Heat would do it, but remember the downside of heat is the molecular changes you are making to the metal. There is always a downside, so thats an acceptable way to do it.
I used a 20 Ton shop press and an appropriately sized punch. Do like Steve says and cut off both ends flush center the proper punch, and push it out. Remember there is an oil hole in the middle of the hinge that you can squirt some PB Blaster in to.
Patience is key. If that doesnt do it, use a center punch and dont screw up! Make sure you punch it in the VERY center. LOL! I dont think I have EVER been able to get it perfect, drill a 1/4 inch hole clear through. This should relieve alot of the pressure so you can use the press to get the rest out. If not, step up the drill sizes never going higher than 'R'.
If you can do that, you are ready to tackle all sorts of fun stuff, so be happy and proud of yourself if you pull it off!
The cross vise is really a good thing to have. Good luck!
