Trouble chart – SINGER W4042 User Manual
Page 61
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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.19, R7, 8
i
Lower thread tension too tight
P.56, 57
'
Lint stuck in the bobbin case and inside the tension spring
Remove lint and dust
with a cleaning brush
Skipping stitches
Needle not fully inserted or inserted incorrectly
P.22
Needle bent or burred
P.22
i
Size or type of needle and thread not suitable for the material
P.24
Incorrect upper threading
P.7
Too much lubrication on the machine
P.50
Irregular stitches
Incorrect size of needle for the material
P.24
Upper thread tension too loose
P.16
incorrect lower tension
P.56, 57
Fabric is not fed
correctly
Pattern selection dial not set correctly
Feed teeth are down
Lint stuck on the feed teeth
P.26
p.48
R49
Noisy machine
Check for thread in shuttle, the slightest amount of thread in
shuttle may cause noise or binding, use cotton swab to dean.
P.49
P.58