SINGER W311 - Manual (Page 28)

CLEANING AND OILING THE SHUTTLE
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(See Fig. 55 and 56)
The stitch forming mechanism occasionally becomes
clogged with loose threads and lint, (his will interfere with
the efficient operation of the machine. Cleaning and
removal of the lint will safeguard the performance.
To remove the shuttle assembly, proceed as follows;
1. Turn the balance wheel until the needle reaches its
highest position. Tilt head bock on its hinges.
2. Remove bobbin case.
3. Turn the two shuttle race cover clamps (B) outward Fig. 55
and remove the shuttle race cover (C) and the shuttle
body (D).
4. clean the shuttle race, the shuttle, and shuttle race
cover by removing all threads, lint, etc.
When the cleaning has been completed, proceed as
follows to replace the shuttle assembly:
1. Turn the balance wheel until the needle reaches its
highest position. F'S-
2. place shuttle body, (D), in race against shuttle driver and adjust into position.
3. Replace shuttle race cover, (C), fitting pin at lower edge into notch, and lock
cover Clamps, with shuttle race
into position.
4. Put bobbin into bobbin case.
5. Put the bobbin case into the shuttle
into position
(B) , making certain the clamps have been snapped securely
fitting tongue into notch E of race cover.