3-8-9.Attaching The Needle Bar Bush U And The Needle Bar - Brother RH-981A Service Manual

3-8-9. Attaching the needle bar bush U and the needle bar
3739Q 1. Put the thrust bearing (2) and the thrust washer (3) on
the needle bar gear (1). Attach them to bearing 25/20
(4), and secure them using gear supports A (5) and B
(6) and the screws (7) so that the needle bar gear (1)
can turn easily but without any end play.
* Do not forget to attach timing belt U.
2. Insert the plate spring (8) into the hole in the arm, and
bind it using needle bar bush U (9) and the needle
bar bush nut U (10).
3. Temporarily attach holder base B (11) using the three
bolts (12).
4. Pass the needle bar assembly (13) through the arm
from above.
5. Insert the needle bar felt (14), the needle bar clamp
(5), the needle bar level feed link (16), the needle bar
block clamp (17), the needle bar level feed link (18),
and the needle bar block collar (19), through the
needle bar assembly (13) in this order.
3740Q
RH-981A
3. ASSEMBLY
30