SINGER W2135 - Manual (Page 26)

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4. Clean the shuttle race, the shuttle, and shuttle race cover by removing all threads, lint, etc.
5. Apply a drop of oil with finger tip to outer edge of shuttle.
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.
2. Place shuttle body, (D), against shuttle driver and adjust into position.
3. Replace shuttle race cover, (C), fitting pin at lower edge into notch, and lock into
position with shuttle race cover clamps, (B), making certain the clamps have been
snapped securely into position.
4. Put bobbin into bobbin case.
5. Put the bobbin case into the shuttle race, fitting tongue into notch E of race cover.
CHECK UP FOR SMOOTH SEWING
Although your sewing machine is designed for maximum efficiency, should any of the
following difficulties occur they can be remedied with minor adjustments.
Upper Thread Breaks “
Be sure needle is inserted properly.
Check on correct way to thread machine.
^
Use correct needle size for thread.
Do not have upper tension too tight.
Lower Thread Breaks
Check correct method of threading bobbin case.
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