One of the control arms was replaced with a rebuilt unit a few years ago, the other had many more years on it and put up a big fight in replacing the ball joint. First step in replacing the old ball joint is getting the old one out.
Clean inside out.
Insert new cup.
Assemble pin, cup, spring, and o-ring:
Compress the spring with stand-offs and insert the spiral circlip. Install the grease nipple. The boot is the last step.
That was easy, now let's have a look at the older arm. It was quite corroded, and we tried to clean it up as best we could before installing the new brass cup. Unfortunately After closer inspection, the groove for the circlip is not just full of crud, but also quite corroded and not really trust worthy for a ball joint. We may be doing this job again on a fresher control arm in the near future.