BELT
SHIFTING
6.
Position
Shifter
Stud
(P)
for
machines
with
serial
numbers
30730
and
below, as follows:
For
05-0102 Endless Belts: The flat on Stud (P)
should face outward creating a space which allows extra
stop
bolt
travel
before
the
belt
shifts.
This
insures
that
the machine is locked in sewing position before belt
shifting
occurs.
For Leather Belts:
The
flat on Stud (P) should face
down. In this case, belt shifting conditions remain
the
same
as
with
the
former
shifter
stud.
7. When positioning
the
Belt
Shifter
for
05-0102
Endless Belts,
the
inside or round surface of Stud (P)
should
be
in
contact
with
the
inside
surface
of
Actuator
(Q).
8. Start machine and shut off motor. Position Spring
Clip (R) for the lightest spring tension that will prevent
low prong of the belt shifter from rubbing the belt In
this position. Then check at the start of a cycle to see
that the belt does not shift before the Stop Bolt is
latched. If the belt shifts before the machine latches,
either
the
Spring is
too
tight,
or
the
Belt
Shifter
is
positioned
incorrectly.
Test Belt Shifting action as follows: Depress Starting
Pedal slowly until machine latches in sewing position
with
the
Stop
Bolt fully
out
of
the
recess in
cutting
cam
as
shown
in
detail
view.
At
this
time
the
belt
should
remain on
the
Idler Pulley
with
the
right prong
of
belt
shifter barely
contacting
the
belt.
Further
depression of
the
starting
pedal
will
shift
the
belt
onto
the
drive
pulley. If
the
belt
shifts before
the
stop
bolt
is
out
of
the
recess in
the
cutting
cam,
the
drive
pulley
is
not
free
to
turn
and
the
belt
wilt
be
subjected
to
excess
wear.
When
the
machine reaches
the
end
of
its cycle,
the
belt
should
instantly
shift
from
the
drive
pulley
back
to
the
idler
pulley.
If
the
belt
does
not
shift
in
this
manner,
the
belt
shifter
should
be
readjusted
slightly
to
right
or
left
until
the
desired
action
is
obtained.
9. BELT SHIFTER ADJUSTMENT FOR S2 MACHINES {No. S2-30931 and up) USING 04-0102-1: See
page
22
for
Belt
and
Motor
Pulley
Relation
I*
Adjust
the
Shifter
Stud
(S2-53-N2)
so
that
flat oreo
faces
down.
If
stud
is of
the
round type, there is no ad
justment.
2*
Make
sure
that
Idle
Pulley
and
Drive
Pulleyare
concen
trically
aligned.
Maintain reasorrably tight belt tension.
3 1I I
•!
, Withmachine In stop posi-
tion,
set inside prong of Belt
Shifter approximately 1/16"
oway from the belt as shown.
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