Brother SB3734T Service Manual page 11

Outline of Mechanism Driveline
(D) Movement of looper
Looper driving
OL link OL eccentricity Spiral bevel gears Driving shaft Pulley
shaft
UL eccentricity
OL lever
O.L shaft
UL link
Over looper UL lever
Lower looper
Over looper
Spiral bevel gears
O.L shaft
Driving shaft
Pulley
OL eccentricity
UL eccentricity
Lower looper
Spiral bevel gears
UL lever
Looper driving shaft
OL lever
OL link
UL link
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