Thank You all for the responses I appreciate them, here is what I think I know about all of this,
I have to turn the float switch on my tractor to run auxiliary hydraulic outlet , the control valve in question has 2 spools one controls a top link simple in and out second one hose is permanently screw on the bottom of the long cylinder that lifts the carriage of the forklift attachment, and the top line I figured is a dump line of the oil but the pressure of that line is not very high depending on the weight of the load on the fork lift, I ave tried to tee 2 return lines in tho back of the tractor no good, there is a pressure circulating in that line that will not allow to dump the oil, my understanding is that if the valves are closed the oil still circulates through the control valves (passing by waiting to be used) I have a spare quick connect female that I have attached to that hose in question and pointed in to my filling tube (where you add hydraulic oil) and was operating the valves and everything worked perfect goes up and down no problem, now I just have to find a place on the valve or tractor where there is a no pressure dump possible and is all good or I can change the piston on that valve to act as a single stage valve which will be hard since I can't find any info on the star hydraulic (maker of this control valve)
Paul.W