Your usual go-to should help. Remember, those are taper pins holding the shafts in place, so they only come out and go in on one direction. If either side gets peened over, they become harder to remove. With heat, go slow and heat (it doesn't have to be much) the whole casting. Make sure the casting is solidly supported, and a good whack in the right direction should get it going on a pin punch. I was very worried about breaking my casting, but ultimately had to resort to heat with a 3lb hammer. Do not miss and hit the casting.
joe