CRC 2-26. Available at Home Despot... If you pull the switch out from the dashboard you can shoot the cleaner into it from several "openings" in the body of the thing. The lubricant in the motor "wheelbox" can age and stiffen, too, if it just ~sits~. Be nice to it and pull it all apart, clean and service it. You've got lifetime parts there and the "new" replacement stuff available to us thru the "usual suspects" is far, far inferior. I'd fight like a wild thing to maintain the originals rather than take a chance the field winding would be overheated and render'd useless.
...just an ol'[censored]'s opinion. /bcforum/images/%%GRAEMLIN_URL%%/devilgrin.gif