4-49. BUTTON SEWING MACHINE MAINTENANCE ADJUSTMENT PROCEDURES - continued.
To adjust the tension of the thread pull-off (front).
Should it become necessary to adjust the tension of the thread pull-off (front) (1) loosen set
screw (2) and turn the hexagon nut (3) up to tighten the spiral spring (4) thus increasing the
tension of the thread pull-off (front) (1), or turn the hexagon nut (3) down to decrease the tension.
When the tension is correctly set, securely tighten screw (2).
To adjust the thread pull-off (back).
Thread pull-off (back) (5) should move back toward the left of the thread post (6) about ½ inch
when the button clamp is lifted to its highest position
To adjust, loosen screw (7) and move the thread pull-off (back) (5) backward or forward (left or
right), as required, to set as stated, then securely tighten screw (7).