Shuttle Race Mechanism - Brother LK3-B430E Mark II Service Manual

5-12. Shuttle race mechanism

w
r
e
e
i
i
y
t
1. Attach the needle bar thread guide q to the needle bar w, and attach the needle e (DP × 5 for knitwear, DP
× 17 for denim) with its long groove facing the front, using the set screw r.
2. Fit the inner rotary hook y in the shuttle race base t. Turn the pulley to raise the needle bar w from its
lowest position until the lowest reference line B (for DP × 17 needle; use the second lowest reference line
b for DP × 5 needle ) is aligned with the bottom of needle bar bush D u. Loosen the screw o, and move
the driver i to align the center of the needle C with the inner rotary hook point D.
3. Make sure that the needle e just makes contact with the needle guard of the driver i when the center C
of the needle is aligned with the point of the inner rotary hook. If it does not, loosen the set screw ! 0 , and
turn the eccentric shaft !1 . Retighten the set screw !0 afterwards.
4. Make sure that there is a 0.01 - 0.08 mm clearance between the needle e and the point D of the inner
rotary hook when they are aligned. If there is not, loosen the set screw !2 , and turn the eccentric shaft !3 .
Retighten the set screw !2 afterwards.
5. Attach the large shuttle hook ! 4 to the shuttle race base t, insert the bobbin ! 5 into the bobbin case ! 6 ,
and fit them in the inner rotary hook y.
6. Attach the felt support !7 to the shuttle race base t.
* Place it as shown in the illustration so as not to clamp the felt !8 , and then gently press the felt !8 and the
wick !9 until they are at the same height as the rotary hook race.
* Return the support @0 to its original position.
w
q
b
(DP × 5)
!1
!0
!2
!3
!4
@0
!5
!6
y
o
LK3-B430E Mark II
u
B
DP × 17
e
t
!7
!8
5. ASSEMBLY
Needle center C
e
Rotary
hook
point D
i
y
0.01 - 0.08 mm
y
!8
!9
!8 !7
38