Feed Unit Assembly Attachment; Upper Shaft And Lower Shat Phase Matching - Brother BC800 Service Manual

Main unit
10

Feed unit assembly attachment

1. Fit the feed unit 1 to the arm bed cover attachment position, and secure
them with the 2 screws 1.
2. Fit the lower shaft bushing 2 to the arm bed cover attachment position, set
the lower shaft bearing presser 3, and secure them with the 2 screws 2.
*Key point
• Set the lower shaft bearing presser 3 so that the projecting
part of 3 is positioned at upper right.
3. Apply 1 or 2 drops of OILER to the matching section of the lower shaft 4
and the lower shaft bushing 2.
Apply OILER to the matching section of the lower shaft
and the lower shaft bushing.
1
2
11

Upper shaft and lower shat phase matching

1. Rotate the upper shaft 1 until the trench on the upper shaft pulley 2 is at
the front.
2. Turn the lower shaft 3 to the point where the mark on the outer rotary
hook 4 is at the front, the larger feed cam 5 is at the rear, and the hole on
the lower shaft 6 is at the top.
3. Pull the timing belt 7 and hang it over the timing pulley D 8.
Start movie clip (CD-ROM version only)
Main parts
Giza Tite
5X16
1.18 – 1.57 N
Color; Gold
Giza Tite
5X16
1.18 – 1.57 N
Color; Gold
1
1 - 2 drops
XZ0206***
Torque
·
m
Torque
·
m
4
1
8
4
1
2
2 3
2
7
7
3
6
3
5
3 - 9