21
Fault
Check
Cause
Solution
Cylinder ex
-
tends, but does
not maintain the
pressure
Check that all
connections are fully
tightened.
Leaky connection.
Tighten loose con
-
nection.
Check the cylinder
for leaks.
Leaking seals.
Have the leaks
repaired by an
authorised dealer, by
personnel specially
trained by LUKAS, or
by LUKAS itself.
Internal leakage of the
hand pump.
Have the hand
pump serviced by an
authorised dealer, by
personnel specially
trained by LUKAS or
by LUKAS directly.
Cylinder does
not retract, only
partially retracts
or retracts more
slowly than usual.
Check that the
pressure relief valve
on the hand pump is
fully open.
Pressure relief valve
on hand pump partly
closed.
Fully open the pres
-
sure relief valve on
the hand pump.
Check the hydrau
-
lic fluid level in the
pump supplying the
fluid.
Too much hydrau
-
lic fluid in the hand
pump.
Drain hydraulic fluid.
Check that all
couplings are fully
tightened.
Hydraulic coupling
loose.
Tighten hydraulic
coupling.
Air in hydraulic sys
-
tem.
Vent hydraulic sys
-
tem in accordance
with section 6.1.
Check the cylinder
for damage.
Cylinder return spring
is broken or other
damage is present on
the cylinder.
Have the damage
repaired by an
authorised dealer, by
personnel specially
trained by LUKAS,
or by LUKAS itself.
Device doesn’t
perform at its
given power.
Check the hydrau
-
lic fluid level in the
pump supplying the
fluid.
Insufficient hydrau
-
lic fluid in the hand
pump.
Top up hydraulic
fluid, de-aerate