It took 17 tons on my left side brake hub. I cut off the clutch hub because I didn't trust the hub threads that that grade 8 studs were screwed into over 25 tons. I pressed them both back on at 10 tons which I think is adequate even though it's less than the Cat specification. All new hubs and plates, springs and retainers; I'm not going back in there....
The trick is to have appropriate tools including adaptors for the various pressing operations - then it's easy. My main tool is a 20 ton hollow ram with a pressure gauge on the hand pump. I had my guy turn down various adaptors so I could press safely and correctly - he only seems to charge 20 dollars per piece which I think is a good deal