SINGER 6510 Scholastic - Manual (Page 51)

□ Maintenance
Attention:
Disconnect the machine from the wall outlet before carrying
out any maintenance or changing the sewing light bulb.
Cleaning
If lint and bits of thread accumulate in the hook, this will
interfere with the smooth operation of the machine. Check
regularly and clean the stitching mechanism when necessary.
A. Bobbin holder
1. Remove the bobbin cover plate and bobbin.
2. Clean the bobbin holder with a brush.
B. Hook race and feed dog
1. Remove the needle, presser foot and holder.
Remove the bobbin cover plate and bobbin.
Remove the screw holding the needle plate and remove
the needle plate.
2. Lift up bobbin case and remove it.
3. Clean the hook race, feed dog and bobbin case with a
brush. Also clean them, using a soft, dry cloth.
4. Replace the bobbin case into the hook race so that the tip
(a) fits to the stopper (b) as shown.