Sec. 8 Needle Timing To Shuttle Hook - Singer 7422 Service Manual

Sec. 8 Needle timing to shuttle hook
Check "Needle timing to feed dog" and "Needle bar height" beforehand.
Checking:
1. Set mode at 1.
2. Remove needle plate. Check to see if needle is not bent.
3. Move needle to left position by turning hand wheel.
Raise needle from its lowest position slowly and check if distance is as illustrated below,
when point of shuttle hook aligns with right side of needle.
0.5〜0.8ｍｍ
Adjustment:
1. Remove front cover. Loosen two screws on gear and adjust position of gear as illustrated
below.
With one screw tightened temporarily, check to see if the clearance is as illustrated above.
2. Adjust it by turning main shaft with hand wheel, with screws loosened and hex driver inserted
into one of the screws. Tighten screws securely after adjustment.
Point of shuttle hook
- 18 -