6 - MAINTENANCE
6.2 LATERAL TRANSMISSION
The transmission of the driving motion to the rotor occurs through belts with adjustable pulleys.
In order to prevent the belts from slipping or from malfunctioning, check the tension of the transmission belts.
Tensioning the transmission belts
In order to do this, make sure that the engine is switched off:
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Remove the screws holding the protecting cover in place and remove it by pulling it ;
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In order to check the tension, press on the belt in its central area between the two pulleys with a force of 6 Kg. so
as to create a 1 cm. depression on each single belt
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Unscrew the screws holding the gearbox to the frame of the machine;
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Act on the two adjustment screws until the belts have reached the correct tension;
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When the belts have been tensioned correctly check the alignment of the pulleys;
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Tighten all the screws which have been loosened;
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Replace the cover of the belt housing .
The belts must be checked regularly after the first 2 hours of work and, after that, every 8 working hours, in order to
prevent the belts from slipping too much. If they do, the fact becomes noticeable because of the smoke coming out of
the belt housing. In this case it is necessary to replace all of the belts, so as to guarantee the correct tension and a
uniform distribution of the forces, even if a single belt is damaged.
Loosen the screws A and B (see picture) increase or decrease the tension of the belts by acting on the screws C and
E.
Try and keep shaft D always in a horizontal position.
While tensioning the belts pay the utmost attention to the planarity of the pulleys.
Press on the belt in the middle between the two pulleys with a force of 6 Kg., in order to produce a deformation of 1
cm. on each single belt.
It is advisable to use a metal ruler of adequate length which, when resting on the edges of the two pulleys touches the
4 edges.
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