Bobbin Case Clearances - Singer Inspiration 4228 Service Manual

Setting

Bobbin case clearances

Check
1. Remove the needle plate.
2. Turn handwheel to the front of the machine, to lead hook point to position (d).
3. Rest heel of the bobbin case against the position plate (c).
4. The clearance between retaining plate and bobbin case must be between 0,25 and 0,36 mm.
NOTE ! Equaly, the clearance between the extension of position plate (c) and bobbin case up-
per surface (f) should comply with the above criteria.
If the measurement is not correct:
Adjustment
1. Turn handwheel to the front of the machine, to lead hook point to position (d).
2. By means a screwdriver adjust clearances bending the extension upwards or downwards
according the measures.
Singer Inspiration 23