Thread Nipper Mechanism - Brother KE-430F Service Manual

10. ASSEMBLY

10-5. Thread nipper mechanism

Apply grease to the portions indicated by the white arrows.
1. Eccentric shaft (Install the ball bearing (2) at the same time.)
2. Set screw [Tighten]
3. Spring hook plate
4. Plain washers [2 pcs]
5. Screws [2 pcs]
6. Spring extension
7. Thread nipper U
8. Shoulder screw, 6-0.9
9. Thread nipper spacer
10. Thread nipper collar
11. Thread nipper D assembly
12. Thread nipper shoulder screw
13. TN-connecting plate F assembly
14. TN-connecting plate R
15. Bolts [3 pcs]
16. Motor bracket rear assembly
17. Washers [2 pcs]
82
Screw stop
18. Bolts [2 pcs]
19. Lever shaft
20. Washer
21. Retaining ring, E
22. Thread nipper lever
23. Set screws [2 pcs: Tighten]
24. Washer, wave spring
25. Link shoulder screw
26. Pulse motor P assembly
27. Bolts [4 pcs]
28. Motor lever
29. TR-Link
30. Link shoulder screws [2 pcs]
31. Set screws [2 pcs: Tighten]
KE-430F, BE-438F
Set so that the hole (4) in the needle hole
plate is near the center of the hole in the
thread nipper D assembly (3), and also set so
that the screw stop of the pulse motor P
assembly 26 is facing the same way as the
harness connector (5); then tighten the two
set screws 31.
1) Loosen the set screw 2 about 1/3 of a turn
from its fully-tightened position so that the
eccentric shaft 1 can rotate.
2) Insert the Y-feed rack shaft (1), and then
turn the eccentric shaft 1 so that it is lightly
touching the ball bearing (2); then tighten
the set screw 2.
3) Temporarily remove the Y-feed rack shaft
(1).
2839B
2900B