Brother Computerized Sewing and Quilting Machine operation manual 139, Cleaning the Bobbin Case

CARE AND MAINTENANCE

iInsert the bobbin case so that the projection on the bobbin case aligns with the spring.

a

b

b

a

aProjection

bSpring

jInsert the tabs on the needle plate cover into the needle plate, and then slide the cover back into place.

a

b

aNeedle plate cover

bTabs

Note

•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 (part code: XC3153-151), contact your nearest authorized dealer.

•Be sure that the bobbin case is correctly installed. Otherwise, the needle may break.

Cleaning the Bobbin Case

Thread wax and dust easily collect around the notch in the tension spring on the bobbin case, resulting in an incorrect thread tension. Therefore, the bobbin case should be cleaned as necessary should tension problems arise.

When cleaning the bobbin case, use business card stock or another type of paper of similar thickness and sturdiness in order to prevent pieces of paper tearing off and getting lodged in the bobbin case.

aFollow steps from “Cleaning the Race” on page 138 to remove the bobbin case.

bUsing a piece of paper of adequate thickness and sturdiness, slide the paper between the tension plate base and the tension spring and also slide the paper behind the notch of the spring to remove any dirt or dust.

a

d

c

ab d

e

aTension plate base

bNotch

cPaper (e.g. business card type)

dTension spring

eBobbin case projection (stopper)

Memo

Do not bend the tension spring. In addition, do not use anything other than recommended paper to clean the bobbin case.

cUse the included cleaning brush to remove any lint and dust from inside the bobbin case.

dReinsert the bobbin case and needle plate cover assuring the bobbin case projection (stopper) is touching the bracket spring.

6

Appendix

139