Main unit
1
Attachment of Plate spring
1. Attach the plate spring 1 from the front of the arm bed with the 2 screws
1.
2. Attach the adjusting screw 2 from the back of the arm bed.
*Key point
• Tighten the adjusting screw 2 so that the screw threads are
completely hidden.
1
3 - 6
Needle bar, presser mechanism / upper shaft mechanism
Screw, Bind
M4X8
Torque
1.18 – 1.57 N·m
1
1
2