Replacing Pulley Units - lavina 20-S User Manual

Superabrasive
Figure 9.5.10
Figure 9.5.10
the belt around the driving pulley (Fig. 9.5.6). Begin to tension until the measure of 10 cm between the marks becomes 10.2 cm
(Fig. 9.5.7) (Fig. 9.5.8). Tighten the tensioning device while turning the bolt move the planetary head so the belt can slide. (Fig.
9.5.8). Do not forget to lock the tensioning device (Fig.9.5.9).
9.6 REPLACING PULLEY UNITS
Figure 9.6.1
See previous chapters to take of the tool holders and top cover. Unscrew the screws of the bottom cover (Fig. 9.6.1).
Set the bottom cover assembly aside (Fig.9.6.2).Remove the O‐rings to avoid losing them (Fig.9.6.3).
Figure 9.6.4
Only the two loose (non‐driving) pulleys can be remove without removing on top the motor base disc and motor. Loose the nu t on
top of the pulley (Fig.9.6.4). Carefully pull out the unit with crowbars, but do not use excessive force (Fig.9.6.5) (Fig.9.6.6).
Figure 9.6.7
If all the pulley units have to be replaced, dismount motor base disc and motor. Before removing the belt unscrew the central
pulley (so it does not turn while unlocking) (Fig.9.6.7) (Fig.9.6.8). Pull the central pulley off (Fig.9.6.9).
User Manual
Completely dismount the tensioning device (Fig. 9.5.1). Make 2 signs on the dismounted belt
exactly 10 cm out of each other (belt without tension) (Fig. 9.5.2). The purpose is to measure 10.2
cm on the belt in tension what is a tension of 2%., a maximum of 2.5% is allowed.
ATTENTION: NEVER "OVER" TENSION THE BELT, THE BELT WILL BE DAMAGED AND IT WILL
NEVER RECOVER ITS ORIGINAL TENSION
Mount the belt back around the planetary pulley; see that the belt is behind the driving pulley
(Fig. 9.5.3). Put the belt around the left roller of the tensioning device (Fig. 9.5.4). Put the
tensioning device back in place and pull the belt from the roller on the right side (Fig. 9.5.5). Put
Figure 9.6.2
Figure 9.6.5
Figure 9.6.8
Original Language
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Lavina® 20‐S
Figure 9.6.3
Figure 9.6.6
Figure 9.6.9
6/2013