Singer 451k41 - 2. SETTING NEEDLE BAR AT CORRECT HEIGHT; 3. TO SET NEEDLE BAR AT CORRECT HEIGHT WITHOUT USE OF TIMING MARK

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Fig. 30. Timing Mark on Take-up
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Fig. 31. Timing Mark on Feed
Lifting Connection
BOBBIN
CASE
HOLDER
NEEDLE
GUARD
Fig. 33. Correct Height of Needle
when at Bottom of Stroke
2. SETTING NEEDLE BAR AT CORRECT
HEIGHT
Turn machine pulley over away from you until tim
ing mark E2, Fig. 30 on take-up is in line with mark
F2, Fig. 30 on face plate.
Needle bar should then be at its highest position
and lower timing mark M2, Fig. 30 on needle bar
should be just visible below lower end of needle bar
bushing.
To set needle bar at correct height, remove two
screws Z2 and rotary take-up guard N2, Fig. 30 and
loosen needle bar connecting stud pinch screw 12,
Fig. 32, through hole in face plate. Move needle bar
to correct height and securely tighten screw L2.
3. TO SET NEEDLE BAR AT CORRECT
HEIGHT WITHOUT USE OF TIMING MARK
(when needle bar bushing has been disturbed)
Turn machine pulley over away from you until
needle bar is at bottom of its stroke.
Loosen screw L2, Fig. 32.
Raise or lower needle bar as required to bring eye
of needle just above needle guard of bobbin case
holder, as shown in Fig. 33, allowing freedom for
needle thread.
Securely tighten screw L2.
Figures 34 and 35 illustrate opposite extremes of
incorrect settings of needle bar in relation to needle
guard on bobbin case holder.
£30 927
BOBBIN
CASE
HOLDER
NEEDLE
GUARD
Fig. 34. Needle Too Low
when at Bottom of Stroke
13
Fig. 32. Needle Bar Setting
BOBBIN
CASE
HOLDER
NEEDLE
GUARD
Fig. 35. Needle Too High
when at Bottom of Stroke
From the library of: Superior Sewing Machine & Supply LLC