Presser Lifter Mechanism - Brother LH4-B800E Service Manual

3. ASSEMBLY

3-6. Presser lifter mechanism

!0
Apply grease to o
!1
(B)
t
Install the presser lifter connecting rod assembly q and the knee lifter lever w with the spacer e, plain washer D r
and bolt t. (Presser lifter connecting rod set y)
Install the presser lifter connecting rod set y and the lifter shaft assembly u with the shoulder screw i.
Insert the two trimmer driving levers o to the inside of the arm. Pass the two O-rings !0 into the shaft from the outside
of the arm, and fit them into the hollow in the arm.
Insert the pin of the tension release driving lever !1 into the cam grove in the lifter shaft assembly u, and then insert
into the arm.
Install the O-ring !3 to the tension release shaft !2 , and then insert into the arm. At this time, insert the tension release
cam ! 4 , pass the tension release driving lever ! 1 through the tension release cam ! 4 , and then install the retaining ring
! 5 .
While pushing the tension release shaft ! 2 in the direction of the arrow (A), push the tension release driving lever ! 1
in the direction of the arrow (B) to align it with the screw stop on the tension release shaft !2 , and secure by tightening
the set screw ! 6 . Then secure the tension release cam ! 4 by tightening the set screw ! 7 .
Install the lifter shaft !8 , small plain washer 8 !9 and retaining ring E6 @0 to the arm. Secure by tightening the set screw
@ 1 .
Install the driving lever roller @2 to the trimmer driving lever o with the shoulder screw @3 . Install the ball bearing @4 to
the trimmer driving lever o with the shoulder screw @3 .
Install the presser lifter connecting rod set y to the arm with lifter shaft A @ 5 and the set screw @ 6 .
3 - 10
o
@2
@3
@4
@3
Apply grease to @3
!6
!5
!7
!2
!4 !3
(A)
Apply grease to r
r
e
y
w
q
u
Insert into the
cam groove
!8
Apply grease to !8
@1
LH4-B800E
u
Apply grease
y
!1
!9
@0
@6
@5
Apply grease to @5
y
i