Brother DB2-DD7100, Service Manual

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6. ASSEMBLY
SL-710A
32
6-4. Lower shaft, lower shaft gear and feed regulator set
1. Hold the lower shaft (1) so that it faces as shown in the
illustration, insert it into the arm, and pass it trough the
lower shaft gear (2) and the level feed eccentric wheel
(3) of the feed regulator assembly inside the gear box.
2. Insert the lower shaft (1) into timing pulley D (4) until it
is almost to the edge of timing pulley D (4).
3. Set so that the set screw (6) above the gear (5) and
the set screw (7) below the lower shaft gear (2) are
facing forward, and then align the blade of the gear (5)
with the blade of the lower shaft gear (2). In this
condition, align the screw stops on the lower shaft (1),
and then tighten the lower set screws (7).
4. Tighten the upper set screws (7).
5. Tighten the two set screws (8).
(At this time, align the screw stops of the lower shaft
(1) with the lower set screws (8).)
6. For the DD7100A and 710A, insert the two spacers (9)
into the screw holes in timing pulley D (4).
7. While pushing the lower shaft (1) in the direction of
timing pulley D (4), tighten the two set screws (10)
[four set screws (10) for the DD7100].
* Check that the lower shaft (1) turns smoothly with
no play in the axial (left-right) direction.
8. Insert the stud arm (11) into the arm, and then place it
straight into the joint (12).
1717M
(10)
(4)
(3)
(2)
(1)
(8)
Screw stops
(1)
(5)
(6)
Align
(7)
(2)
<DD7100>
(9)
(10)
1718M
(12)
(11)