Is a special fixture needed to press in 107 Ball Joint?
 

My ball joint press fit perfect over the ring on the bottom of the A-arm to press out the ball joint. But pressing it in, there is no flat surface. Is anything special needed? How is this done? I have a 40 ton hydraulic press at my disposal but I don't want to mess anyting up.

FYI - The solution, blocks and 30 tons.
 

I had to set some steel blocks to support 3 points and use a part of the ball joint press to push the ball joint. I didn't want to push in the center, only on the outside.

I can set the press to different tonnages. It is a hand pumped press. I set it to 30 tons and as I pumped it went almost to the bottom. I switched it to 20 tons to make sure I didn't use too much force and it wouldn't go. I set it back to 30 tons and it went in and seated. This job takes 30 tons.