Thread Tension Release Adjustment - Brother SB3734T Service Manual

Adjustment
1. Turn the all thread tension dials to [9],
2. Lift the presser foot lever and loosen the screw
(screw, truss M3x8) of the thread tension release
cam.
Screw, truss M3x8
Thread tension release cam

Thread tension release adjustment

Thread tension dial
Presser foot lever
3 - 17
3. Shift the thread tension release cam in the
direction of the arrow to abut the thread tension
lever to the thread tension release.
Thread tension release
Thread tension
release cam
4. Fasten the screw (screw, truss M3x8) for the
thread tension release cam.
*Key point
• When tightening the screw, make sure that
there is a clearance between the tension disk
A and the tension release disk B.
Tension disc A
Screw, truss M3x8
Thread tension release cam
Thread tension
lever
Tension release disc B