25
Superabrasive
User
Manual
Original
Language
Lavina®
20
‐
S
6/2013
Change
the
two
other
pulleys
as
earlier
described
in
the
chapter,
best
when
the
motor
base
disc
is
dismount
to
change
the
roller
units
too.
Unlock
the
nut
on
top
(Fig.9.6.25).
The
pulleys
can
be
released
with
two
crowbars;
do
not
use
excessive
force
(Fig.9.6.26)
(Fig.9.6.27).
9.7
MOUNTING
THE
BELT
The
mounting
of
the
belt
is
shown
on
Fig.
9.7.11.
Putting
the
belt
is
possible
when
the
tensioner
is
in
starting
position:
‐
loosen
the
nuts
pos.2
‐
loosen
enough
the
nuts
pos.3
(or
unscrew
them).
‐
unscrew
the
nut
(pos.4)
and
pull
out
the
bush
(pos.5)
from
hole
D
in
the
tensioner
(pos.1),
that
will
allow
the
tensioner
to
have
the
position
in
Fig.
9.7.11.
‐
put
the
belt
following
steps
shown
on
Fig.
9.7.2;
Fig.
9.7.3
and
Fig.
9.7.4.
(It
is
possible
also
to
put
the
belt
on
the
roller
unit
assembly
as
a
last
step.)
Check
if
the
belt
is
on
the
right
place
in
the
grooves
of
each
of
the
pulley
units
and
on
the
central
pulley.
Put
back
the
tensioner
in
a
position
the
axle
bushing
to
fit
in
the
tensioner
hole
(Fig.
9.7.5)
(You
can
push
down
the
bush
screwing
the
nut
pos.4)
Tighten
the
nuts
(pos.2,
Fig.
9.7.1)
on
the
sectors
and
unscrew
half
rev.
(
Fig.
9.7.5)
This
will
allow
the
tensioner
turn
in
minimum
clearance.
Fast
light
the
belt
(Fig.
9.7.7)
in
order
to
achieve
the
right
position
and
then
tighten
the
nut
in
the
center
of
the
tensioner
(
Fig.
9.7.6).
Fast
up
the
belt
taking
care
of
the
tensioning
(Fig.
9.7.7).
It
is
recommended
that
the
tensioning
of
the
belt
be
measured
with
Optikrik
II
Device
(Measuring
range:
500
‐
1400
N)
(Fig.
9.7.8)
.
For
a
new
belt
the
tensioning
force
is
650N,
and
the
fastening
force
is
520
N.
ATTENTION:
NEVER
“OVER”
TENSION
THE
BELT,
THE
BELT
WILL
BE
DAMAGED
AND
IT
WILL
NEVER
RECOVER
ITS
ORIGINAL
TENSION
Tighten
the
two
nuts
on
the
sectors
and
contra
nut
on
the
tensioner
(
Fig.
9.7.10).
Put
the
seal
ring
on
the
bottom
cover
and
close
the
machine
(
Fig.
9.7.11).
Reassemble
in
the
same
manner.
Your
Lavina®
S
machine
is
now
ready
for
use!
Figure 9.7.2
Figure 9.7.3
Figure 9.7.4
Figure 9.7.9
Figure 9.7.1
Figure 9.7.5
Figure 9.7.6
Figure 9.7.7
Figure 9.7.8
Figure 9.7.10
Figure 9.7.11
