When the cylinder was dry enough to handle I installed it on the saw and connected the fittings except for the fill screws at the top of the cylinder. I filled the system with fresh hydraulic oil and closed it up. With the control valve open I raised the head, I then closed the valve, the head remained locked in the raised position. Checked for leaks, everything good, cracked the valve open and the head slowly started to lower onto the vise base, open the valve wider, feed speeds up, cut the valve back, feed slows down. Great, the feed works perfectly. Here are a few pictures.
The control valve.
I will install the counterweight spring next to make the head easier to raise and take some load off the hydraulic system and continue from there.