Kind of tough to do. There is an on the car ball joint press. i.e OTC-7249 i don't know if any of the Parts stores rent it. There are specific adaptors for various makes and models.
+1 on the heat and C-clamp. Pain in the ass, but works. Or rent a press. If you were closer to me I have a shop with a press I can use. Take it to a shop and see. Should only charge you a few bucks.