Lukas LS530EN - Manual (Page 12)

12
Parts with insignificant wear (fretting marks) can be repaired by polishing and fitted
again after greasing.
More pronounced wear marks require replacement of the damaged parts (by pairs).
At these intervals, crack testing of the cutter blades is equally mandatory. For this
purpose, a special crack test kit is available.
To protect the device against external corrosion clean its surface from time to time and
slightly grease it with oil.
13.2.3 Function and load test
If there is any doubt as to the safety and reliability of the equpiment, carry out an additional
function 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 M
A
= 45 Nm,
- Ventilate the tool according to 9.1.1.
13.3 Repairs
13.3.1 Cutter blades and levers
Cutter blades 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.