Adjusting Methods Of Each Part; Play Of Arm Shaft - Singer 4423 Service Manual

3. Adjusting methods of each part
3-1 Play of arm shaft
- Remove the face plate, arm top cover.
- Loosen the screws (a, b) of arm shaft collar
(d). (1)
- Pull the hand wheel to the right. (2)
- Push the arm shaft collar (d) to right tightly
against arm shaft bushing (c), and then
fasten and secure the screws (a, b). (1)
- Be sure proper distance between arm shaft
collar and arm shaft bushing. (1)
- Be sure arm shaft operates smoothly after
adjustment.
- Arm shaft collar and arm shaft bushing being
too tightly closed might cause insufficient
operation of arm shaft.