Lukas LKS 55 EN - Manual (Page 11)

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and load test. For this purpose, LUKAS offers a test kit as appropriate equipment.
13.2.4 Change of hydraulic oil
- after 200 uses, latest after 2 years, the hydraulic oil has to be changed.
- in any case if the oil of the pump (motor / hand pump) which belongs to the unit is changed.
By changing the used oil, it should be avoided that the new oil is polluted by the used oil of the
rescue tool.
Procedure:
The rescue tool is in closed (retracted) position • Change of oil has to be effected at the pump.
Screw off the return hose at the pump:
- in case of hose connection: screw off the connecting piece of the blue return hose.
- in case of quick connect couplings: screw off totally the coupling nut of the quick
connect coupling of the blue return hose.
Extend pump with tool slowly • Collect the used oil at the piston rod side in a separate tank and
dispose of the used oil (as the used oil of the pump) • Do not operate the pump any longer.
Connect the return hose again to the pump:
- Tighten the coupling nut of the quick connect coupling according to 13.3.6,
- Screw the hose nipple into the valve bloc with MA = 45 Nm,
- Ventilate the tool according to 9.1.1.
13.3 Repairs
13.3.1 Cutter blades / blade arms and levers
Cutter blades, blade arms and levers have to be replaced in the case of visual heavy damge and
cracks or when the blades are becoming too weak due to frequent regrinding. (13.2.1)
- Unscrew the nut of the central bolt (size open-jawed
spanner see 15.2) and drive out the central bolt.
- Remove the retaining rings with a pair of Seeger
ring pliers.
- Replace the blade arms after thorough cleaning and
greasing of the sliding surfaces.
- Tighten the nut of the central bolt with the tightening
torque specified in 15.2
- Note:
The bolts are accessible with the blade arms closed.
Attention: prior to mounting all sliding surfaces have to be carefully cleaned and greased with
LUKAS special grease.
Remark: Faulty parts such as blades, bolts or sliding disks have to be changed pairwise. The levers
have to be replaced if e.g. during change of blades damages appear such as wear on the surface,
cracks or deformation of the bores. Lever exchange should be made by a authorized LUKAS dealer
or the LUKAS service department.
13.3.2 Oil spill out of the control valve handle (see cover page item 7)
Pressure or return hose are not tightened properly.
Procedure:
Loosen the 2 allen screws (SW5) inside the handle sleeve and remove them together with the short
plastic isolation sleeves. Pull handle sleeve backwards until the hose connection points become
visible and retighten the retaining nut. Change hose connection sealing rings if necessary. Place
handle sleeve again and tighten it with the 2 allen screws. Make sure that the plastic isolation
sleeves are placed properly on the allen screws before mounting.