Singer 331K4 - Centralizing Feed Dog in Slots; Shuttle Race Removal and Replacement

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
fig.
36. Centralizing Feed Dog
AT
HIGHEST
POINT
Fig.
37.
Shuttle Race
16
s
TO
CENTRALIZE
FEED
DOG IN THROAT
PLATE
SLOTS
CHECK:
Feed
dog
should not contact
edges
of
throat
plate
slots.
SIDEWISE
SETTING:
Feed
dog
should travel on a line midway between
sides
of
throat
plate
slots. ·
Feed
dog
can
be
moved toward left
or
right,
as
required,
after
loosening two nuts S
and
screw
U,
fig.
36,
on screw centres
T.
To
move
feed
dog
toward left, loosen screw centre
T
at
left end
of
shaft
V,
as
required,
and
tighten the
other screw centre
an
equal
amount.
Make certain
that
screw centres hold
feed
rock shaft
V
snugly
in
place without binding.
Then
securely tighten
both nuts S
and
screw
U.
LENGTHWISE
SETTING:
Set
machine for longest stitch
as
instructed on
page
10.
Feed dog should
be
set so
that
its movement
is
equidistant from front
and
rear
edges
of
throat
plate
slots.
Loosen clamping screw
U
and
move
feed
bar
R
and
rock shaft
V,
as
required.
Securely tighten screw
U.
TO
REMOVE
AND
REPLACE
THE
SHUTTLE
RACE
REMOVAL (With needle
at
highest position):
Remove the two screws
W,
fig.
37.
Remove the shuttle
race
X,
Fig.
37,
from machine.
Shuttle
Y
may now
be
slipped
in
or
out
of
shuttle
race
X without difficulty.
REPLACEMENT
(With needle
at
highest position):
Slip shuttle
Y
into shuttle
race
X,
Fig.
37.
Turn
shuttle
in
shuttle
race
so
that
shuttle
will
correctly
engage
shuttle driver
Z,
fig.
37.
Install shuttle
race
with shuttle
in
machine.
Fasten with two screws
W,
fig.
37.
Tighten two screws
W.