Got it back together. Works much much better. The boom is still a little droopy but it is actually usable now. I hope at least part of the remaining droopiness is just air in the lines as I only lifted the boom a couple of times before latching it and putting the tractor to work moving a parts car. Even in the remaining droopiness doesn't go away, I would be happy with the way it is for a few years at least. Here is
Discuss this in the forum topic Case 580B Weak boom rams.