87
Issue
Cause(s)
Solution
Thread is breaking.
Bobbin inserted incorrectly
Check bobbin is the correct
direction in the case and
inserted firmly (clicked) into the
machine (page 31).
Debris on tension discs
Clean the machine (page 55).
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 66).
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 55).
Bobbin winder is on
Check that bobbin cam is off
(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 31).
Machine improperly threaded
Check that all tensioners and
guides were threaded (page
33).
Incorrect thread tension
Adjust top thread tension (page
50). Adjust bottom thread
tension (page 31).
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