Class 99 & 99K Sewing Machines - Sew-Classic.com
Class 99 & 99K Sewing Machines - Sew-Classic.com
Class 99 & 99K Sewing Machines - Sew-Classic.com
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<strong>Class</strong> <strong>99</strong> & <strong>99</strong>K<br />
Breaking of Needle Thread Might be Caused by:<br />
1. A knot in thread.<br />
2. Improper threading -- see page 13.<br />
3. Upper tension is too tight -- see pages 22 - 23.<br />
4. Needle not pushed up as far as it will go into<br />
needle clamp -- see page 12.<br />
5. Needle blunt or bent.<br />
6. Thread too coarse for needle -- see page 11.<br />
7. Roughened hole in throat plate.<br />
8. Improper arrangement of threads to start sewing -- see page 18.<br />
Breaking of Bobbin Thread Might be Caused by:<br />
1. Improper threading of bobbin case -- see pages 17 - 18.<br />
2. Bobbin thread tension too tight -- see pages 22 - 23.<br />
Skipping of Stitches Might be Caused by:<br />
1. Needle not pushed up as far as it will go into<br />
needle clamp -- see page 12.<br />
2. Needle blunt or bent.<br />
3. Needle too small for thread -- see page 11.<br />
If machine runs heavily after standing idle for a long period, apply a few drops<br />
of paraffin at all oiling places, run machine for a few minutes, then wipe clean<br />
and oil the machine -- see pages 9 - 10.<br />
Page 30<br />
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