Remove zerk
Thread in 3/16" or 1/4" whatever right size bolt that's 1 1/2" long, full thread
Expand full circle clip w c clip pliers and work out of cap groove without fucking it up. Or fuck it up to remove it and replace it on reassembly
Remove cap from cross by threading bolt into hole, bottoming against cross and using the hardened cap threads to draw the cap out.
No pressing, no bottoming.