TM 10-3530-207-14
2-1. CLOTHING SEWING MACHINE - continued.
11.
Needle Upper Thread Tension Adjustment.
Tension of the Upper (Needle) Thread.
Before adjusting the tension of the upper thread, be certain that the presser foot is let down and not in
the lifted position. Turning the nut to the right (clockwise) increases needle tension. Turning the nut to
the left (counterclockwise) decreases needle tension.
12.
Needle Lower Thread Tension Adjustment.
Tension of the Lower (Bobbin) Thread.
The tension of the lower thread is regulated by screw on the bobbin case tension spring. Tighten the
screw slightly to increase the tension, or loosen it to slacken the tension.
2-7
