Hello. I am trying to replace the rear rubber drive pully on a porter cable 352vs belt sander. (4" x 24") I have removed the "nut" and "washer", but still won't come off. I'm sure it's being held on the "shaft" by a "key". Does anyone know how to get this drive pully off??? I'd really appreciate any help! Thanks a million!

Kevin:

http://images.toolpartsdirect.com/sc.../352vs.big.pdf