12. To change iooper "B," Rgure No. I,
follow
instrucfions below very
carefully.
Machine
will
not
sew
or
chain
properly
unless
Iooper
is set exactly right and according to these instructions:
A. Unthread needle and remove presser foot, throat plate, and
feed
dog.
B.
C.
F.
Turn
machine
pulley
by hand
until
holes in main shaft cam and
feed dog carrier line up, see line A-A, Figure No. 5. Insert
wrenchNo. I-I47C and loosenIooper set screw.No. 1-152.
Pull
out old Iooper.
InsertnewIooper,withflat on
shank
upright, so that set
screw.
No.
1-152,
will
lock
on the flat and bring Iooper automatically
into time. Tighten set screw only slightly.
Turn
machine
pulley
about a
half
a turn.
This
will
bring
Iooper
and
needle
into
crossing
position.
Allow
about one
sixty-fourth
of an
inch
(1/64")
between
pointof
Iooper
and
needle,
do not
allow
point of Iooperto rub or
strike
needle. It
will
be neces
sary to slide Iooper in or out to attain proper clearance. See
Figure No. 6, Page 9.
Next return machine to position A-A, Figure No. 5, and tight
en set screw securely. Be sure Iooper does not move out of
position.
NOTE:
The point of the iooper
must
pass through the center
of
the
needle scarf. The scarf is
the
hollowed
out
section just
above the eye of the
needle,
see
Figure
No. 6.
Unless
the
needle bar has been
moved
or has slipped, the Iooper
will
automatically time up properly. See next paragraph for
needle
bar
setting.
Figure
No.
5
Page Eight
FLUSH
Figure No. 6
Rgure
No. 6A
13. To adjust or replace needle bar:
A.
Remove
front
cover
No.
I-I24L
B.
Turn
machine
pulley
until
Iooper is in approximate position
shown
in
Figure
No. 6A. With
wrench
No. I-1478, slightly
loosen set screws C, Rgure No. 7. Raise or lower needle bar
and/or turn
machine
pulley
to bring needle and Iooper in
proper relationship per Figure No. 6A. Do
not
change
Booper
setting.
Make sure needle is not bent and is in
the
needle
bar
as
far
os it
can
go,
see paragraph 11,page 7.
C. Securely
lock
the two set
screws
C, and replace cover.
Figure No. 7
NEEDLE
BAR
Page
Nine
From the library of: Superior Sewing Machine & Supply LLC
