Issue Cause(s) Solution
Thread is breaking. Bobbin inserted incorrectly Check bobbin is the correct
direction in the case and
inserted rmly (clicked) into the
machine (page 29).
Debris on tension discs Clean the machine (page 51).
Burred bobbin Check bobbin for sharp edges.
Contact your dealer to replace if
needed.
Needle plate is rubbing needle Check that needle plate is
centered and does not hit
needle (page 62).
If problem persists, please contact a Grace Company support
technician. Call (800) 264-0644.
Machine is running loud. Machine and/or hook assembly
needs oiling
Oil the machine and hook
assembly (page 51).
Bobbin winder is on Check that bobbin cam is o
(away from bobbin stand).
If problem persists, please contact a Grace Company support
technician. Call (800) 264-0644.
Thread is bunching up in
hook assembly (bobbin case
area).
Bobbin wound or threaded
incorrectly
Check that the bobbin was
threaded correctly and inserted
the correct direction in the case
(page 29).
Machine improperly threaded Check that all tensioners and
guides were threaded (page
31).
Incorrect thread tension Adjust top thread tension (page
44). Adjust bottom thread
tension (page 29).
Bobbin case has damaged or
missing spring
Check inside bobbin case to see
spring. Contact your dealer to
replace if needed.
If problem persists, please contact a Grace Company support
technician. Call (800) 264-0644.
Appendix
87
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