SINGER 3214 User Manual
Page 45
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7. TROUBLE CHART
PROBLEM
PROBABLE CAUSE
CORRECTION
Breaking lower
thread
Thread not wound evenly on the bobbin
or not drawn up correctly
P. 5
Lower thread tension too tight
P.18
Lint stuck in the bobbin case and inside
the tension spring
Remove lint
and fluff with a
cleaning brush
Skipping stitches
Needle not fully inserted
P.16
Needle bent
P.16
Size or type of needle and thread not
suitable for the material
P.17
Incorrect upper threadin
P. 8
Too much oil on the shuttle.
P.39
Irregular stitches
Incorrect size of needle for the material
P.17
Upper thread tension too loose
P.18
Incorrect lower tension
P.41
The material not
feed correctly
Pattern selection dial not set correctly
P.11
Incorrect feed dog height
P.38
Lint stuck on the feed dog
P.39
Noisy machine
Check for thread in shuttle area, the
slightest amount of thread in race may
cause noise or binding, use material
like tooth pick or cotton swab to
clean.
P.40
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