Brother b831 Service Manual page 15

CD THREAD WIPER
Terminal pin
1 2-pin plug
Procedures
1.
2.
•3.
4.
5.
6.
Terminal pin
(black)
Terminal pin
(white)
Remove thread wiper spring O-
Remove plunger pin O-
Remove solenoid link O- thread wiper assembly 0. and rubber stopper 0.
Remove three flat screws O and remove thread wiper solenoid cover 0.
Remove four screws 0 and remove three cord braces 0.
Remove four flat screws 0 and remove solenoid ®. (Remove terminal pin from the 12-pin plug.
(U ROTARY HOOK, LOWER SHAFT AND THREAD TRIMMER MECHANISM
(1) Rotary Hook
Procedures
1. Loosen screw O and remove screw 0: then remove throat plate 0.
2. Remove flat screw 0 and remove bobbin case opener 0 and washer 0 (right and left).
3. Turn over the machine
4. Loosen three screws O (right and left screws).
5. Remove two thread cutter return springs 0.
6. Turn the machine upright.
7. Remove screws 0 0 and remove movable knife 0
8. Turn the machine pulley and move the needle bar to the highest point.
9. Remove two screws 0 and remove feed dog 0.
10. Remove rotating hook 0 and spacer 0 (right and left).
* Be sure not to confuse the right and left rotary hooks 0 and spacers 0 when assembling.
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