Posted by kens46wdx on Sunday, April 20, 2008 at 10:55:48 :
I was rebuilding a model 77 fresh air truck heater for use in my WDX. The electrical motor was shot. Napa had a replacement in stock that worked great (pn 655-1020). It cost about $25 plus tax. The mounting screws needed to be trimmed and the "flat" on the shaft had to be ground so that it went a little lower on the shaft (closer to the motor). Easy to do with a dremel tool.