SINGER 251 - Manual (Page 29)

29
TO REPLACE THE SEWING HOOK
J2
E2
Fig. 47. Replacing Sewing Hook (Correct Position of Thread Guard
and Bobbin Case Holder)
When placing a new sewing hook on the shaft,
have the sewing hook thread guard F2 at the bottom
and the bobbin case holder G2 turned to the position
shown in Fig. 47, so that the hook will clear the feed
bar C2.
case holder position bracket E2, making certain that
the finger K2 (see inset) enters the notch J2 at the top
of the bobbin case holder. Then securely fasten the
position finger by means of the screw D2.
Place the hook in position on the shaft and turn the
bobbin case holder G2 until the notch J2 is at the top,
as shown in circular inset above. Replace the bobbin
Replace the needle. Time the sewing hook, as in­
structed on page 21. Replace the bobbin case, throat
plate and slide plate.