TIMING THE SEWING HOOK
Regulate stitch length so that there is no feeding
Remove throat plate and turn machine pulley over
toward you until lower timing mark on needle bar is
just visible at lower edge of needle bar frame on up*
ward stroke of needle. With needle in this position,
sewing hook is correctly timed if hook point is at
vertical centerline of needle blade.
If sewing hook is not correctly timed, loosen socket
screws shown in Fig. 30 and turn to proper timing
position specified above.
REMOVING BOBBIN CASE FROM SEWING HOOK
Remove hook gib screws, indicated in Fig. 31(a),
from sewing hook. Lift off hook gib and remove bobbin
REMOVING SEWING HOOK FROM MACHINE
Remove presser foot, throat plate and feed dog.
Loosen hook hub socket screws shown in Fig. 32.
Lift hook off end of shaft.
To remove hook shaft, first remove ball bearing
retaining cap screws directly under hook shown in
Fig. 31(b). Tip machine back and loosen hook shaft
gear hub socket screws shown in Fig. 30. Lift out
shaft from top end. If shaft does not lift out easily,
loosen screws in cover plate of hook saddle just
enough, at first, to permit the oil to drain out. Then
remove cover plote completely, being careful not to
damage the gasket. Tap the end of hook shaft.
Fig. 30. Sewing Hook Timing Adjustment
VIEW UNDER HOOK (b)
Fig. 31. Bobbin Case Removal
Fig. 32. Bobbin Case Removal
From the library of: Superior Sewing Machine & Supply LLC