Brother 431B Sewing Machine User Manual


 
4. ASSEMBLY
KE-430B, 430C series
77
KE-484C
Make a gap of 3 mm
between the thread trimmer
cam and U-timing pulley F.
Align the ridge line at the back
of the groove in the upper
shaft with the edge of the
thread trimmer cam.
3385Q
3384Q
Apply adhesive (Threebond
1401 or similar) to the outside of
the bearing.
Apply grease.
Apply grease.
Upper shaft
bush
Place the thread take-up crank onto the
upper shaft from the face plate end,
tighten the screw into the hole in the
upper shaft, and then tighten the set
screw.
Place the thread take-up crank, thrust
w
asher and bobbin winder pulley into the
upper shaft bush so that there is no play
in the parts, and then tighten the set
screw at the screw stop position.
1. Up
per shaft 11. Set screws [2 pcs]
2. Thread trimmer cam 12. Set screws [2 pcs]
3. U-timing pulley, F 13. Tension pulley arm
4. U-timing belt, F 14. Adjusting screw
5. Bobbin winder pulley 15. Nut
6. Thrust washer 16. Adjusting screw
7. Thread take-up crank 17. Nut
8. Screw 18. Plain washer
19. Nut
9. Set screw
10. Set screws [2 pcs]