14 troubleshooting – Lukas LKS 55 EN User Manual
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13.3.3 Change of protection boot
The rubber protection boot shall protect the operator against injuries caused by the moving levers.
If the boot is damaged it has to be replaced.
Procedure:
Remove the carrying handle (held by 2 screws) • Dismount cutter blades / blade arms (see 13.3.1)
• pull the faulty boot from the cylinder body and place the new one properly, i.e. that the carrying
handle fixing screws go easily through the corresponding holes in the boot. Mount and tighten
carrying handle.
13.3.4 Carrying handle (see cover page item 6)
Damaged carrying handles have to be replaced immediately.
Procedure:
Remove the handle (held by 2 screws) and change it against a new one • Change screws and disks
if necessary.
13.3.5 Labels
All damaged or illegible indentification stickers (Safety instructions, type label a.s.o) have to be
replaced.
Procedure:
Remove damaged stickers and clean surface with acetone • Put on new stickers.
13.3.6 Quick couplers
Quick couplers on the 0,5m hoses have to be replaced when
- external damage can be observed • the locking sleeve doesn´work any more • oil spill occurs
even when the coupling is properly connected
Remark: Faulty couplers have to be changed completely against genuine LUKAS spares, i.e. it is
not permissible to make any repair work.
The retaining nut on the hoses has to be tightened with a torque of M
A
= 45 Nm.
14 Troubleshooting
If the defects cannot be repaired, contact an authorised LUKAS dealer or the LUKAS service
department. The address: LUKAS Hydraulik GmbH, Weinstraße 39, D-91058 Erlangen, Pf 2560,
D-91013 Erlangen, service phone 09131/698 348; fax 09131/698 353
Trouble
Check
Cause
Remedy
Hoses cannot be
Pressurized
Relieve pump pressure
coupled
On actuating blades
Hoses correctly
Air in the hydraulic
Thoroughly vent pump
move slowly or by
connected power
system
unit: see 9.1.1
jerks
pack operating
No pressure build-up
Not enough oil in hand Refill oil and vent the
resp. motor pump.
system (see operating
instruction 9.1.1)
Star grip doesn't return
Return spring is
Ask authorized dealer or
to middle position when
damaged or return
LUKAS themselves
released
mechanism is dirty
for repair
Oil leakage out of
Untightness, eventually Replace hoses
hoses or hose fittings
damages
Surface of hydraulic
Contact with
Change hoses
hoses is dissolved
agressive fluids
Blades spread up at
Torque of the center
For retightening, see
tips to a gap of more
bolt nut is unsuffisient
13.2.1
than 3 mm even if not
fully loaded
Leakages on the
Seal defective piston
Replacement of seals
piston rod
rod
by authorized dealer or
LUKAS themselves