Brother b831 Service Manual page 17

Thread Trimmer and Rotary Hook
© o
Procedures
1. Loosen screw O (right and left).
2. Remove screw O and remove washer O (right and left).
3. Loosen screw O and remove set screw 0 (right and left).
4. Remove lever L assembly 0 (moving shaft) and remove rocking arm O.
5. Remove lever R assembly 0 (moving shaft) and remove rocking arm Q.
6. Turn the machine upright.
7. Remove two flat screws 0 and remove slider assembly 0 (right and left).
8. Turn the machine over.
9. Loosen two screws 0 and screws ® and ©, and raise feed bar © forward.
10. Remove rotary hook base L © and then rotary hook base R ©.
0 REVERSE MECHANISM
1 2-pin plug
Procedures
1. Turn the machine upright.
2. Remove screw O and remove reverse solenoid cover 0.
3. Remove stud screw 0.
4. Remove three flat screws O and remove reverse solenoid bracket 0.
5. Remove the pin terminal from the 12-pin plug.
- 1 4 -
•Terminal pm (black)
• Terminal pin (white)