Lukas MSM-2D mobile control module - Manual (Page 19)

19
Troubleshooting 10.
Trouble Check Cause Solution
Piston of the
hydraulic cylinder is
moving slowly or with
jerks
Hose lines
properly
connected?
Air in the hydraulic
system
Venting pump system
Pump unit
running?
System pressure
(high pressure) is not
reached:
Pump pumping
smoothly? Hose
lines connected?
Adjustment pressure
on the “pressure
relief valve for
extension” too
low due to setting
behaviour.
Have the adjustment
performed by an
authorised dealer or
directly by LUKAS.
Cylinder pistons
extend, but do not
retract
Pump pumping
smoothly?
Cylinder pistons
extending? Hose
lines properly
connected?
Adjustment pressure
on the “pressure
relief valve for
retraction” too low.
Have the adjustment
performed by an
authorised dealer or
directly by LUKAS.
Charge retaining
valve blocked
Repair by authorised
dealers or by LUKAS
directly!
Pistons of the
cylinders do not
extend or retract
Hose lines
properly
connected?
Control valve in
home position
(depressurised
circulation)
Turn the star grip of
the control valve into
the desired direction
of travel.
Control valve
defective
Repair by authorised
dealers or by LUKAS
directly!
The piston of a
cylinder is not
extending or
retracting
Hose lines
properly
connected?
Distribution valve
not set to the
corresponding
cylinder
Turn distribution
valve to control
the corresponding
cylinder.
In the case of a
monocoupling
system: Hose lines
cannot be connected
Coupling defective Coupling should be
replaced immediately
In the case of a
monocoupling
system: Hose lines
frequently cannot
be connected or are
difficult to connect
Check the
viscosity and the
use temperature of
the hydraulic fluid
used.
Hydraulic fluid
not suited to the
application
Hydraulic fluid needs
to be changed
(see the chapter
“Hydraulic fluid
recommendation” for
more information)
Coupling defective Coupling should be
replaced immediately