Brother AE2700, Service Manual

Page: 46 / 205

2 - 30
Upper shaft, Needle bar and Presser foot unit Basic of Assembly
Basic Basic
3
Attachment of Upper shaft assy
1. Pass the timing belt
1
to the upper shaft assy
2
.
2. Set the thread take-up counter weight
3
to the needle bar crank rod assy
4
.
3. Set the lower shaft bushing
5
and the lower shaft bushing
6
to the 2
positioning parts of the arm bed.
4. Align the D cut face
7
of the needle bar crank rod assy
4
with the screw
hole on the thread take-up counter weight
3
, and then tighten the screw
1
.
5. Set the 2 bushing pressers
8
to the arm bed, and then secure them with the
2 screws
2
.
→
Refer to 3 - 50 of the Assembly.
Apply FBK OIL RO 100 to the matching section of
the upper shaft and the lower shaft bushing
5
.
2 drops
Apply FBK OIL RO 100 to the left and right end of
the lower shaft bushing
6
.
2 drops
Apply FBK OIL RO 100 to the sliding surface of
the needle bar crank rod assy
4
and the thread
take-up counter weight
3
.
2 drops
1
Hex wrench 2.5mm
2
3
1 4 7
3
4 1
5
2
6 1
2
2
8
8 2
6
Set Screw, Socket (FT)
M5X5
Taptite, Bind S
M 4X10