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Thread Breakage Detector Mechanism - Brother HE-800B Service Manual

Electronic direct drive lockstitch button holer.
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1. Upper thread trimmer fulcrum
shaft
2. Set screw collar
3. Set screw [2 pcs]
4. Rubber cap
5. Adjusting plate
6. Upper thread trimmer lever
7. Washers [2 pcs]
8. Bolts [2 pcs]
9. Stop plate
10. Back plate
11. Collar [2 pcs]
12. Screws [2 pcs]
13. Spring
14. Support shaft
15. Plain washer
16. Nut
17. Setting plate
18. Plain washers [2 pcs]
19. Screws [2 pcs] (Temporarily
tighten)
20. Longitudinal feed arm pin

6-13. Thread breakage detector mechanism

1. Thread breakage perceiving
shaft
2. Thread guide
3. Plain washer
4. Plain washer
5. Screw
6. Cutter bar fixed plate
7. Balancer
8. Screw
21. Set screw
22. Longitudinal feed arm roller
23. Retaining rings [2 pcs]
24. Driving arm roller
25. Roller shoulder screw
26. Spring washer
27. Nut
28. Support plate
29. Plain washer
30. Bolt (Temporarily tighten)
31. Back stopper
32. Plain washer
33. Bolt (Temporarily tighten)
34. Roller
35. Upper
thread
assembly
36. Washer
37. Screws [2 pcs]
38. Longitudinal feed arm assembly
39. Bolt (Temporarily tighten)
40. Trimmer driving arm
9. Set screw (Temporarily tighten)
10. Lever stopper [2 pcs]
11. Screws [2 pcs] (Temporarily
tighten)
12. Sensor
13. Screw
14. Thread breakage sensor plate
15. Screws [2 pcs] (Fully tighten)
HE-800B
41. Bolt (Temporarily tighten)
42. Extension spring
43. Extension spring
44. Stopper
45. Scissors M
46. Scissors U
47. Shoulder screw, SM3.18
48. Thread trimmer assy D
49. Plain washer
50. Spring washer
51. Screw (Temporarily tighten)
52. Opening cam
53. Washer plain
54. Spring washers [2 pcs]
trimmer
lever
55. Set screws [2 pcs]
56. Nuts [2 pcs]
57. Cam setting plate
58. Feed arm support
59. Screws [2 pcs] (Temporarily
tighten)
6. ASSEMBLY
0721D
80

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