Brother LH4-B800E Service Manual page 70

w
t
r
r
q
y
q
e
i
Align edges
o
!0
Insert the cutter driving shaft q into the arm from the top, and then pass it through the holes in the felt w and the
driving shaft holder assembly e. Pass the cutter driving shaft q through the oil rejector r. Provisionally secure the
driving shaft holder assembly e with the two set screws t.
Fully tighten the set crews t so that the edges of the cutter driving shaft q and the bush i are aligned when the
clearance between the edges of the cutter link bracket y and the cutter solenoid u is 1.5 mm (or when dimension (A)
is 15.5 mm).
Install the screw assembly o to the arm, and secure it with the nut !0 so that the stepped section of the cutter driving
shaft q protrudes by 5 mm from the processed surface of the arm jaw.
Attach the spring ! 1 to the cutter driving arm assembly ! 2 and the tension release shaft ! 3 .
Install the knife sensor assembly !4 with the screw !6 so that the clearance between the knife sensor assembly !4 and
the solenoid stopper !5 is 4.5 mm. At this time, be careful not to clamp the wick @9 .
Install the cutter holder ! 7 to the cutter driving shaft q with the bolt ! 8 .
Provisionally install cutter holder M !9 to the cutter holder !7 with the bolt @0 . Provisionally install cutter holder DL @1
to cutter holder M !9 with the screw @2 . Install the cutter @3 to cutter holder DL @1 with the screw @4 . Fully tighten the
bolts ! 8 and @ 0 so that the cutter @ 3 is in the center of the cutter groove in the needle plate @ 5 when the cutter is
lowered.
!3
!1
e
!2
q
(A)
u
1.5 mm
o
!0
q
5 mm
!4
!6
@9
4.5 mm
!4
!5
u
q
!8
!7
Place against end of shaft
LH4-B800E
3. ASSEMBLY
!7 @0
!9
@1
@2
@3
@4
@3
@3
@5
@5
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