Lukas LSI 400 - Manual (Page 15)

15
2.2.2 Main checks
The mechanical transfer elements on the device are subject to very high
mechanical stresses and therefore they must be checked after 500 operating
hours at latest. Thereby, appearances of attrition can be detected early so that
breakages can be avoided by timely replacement of these worn parts.
Perfect parts can be reassembled after careful lubrication with LUKAS special
grease.
Parts with limited wear (fretting marks) can be refurbished by polishing and reassembled
after careful lubrication with the corresponding grease.
If there are heavier traces of wear, the damaged parts must be replaced (in pairs).
At these intervals, it is essential to check the blades for crack. A special crack test
kit is available.
From time to time the cutter must be cleaned and lubricated with oil to protect it
against external corrosion.
12.2.3 Function and load test
If there are doubts about the safety and reliability, an additional function and load
test must be carried out. For that purpose LUKAS offers a test equipment.
12.2.4 Changing the hydraulic oil
- Change the hydraulic oil after approx. 500 operating hours, but after 2 yeas at latest;
- Whenever the oil of the appropriated pump (motor / hand pump) is changed. Mixing
the cutters used oil with fresh oil must be avoided because of impurity.
Procedure
The cutter is in closed (retracted) position • Change oil of the pump. Unscrew return hose
on the pump:
- for hose connection: unscrew the connector from the blue return line;
- for quick couplings: Fully release the union nut on the plug-in coupling of the blue
return line.
Slowly extend the device with the pump. Collect the old oil from the annulus side in a
separate container and dispose it like the old oil from the pump • Actuate the pump no
longer.
Reconnect the return hose to the pump:
- Tighten the union nut on the plug-in coupling according to 12.3.6,
- Tighten hose nipple in the valve block with M
A
= 45 Nm,
- Ventilate device according to 9.1
12.3 Repairs
12.3.1 Blades / blade arm and levers
Blades / blade arm and levers must be replaced if there are breakages and cracks or
if the blades are no longer in order as a result of multiple regrinding of the cutting edges
(12.2.1).
- Unscrew the nut from the central bolt
(wrench size of the jaw wrench see chapter
"Technical data") and remove the central bolt,
- Remove the retaining ring with retaining ring
nipper,
- Replace the blades and sliding plates,
- Insert bolts with retaining rings,
- Tighten the nut on the central bolt with torque
according to chapter „Technical data“.
Note: The bolts are accessible, when the blades are closed.
bolt
central bolt
blade arm
retaining ring
sliding plate
self-locking nut