I'm having a go at my car's ball joints. I got the knuckle off without too much trouble, but now that I am trying to press out the lower ball joint, I seem to be getting nowhere. I have a press, with the screw pressing down on the "top" of the ball joint, with a cup pressing against the control arm from below. At a certain point, I cannot turn the screw on the press no matter what, and the ball joint hasn't moved one bit.
As far as I can tell, this is the correct arrangement; it matches both the diagram provided in the packaging in the press, as well as a document for a 2010 crown victoria, which I understand to have the same suspension (and it sure looks like it):
I am certain I have removed the snap ring, and everything else looks to be correct. Am I misunderstanding anything about how the ball joint press works? Is there some step I am missing? Am I misunderstanding how much force I need?