While you wait for answers, we may have found some information which could help you.
Click here for Mixer Turn Hotkitchenaid mixer model k5m90wh?
kitchen aid 550 professional burned up motor?
how to replace the power cord on a kitchenaid K5-A ?
Kitchen Aid - speed lever?
How to disassamble kitchenaid KSM90 mixer?
How can I fix the coupling Kitchenaid blender KSB5SS0B3?