Machine stopped in spin cycle and smell of burnt plastic.

Removed pump/motor assembly. Had a difficult time removing pump from motor. Was not aware that the shaft was not connected some way! After looking over the internet for help....I finally realized that the shaft was siezed in the pump. After much persuasion on my part....it broke loose... I did use some WD-40....but don't know if it....or my prying between the pulley and the pump finally did the trick. Found that the idler pulley was seized. When I replaces both belt and pulley... It worked fine...