In Reply to: Jubilee Hydraulics posted by John on November 13, 2017 at 18:19:29:
If the lines going to the pump are not damaged, if you have enough hydro fluid, and the pump is good, you should be able to get it to prime by putting the tractor in a nose down attitude and loosen the plug on top of the pump just so it is loose but don't remove it completely. Fire the tractor up, let it idle slow for a few min and it should get a prime, then when you don't see air bubbles coming out around the threads of the plug, tighten it. Should be all that is needed. Might want to have lots of rags on hand when you do this because some oil will run off pump.
It could be other problems with the linkage or O-Rings on piston, or pump, stuck valve in control body, etc. I'd try to get a prime first.