings
Low oil level in the pump
Pump defective
Broken hose
Pump capacity too low
Plunger jammed
Leaking seals
The pump’s venting function is
blocked
Close the valve
Repair the leakage
Fill with hydraulic oil
Service the pump
Replace the hose
Use the intended pump. Check the
pressure. Service
Check external influence on the
hydraulic cylinder. Service
Replace the seals. Service
Open the vent screw/clean
Cylinder plunger
moves partially
Wrong oil
Low oil level in the pump
Plunger jammed
Coupling/nipple defective
Drain, clean and fill with new
hydraulic oil
Fill with hydraulic oil
Cylinder service
Replace the coupling/nipple
Cylinder plunger
moves jerkily
Air in the hydraulic system
Plunger jammed
Vent the system
Cylinder service
Cylinder plunger
moves, but with
little power
Cylinder seals leak
Pump defective
Leaking couplings
Replace the seals. Service
Service the pump
Repair the leakage
Cylinder does not
return
The pump’s return valve is closed
Ruptured hose
Open the return valve
Replace the hose
Dismantling:
Stand slides on the
floor
Slippery floor
Clean the floor
Disc under the
spring rusted away
Grip with the claws directly on the
spring
The car lifts
Too much force being used
Reduce the force. Do not compress
the spring more than necessary.
The spring slides
out of the grip when
loaded
Wrong size claw
Poor alignment
Change claw
Adjust the position of the claws
Spring fails
Defective spring
Always stand behind the spring
compressor when working
The claws are fitted
in the inner holes
Move the claws to the outer holes
In the event of functional disruption, check the following: