Superabrasive
User
Manual
Original
Language
Lavina®
20N
‐
S/
Lavina®
20N
‐
S
‐
HV
8/2014
19
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
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
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).
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).
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).
Figure 9.5.10
Figure 9.6.1
Figure 9.6.3
Figure 9.6.2
Figure 9.6.4
Figure 9.6.6
Figure 9.6.5
Figure 9.6.7
Figure 9.6.9
Figure 9.6.8
