User Manual

35
11. Troubleshooting
Trouble Control Cause Solution
Spreader arms move
slowly or jerkily when
activated
Are the hoses
connected
properly?
Air in the hydraulic
system
Deaerate pump
system
Does the pump
unit work?
Device doesn’t
perform at its given
power
Check the
hydraulic fl uid level
in the supplying
pump
Insuffi cient
hydraulic fl uid in
the pump
Top up hydraulic fl uid,
deaerate
Following release,
the star grip doesn’t
return to the central
position
Cover damaged
or star grip hard to
move?
Damage to the
torsion spring for
reset
Repair by an
authorised dealer, by
personnel specially
trained by LUKAS, or
by LUKAS itself
Soiled valve or
star grip
Defective valve
Other mechanical
damage (e. g. star
grip)
with mono-coupling-
system: Hoses
cannot be coupled
Pressure too high
(e.g. caused by
too-high ambient
temperature)
Set hydraulic pump
to pressureless
circulation
Coupling defective Coupling needs to be
replaced immediately
with mono-
coupling-system:
It is frequently not
possible to couple
hose assemblies
Control the
degree of viscosity
and application
temperature of
the used hydraulic
fl uid
Hydraulic fl uid
not adapted to
the application
situation
Hydraulic fl uid
must be replaced
(see chapter
“Recommended
Hydraulic fl uids”)
Coupling defective Coupling needs to be
replaced immediately
with quick-
disconnect-coupling-
system: Hoses
cannot be coupled
Is the pump
working?
Pressurized Relieve pump
Coupling defective Coupling needs to be
replaced immediately
Hydraulic fl uid leak
on the hoses or the
fi xing-ins
Are the hoses
defective?
Leak, possible
damage
Replace hoses