centauro SP 400, Use And Maintenance Manual, Page: 18 / 50

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16.1.3. Flywheel ring seal replacement
On some types of machine the seal covering the outer face of the flywheels (at the part in contact with the blade) is
composed of a closed ring in a special material that requires no gluing. If the machine is always kept correctly registered,
the wear on this seal is virtually null, so its service-life is virtually unlimited.
It may however get damaged, for example by accidental breakage of a blade, or when
its teeth rest stably on the seal.
If for any reason it is necessary to replace it, it is necessary to comply with these
instructions:
•
The seal has a reference tooth which must be housed in the special ring groove on
the face of the flywheel. This groove is not symmetric, but shifted forwards. It is
therefore necessary to position the seal in the right sense (see figure to side).
• To facilitate assembly, we advise heating the seal in water at a temperature of
70-80°C for a time of 3/4 minutes. On completing assembly, wait for it to cool down
completely before proceeding.
• Clean and face the convex surface carefully with course grain sandpaper and trim the
edges to the edge of the metal face with a cutting blade. The ring seal already has
the correct convexity.
16.1.4. Flywheel bearing replacement
When the bearings, after having worked for a reasonable period of
time, have to be replaced, a face of the upper flywheel will have to be
previously marked so it can be refitted properly.
Both flywheels will then have to be removed. The upper flywheel can
be taken directly off its shaft; for the lower flywheel, see paragraph
16.1.1. “Belt replacement”. If the shaft is hard to remove, use an
extractor.
Remove all the retaining rings and then the bearings with relevant
spacer. These bearings are of the sealed type and consequently,
when refitting the new ones of the same type, no grease need be
applied.
Working in the opposite sequence, refit the unit, being careful not to
knock directly on the bearings with the hammer - protect these first
with soft material (wood, plastic, aluminium, etc.).
Note: If you have not marked the outer face of the top flywheel, you
can make reference to the screws locking the balancing
counterweights: the side of the flywheel with the head of the
above mentioned screws will be fitted on the outside.
Fig. 16-1 R e f e r e n c e
tooth
Fig. 16-2 Spacer