SINGER 15-91 User Manual
Page 34
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HINTS
Machine Working Heavily.
If the machine
runs hard after standing idle for some time, use a
little kerosene in the oiling places, run the machine
rapidly, then wipe clean and oil.
To Avoid Breaking Needles.
See that the
presser foot or attachments are securely fastened by
the thumb screw. Do not sew heavy seams or very
thick goods with too fine a needle. A large needle
and thread to correspond should be used on heavy
work (see inside cover page at back of book).
See that the needle is not bent, and avoid pulling
the material when stitching.
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Breaking of Needle Thread.
thread breaks it may be caused by:
If the needle
Improper threading.
Tension being too tight.
The thread being too coarse for size of needle.
The needle being bent, having a blunt point,
or being set incorrectly.
Bent thread take-up spring.
Breaking of Bobbin Thread.
If the bobbin
thread breaks it may be caused by:
Improper threading of bobbin case.
Tension being too tight.
Skipping of Stitches.
The needle may not be
accurately set into the needle bar or the needle may
be blunt or bent. The needle may be too small for
the thread in use.
Free Instruction
for using the machine is gladly
given at any Singer Shop.