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Brother LH4-B800E Service Manual Page 67

Electronic lockstitch button holer.
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3. ASSEMBLY
o
!1
Insert the two linear ball bearings !0 into the guide bracket !1 .
Provisionally install the bearing holder !2 with the bolt ! 3 .
Pass the two guide shafts !4 though the motor bracket assembly o and the guide bracket !1 . Secure the guide shafts !4 by tightening the four
set screws !5 .
Provisionally install the presser driving arm !6 to the guide bracket !1 with the four bolts !7 . Then securely tighten the bolt !3 .
Insert the washer ! 8 into the driving arm presser ! 9 , and then pass it through the presser driving arm ! 6 and insert into the motor bracket assembly
o.
Provisionally tighten the set screw @ 0 . Then tighten the bolt ! 7 and the set screw @ 0 so that the presser driving arm ! 6 moves up and down easily
and so that there is no play in the gear.
Insert the motor bracket assembly o into the arm from the top. Position it using the two positioning pins @1 , and then install it by tightening the four
screws @2 and the screw @3 .
Install the clamp sensor plate @4 with the pan screw @5 .
Install the sensor @6 with the screw @7 .
Install the clamp sensor dog @8 to the upper thread trimmer driving link #0 with the two screws @9 .
3 - 12
!0
!1
!3
!2
!5
!1
!4
!3
!7
!6
@1
@3
LH4-B800E
!7
!6
@0
!8
!9
Apply grease to !9
@2
o
Apply grease
@5
@4
@6
@7
@6
@7
@8
@9
#0

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