Be careful in these situations! I watched a safety movie in the service where two people, in two separate incidences, were killed when the drive sprocket on a crawler popped of the hub unexpectedly.
Stephan, I fought to pull a bearing race off a hub and run into the same problems you encountered. Destroyed one puller and got a bigger one to do the job. Still it didn't work. Heat, cold, pounding and prying. I was standing there thinking I would never get it off when all of a sudden a loud bang happened. The puller and race popped off the hub like a bullet and landed 15 feet away. If I was in the way it would have broke my leg, or legs.
Moral of the story, When working with high tension and pressure forces be most careful.