Superabrasive LAVINA ELITE 3213EHV, Руководство пользователя

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Superabrasive
Owner’s Manual Original Language – Lavina
®
3213E/3213EHV 2/2020
29
8.11TENSIONING AND REPLACING THE TRANSMISSION BELT
The transmission
of the machine
has
one
maintenance-free
timing
belt. To
change the belt,
remove all holders
and dismount their
adaptors.
Dismount
the
sealing. Carefully
check the friction
surface (flanges of
the lower cover
and the outside
diameter of the
adaptors). Decide
if they are in good
condition
(wear,
smoothness of
surface) and
whether they can
work
until next
inspection.
Remove
the
bottom cover by
unscrewing the bolts around the edge and the three bolts of the spacers.
(Fig.8.11.2). Under the cover there is a sealer around the edge, and the
spacers have O-Rings. It is recommended to change all seals with the belts.
Fig.8.11.1 shows the scheme of the belt location. To mount the new belt, first
unscrew the nuts at pos.8(Fig.8.11.5), pos.9(Fig.8.11.3) and the six bolts at
pos.6(Fig.8.11.4) enough to be able to turn the tensioner around the central
axle. Clean the washers and surrounding area, and check if all bearings of
pulley units and tensioners are in good condition (check for too much
clearance or rolling noise). Rotating the tensioner will allow the centre
distance to be reduced so the timing belt may be fitted without force.
Put the belts in pos.11 as per the scheme, and pay attention to their correct
orientation at each pulley. Ensure that you have loosened the nuts at pos.8
and the six bolts at pos.6, allowing the tensioner to rotate with minimal force.
Using the nuts at pos.9, tighten the belt, and verify again the correct position
of the belt and the correct gearing in every pulley. Rotate the gear while
tensioning to allow for a regular tension distribution along the belt. Control the
tension using Frequency tension Tester Optibelt 3 TT(Fig.8.11.6).
The tension in the span
А(Fig.8.11.6) of the belt should be
123-130Hz.
It is possible to use the pre-installed supports (Fig. 8.11-12)(Fig. 8.11.7) as
references to stop the tensioner at the desired belt tension, provided that the
supports have not been moved from their factory position.
NEVER “OVER” TENSION THE BELT, THE BELT WILL BE DESTROYED
AND IT WILL NEVER RECOVER ITS ORIGINAL TENSION
Figure 8.11.5
Figure 8.11.6
Figure 8.11.7
Figure 8.11.2
Figure 8.11.3
Figure 8.11.4
Figure 8.11.1