Lukas Hydraulic cylinder - Manual (Page 27)

27
Piston on cylinder
(with Quick-
disconnect coupling
system) does not
retract
Quick stop
function on
cylinder effective
Extend the cylinder
piston a short
distance and then
retract the cylinder
piston slowly.
Cylinder defective Remove the cylinder
from service and
have it repaired or
repair it
Device does not
apply the specified
force
Hydraulic fluid
level in the
supplying pump?
Insufficient
hydraulic fluid in
the pump
Top up hydraulic fluid,
de-aerate
Check the
operating pressure
of the driving
hydraulic unit
Pressure of supply
too low
If possible, increase
the max. operating
pressure on the
hydraulic unit to
the max. operating
pressure of the
cylinder or use a
different hydraulic
unit with adequate
max. operating
pressure.
Cylinder defective Remove the cylinder
from service and
have it repaired or
repair it
Hose assembly
cannot be coupled
Pressurised Set hydraulic pump
to pressureless
circulation
Coupling defective Coupling needs to be
replaced immediately
Hydraulic fluid leak
on the hoses or the
connections
Are the hoses
defective?
Leakage, possible
damage
Replace hoses.
Damage to the
surface of the
hydraulic hoses
Mechanical
damage or contact
with aggressive
agents
Replace hoses.
Hydraulic fluid leaks
on the piston rod
Defective rod seal Repair of fault by
authorised dealer,
specially trained
LUKAS staff or
directly by LUKAS
Damage to the
piston
Trouble Check Cause Solution