Brother BAS-311H Service Manual page 70

7. ASSEMBLY
Install the presser bar spring collar (22) as shown in
the illustration, and then adjust the height of the
presser adjusting screw (26) to 32 mm.
Notes on the installation position
(Refer to "8-16. Adjusting the intermittent
work clamp".)
Inside
hole
Inside
hole
Tighten the set screw (17) on the screw stop
while lightly pressing the link shaft (16).
3373B
61
1) With the needle bar lowered approximately 6.5 mm from its
highest position, set the stepping clamp arm F (8) to the
position of the straight line in the illustration.
2) Place a bushing in between stepping clamp arm F (8) and
stepping clamp arm R (9) so that there is no play, and then
tighten the bolt (10).
3371B
3370B
BAS-311H
At the needle bar timing position, align
the index marks of the stepping clamp
cam and the stepping clamp connecting
rod, and then tighten the set screws (7).
7. Set screws [2 pcs.]
8. Stepping clamp arm F
9. Stepping clamp arm R
10. Bolt
11. Presser bar clamp
12. Presser bar
13. Bolt (Temporarily tighten)
14. Stepping clamp lifter link
15. Washer
16. Link shaft (with retaining ring)
17. Set screw
18. Shoulder screw
19. Screw
20. Shoulder screw
21. Screw
22. Presser bar spring collar
23. Presser bar spring
24. Presser bar spring guide
25. Adjusting screw nut
26. Presser adjusting screw
27. Presser foot
28. Plain washers [2 pcs.]
29. Finger guard
30. Screw (Temporarily tighten)
3372B