Brother SB3150 Operation Manual page 121

■ If there is a screw in the needle plate cover
1 Use the disc-shaped screwdriver to remove the screw
in the needle plate cover.
2 Grasp both sides of the needle plate cover, and then
slide it toward you.
1 Needle plate cover
■ If there is no screw in the needle plate cover
1 Grasp both sides of the needle plate cover, and then
slide it toward you.
1 Needle plate cover
g Remove the bobbin case.
Grasp the bobbin case, and then pull it out.
1
1 Bobbin case
h Use the cleaning brush or a vacuum cleaner to remove
any lint and dust from the race and the surrounding
area.
1 Cleaning brush
2 Race
• Do not apply oil to the
a
a
.
bobbin case
i Insert the bobbin case so that the
bobbin case aligns with the
• Align the and marks.
1
mark
2 mark
3 Bobbin case
• Make sure that the indicated points are aligned
before installing the bobbin case.
j Insert the tabs on the needle plate cover into the
needle plate, and then slide the cover back on.
1 Needle plate cover
CAUTION
• Never use a bobbin case that is scratched,
otherwise the upper thread may become
tangled, the needle may break or sewing
performance may suffer. For a new bobbin
case, contact your nearest Brother authorized
service center.
• Be sure that the bobbin case is correctly
installed, otherwise the needle may break.
Care and Maintenance
mark on the
mark on the machine.
a
b
b
a
a
Appendix A-3
A