Brother DB2-DD7100, Service Manual

Page: 48 / 153

6. ASSEMBLY
SL-710A
41
6-11. Feed bar mechanism
1. Install the feed dog (1) to the feed bracket assembly
(2) with the two screws (3).
2. Place the feed bracket assembly (2) onto the feed
rocker shaft (4).
3. Insert the wick (5) into the hole in the feed rocker shaft
(4), and then insert the oil cap (6).
4. Provisionally install the needle plate (7) in order to
position the feed bracket assembly (2).
5. Move the feed bracket assembly (2) to the left and
right until the left and right clearances between the
feed dog (1) and the needle plate (7) are the same.
[Feed dog left/right adjustment]
6. Place the feed lifting eccentric wheel assembly (8)
onto the lower shaft (9).
7. Place the end of the feed bracket assembly (2) into the
fork in the feed lifting eccentric wheel assembly (8),
and then insert the feed lifting rock bracket stud (10).
8. Align the O mark of the feed lifting rock bracket stud
(10) with the reference line on the feed lifting eccentric
wheel assembly (8), and then tighten the set screw
(11). (Figure (A))
9. Align the O mark of the feed lifting eccentric wheel (12)
with the reference line on the lower shaft (9), and then
tighten the two set screws (13). (Figure (B))
10. Adjust the forward/back position of the feed dog (1).
1) Turn the stitch length dial to the maximum setting.
2) Turn the pulley to rotate the feed bracket assembly
(2) in order to adjust so that the clearance between
the movement range of the feed dog (1) and the
needle plate (7) is equal at the front and the back.
3) Tighten the two screws (14).
1748M
(3)
(1)
(2)
1752M
1751M
1750M
1749M
(14)
(4)
(9)
(6)
(5)
(2)
(8)
(13)
(7)
(12)
(6)
(1)
(7)
Clearance
Clearance
Clearance
Clearance
Movement range
[B]
[A]
(10)
(8)
(10)
(1)