A few questions--The entire stator assembly looks like its plug n play----What exactly is involved in just swaping out the lighting coils?  It looks as if it is secured with two screws and a lead wire.  How is the copper wire removed and attached---Is it just cut and soldered or is it secured with a set screw.

Also what exactly does the third "yellow" coil do.  I believe it is called a source coil.    Just wondering on a 25 year old machine if I would be better off replacing entire stator---or  if it aint broke dont touch it.