Singer 337 - To Remove and Replace Bobbin Case

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To Remove and Replace Bobbin Case
• Open slide plate and remove throat plate
(see page 28).
• Unlock bobbin case by lifting and pulling
holder to right as shown.
Remove bobbin case from machine.
Remove all lint, fluff or other foreign
matter which might clog machine.
• Replace bobbin case so that groove under
tension spring fits on hook raceway and
fork of case straddles positioning stud.
• Push bobbin case holder to left until it
snaps down into lock position.
• Replace throat plate and close slide plate_
POSITIONING
STUD