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