Singer 451k41 - Bobbin Case Holder and Sewing Hook Procedures; REMOVAL OF THE SEWING HOOK; REPLACEMENT OF THE SEWING HOOK

THE BOBBIN CASE HOLDER
REMOVAL
Remove needle.
Remove bobbin case and bobbin, as instructed on
page 7.
Remove large screw R and position finger S, Fig. 53.
Turn hook body B, to position shown in Fig. 53 and
remove three small screws A4 and hook-section
C4, Fig. 53.
Turn bobbin cose holder in hook to position shown
in Fig. 53 and slip bobbin case holder out of hook.
REPLACEMENT
Turn hook B to position shown in Fig. 53.
Install bobbin case holder T in hook body, keeping
holder T in the relative position to hook body shown
in Fig. 53.
Replace hook section C4, fastening it to hook body
with three small screws A4, Fig. 53.
Turn bobbin case holder T as required to bring
thread clearance notch L at top of holder ready to
accept position finger S, as shown in Fig. 53.
Replace position finger S, as shown in Fig. 53 fast
ening it to machine with screw R.
Set thread clearance of position finger, as instructed
on page 14.
Replace needle, as instructed on page 6.
THE SEWING HOOK
REMOVAL
Remove needle, slide plate and bobbin cose. Re
move screw R, Fig. 54. Remove bobbin case holder
position finger S, Fig. 54. Loosen two screws D, Fig.54
in hub of hook. Turn machine pulley over away from
you until feed bar G3, Fig. 55 is raised to its highest
point. Turn sewing hook until thread guard F3 is at
the bottom, as shown in Fig. 54. Turn bobbin case
holder until it is in position shown in Fig. 55.
Remove sewing hook from machine.
While sewing hook is off shaft, check oil wick
276062, as instructed on page 6.
REPLACEMENT
When replacing sewing hook on shaft, have thread
guard F3, Fig. 55 at bottom of hook and bobbin case
holder T turned to position shown in Fig. 55, so that
hook will clear feed bar G3. Press hook all the way
on shaft.
Turn bobbin case holder T, Fig. 53 until notch L is
at top, OS shown in Fig. 53. Replace position finger
S, Fig. 54, being careful to see that position finger
enters notch L at top of bobbin case holder, as shown
in Fig. 54. Securely fasten position finger S by meons
of screw R, Fig. 54. Replace bobbin case, slide plate
and needle.
Time sewing hook, as instructed on page 14.
20
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Fig. 53. Position of Bobbin Case
Holder, in Relation to Hook;
Necessary for Removal or Replacement
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Fig. 54. Sewing Hook in Place
Fig. 55. Position of Hook
in Relation to Feed Bar;
Necessary for Removal or Replacement
From the library of: Superior Sewing Machine & Supply LLC