Superabrasive Owner’s Manual orginal language –
Lavina 20®N Pro/20®NHV Pro
2/2012
16
REPLACEMENT OF THE PULLEY UNITS
Set the bottom cover assembly aside (Fig.8.21).Remove the O-rings to avoid to loose them
(Fig.22), remove the belt by turning the pulleys by hand, while pushing the belt off. (Fig.23)
Roll the units to ensure that the bearings are working properly. (Fig. 8.24) Units, whose
bearings are worn out or do not turn with ease should be replaced.
First, unscrew the nut, which is holding the pulley unit (Fig.8.25, Fig.8.26) When released, pull out the whole unit.
Carefully pull out the unit with crowbars, but do not use excessive force.
MOUNTING THE BELT WITH PINS
Bolt on two pins according to the picture (Fig. 8.27). Slide over the belt-replacing tool, in down position (Fig. 8.28). Lay
the belt with only ½ of its width showing over the pulleys (Fig. 8.29), and slowly begin to turn the belt replacing tool and
the pulleys. Keep turning until the belt is on the pulleys (Fig. 8.30). Only putting ½ of the belt width is very important
otherwise if the belt is initially mounted complete over the pulleys, it will be “over” tensioned and destroyed.
ATTENTION: NEVER “OVER” TENSION THE BELT, THE BELT
WILL BE DAMAGED AND IT WILL NEVER RECOVER ITS
ORIGINAL TENSION
Apply the seal ring in the channel of the aluminum cover and close the machine.
Reassemble in the same manner. Do not forget to put back or replace the “O” ring
(see Fig. 8.31).
Your Lavina20®N Pro/20®NHV Pro is now ready for use!
Figure 8.25
Figure 8.26
Figure 8.21
Figure 8.22
Figure 8.23
Figure 8.24
Figure 8.31
Figure 8.27
Figure 8.28
Figure 8.29
Figure 8.30
