When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Use a wooden wedge to hold the pulley if you have to, and do like he said...whack it once or twice with a hammer, and then use a big wrench (or channel locks, or whatever) and it'll come off pretty easy.