Singer 7422 Service Manual page 22

*Setting is OK if there is a room for long projection (concealed) of gear (a) to rotate.
*Setting is not good if the projection has collided with zigzag cam and doesn't move.
2. Adjustment
Turn off power switch.
Loosen two screws on gear (a) and tighten the screw near short projection temporarily.
Turn on power switch. Loosen the screw tightened temporarily on gear (a) and rotate gear (a)
clockwise until it touches with limiter and tighten two screws securely.
Stitch balance
If forward and reverse pitch is not balanced due to imperfect zero feed adjustment, adjust by
changing position of motor gear.
Screw on motor gear
Adjustment
In case of small deviation from correct zero feed, adjust as follows:
*It is recommended to use SINGER test needle when checking Zero feed.
1. Turn off power switch.
2. Loosen one of two screws on motor gear.
Screw to be tightened temporarily.
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Stepping motor for
stitch length