28
Thread drawing lever
5.5 – 6.0 mm
Hexagonal socket bolt
Hook race
View A
Thread drawing lever
View A
Hook race
Mechanical adjustment
Thread drawing lever
The standard height of the thread drawing lever from the surface of bobbin holder should be in the range of 5.5 – 6.0
mm.
1. Remove the presser foot, the needle plate and the
bobbin holder.
2. Loosen the hexagonal socket bolt (use an Allen key
of 1.5 mm width across flats) . Adjust the distance
between the lower part of thread drawing lever and the
hook race to 5.75 mm by moving the thread drawing
lever up or down.
3. Tighten the hexagonal socket bolt.
