Looper Take-Up Position Adjustment - Brother SB3734T Service Manual

Adjustment
1. Turn the pulley counterclockwise rotation, and
then the over looper assy is the lowest position.
Looper thread take-up B
Over looper assy
2. Loosen the screw (screw, bind M4x20) for the
looper thread take-up A, B.
Screw, bind M4x20

Looper take-up position adjustment

Pulley
Looper thread take-up A
3 - 21
3. Adjust the position of from the extension of the
thread guide #8 to the right side of the looper
thread take-up A to 3.4
adjust the position of from the extension of the
thread guide #8 to the left side of the thread

take-up B to 4.6 1.0 mm.
Looper thread take-up B
4. Fasten the screw (screw, bind M4x20) for the
looper thread take-up A, B.
Screw, bind M4x20

1.0 mm, and then
Thread guide No.8
3.4 ± 1.0 mm
4.6 ± 1.0 mm
Looper thread
take-up A