I have been a member for awhile now but seldom post. Normally every time I need to know something I can find the answer by using the search feature. Well I had to pull my clutch fan off the other day. I didn't have the fancy pulley holding tool and I could not keep the pulley from slipping on the belt. I finally took out a big hammer and a long chisel and gave it a couple of whacks in the direction it needed to go and it spun right off. Just thought I would make a post and might be able to help someone else out when they use the search.
CWB

 

Even though I have the fancy tools for removing the fan I always start out with a couple whacks just as you did.
Without the whacks sometimes they don't break loose with just the wenches.

 

Have had to use an air hammer at times..Glad to see I'm not the only one..

 

Yep, air chisel, quick shot knocked it loose

 

Dab a booger of some antiseize on the threads to make the next removal much easier. Don't worry about it spinning loose as a result, the way the threads run, normal engine/fan rotation keeps things tight.