Lukas R 430 - Manual (Page 26)

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11. Troubleshooting
Trouble Control Cause Solution
Cylinder piston
moves slowly or
jerkily when activated Are the hoses
connected
properly? Air in the hydraulic
system Deaerate pump
system
Does the pump
unit work?
Equipment doesn’t
come up with the full
power. Have you checked
the hydraulic fl uid
level in the supply
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 Is it hard to move
the star grip? 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
Damages on the
surface of the
hydraulic hoses Mechanical
damages or
contact with
aggressive agents Replace hoses