Having never attempted this, it's difficult to say what your success might be, but in general pulleys require a pulley puller, like for working on car engines. This assumes it's a press-fit pulley. Hopefully the pulley is metal. It'll cost you if you can't find a friend that has one.

Good luck!

Edit a bit later... In retrospect, that looks like it's threaded on there. Your guess is better than mine...