This is what a 201 motor looks like once it has been removed from the machine.
Remove the housing by unscrewing the little screws and gently wiggle it away from the motor. Be careful.
Then you get this
Then the armature comes out
And it looks like this. This is a cleaned up version with the worm reattached for safe keeping' you can see the windings are a bit stained. Oh well. Also this armature had been varnished, I guess at the factory, and that brown glaze won't come off with cleaning.
Once the field coil has been removed from the housing it looks like this
The grease wicks and brushes are removed to service the motor as well.
Brushes are carbon rectangles attached to springs. They glide into brush tubes and rest on the commutator
There is a very comprehensive tutorial on how to re-wire a potted motor on The Vintage Singer Sewing Machine Blog http://vssmb.blogspot.com/ Go there for all you need to know.
Stay tuned here for more fun with Kenmores