I'm in the lengthy, money pit of a process, of restoring a 1967 John Deere 3020 tractor.  The current focus is to repair the two hydraulic remotes on the back.  One won't allow the hoses to connect, while the other leaks.  The tractor had sat outside many years, so like most things on it, I imagine both remotes should be tore down and rebuilt. 

Anyways, my questions are, is there anything special about taking these off, and putting back on?  Just the two top line connects, and the two mounting bolts?  Does JD have a rebuild kit for them?  I think I have a guy that will rebuild them for me, as he knows well how to do it, as long as I can get them off, and over to him.

Picture attached of the rear of the tractor.