Upper Shaft Mechanism - Brother LK3-B430E Mark II Service Manual

4-5. Upper shaft mechanism

e
!8
1. Loosen the screw w and the set screw e of the thread take-up crank q.
* The screw w should be loosened until its end comes off the upper shaft r.
2. Remove the screw t, and the thread trimming solenoid y.
3. Remove the screw u, and the wick support i.
4. Remove the screw o, and the crank rod ! 0 .
* At this time, lower the lower part of crank rod !0 in the direction of the arrow.
5. Loosen the set screws of the bobbin winder pulley ! 1 and the thread trimmer cam ! 2 .
6. Remove the V-belt !3 , loosen the set screw !4 , and remove the pulley !5 .
7. Remove the screw ! 6 and the synchronizer ! 7 .
8. Remove the upper shaft r in the direction of the arrow.
* After that, remove the thread take-up crank q, the washer ! 8 , the bobbin winder pulley ! 1 , and the
thread trimmer cam ! 2 from the upper shaft r, in this order.
w
q
t
o
!0
!2
!0
r
!1
LK3-B430E Mark II
y
u
i
r
4. DISASSEMBLY
!7
!6
!4
!3
q
!8
!1
!2
!5
14