Over Looper / Lower Looper Gap Adjustment - Brother SB3734T Service Manual

Adjustment
1. Turn the pulley counterclockwise rotation, and
then set the over looper and the lower looper at
the position of the figure.
Lower looper
6.5 to 7.0 mm
Lower looper
2. Loosen the screw (set screw, socket (CP) M4x4)
for the over looper assy.
Over looper assy
Set screw, socket
(CP) M4x4

Over looper / lower looper gap adjustment

Over looper
Over
looper
3 - 12
3. Adjust the gap between the over looper and the
lower looper to 0 to 0.05 mm.
Lower looper
Over looper
0 to 0.05 mm
Lower looper
4. Fasten the screw (set screw, socket (CP) M4x4)
for the over looper assy.
Over looper assy
Set screw, socket
(CP) M4x4
Over
looper