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CARE AND MAINTENANCE
Appendix
139
6
i
Insert the bobbin case so that the projection
on the bobbin case aligns with the spring.
a Projection
b Spring
j
Insert the tabs on the needle plate cover into
the needle plate, and then slide the cover
back into place.
a Needle plate cover
b Tabs
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.
a
Follow steps from “Cleaning the Race” on
page 138 to remove the bobbin case.
b
Using 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 Tension plate base
b Notch
c Paper (e.g. business card type)
d Tension spring
e Bobbin case projection (stopper)
c
Use the included cleaning brush to remove
any lint and dust from inside the bobbin case.
d
Reinsert the bobbin case and needle plate
cover assuring the bobbin case projection
(stopper) is touching the bracket spring.
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.
a
b
b
a
a
b
Memo
Do not bend the tension spring. In addition, do not use
anything other than recommended paper to clean the
bobbin case.
c
b
a
d
a
d
e