Brother S-7300A Service Manual page 56

4. MECHANICAL DESCRIPTIONS
Thread trimmer cam lever (Direction of rotation)
<Other than premier specifications>
1212D
1. Forked shaft
return spring
2. Forked shaft
3. Thread trimmer
cam lever
4. Roller
45
<3> Thread trimmer
lever
<4> Movable knife
connecting rod
<5> Movable knife
holder
<6> Movable knife
<Premier specifications>
1. Forked shaft
return spring
2. Forked shaft
3. Thread trimmer
cam lever
4. Roller
S-7300A
<3> Thread trimmer
lever
<4> Upper knife [4] Lower knife
connecting rod
<5> Upper knife [5] Lower knife
holder
<6> Upper knife [6] Lower knife
1211D
1044D
connecting rod
holder