970 Case hydraulics

JBobbe

Member
I have a 970 Case with Powershift. Currently, I have a Case 90 loader on it which operates off the rear hydraulic couplers. This makes it in convenient to put anything on the 3 point that needs hydraulics. I know there is a hydraulic hose the comes out the side of the pump?and goes back to feed the rear couplers. Is there a way to tap into that hose to feed additional spools and valves for controlling the loader the loader freeing up the rear coupling for implement use? I've read somewhere about adding a joystick in the cab to operate the loader. Any advice would be appreciated. If all there is to it is rerouting that hose, I assume with some type of bypass to feed the rear couplers, it doesn't look too difficult to do.
 
The only correct way to put a valve in the main pressure line is to get a valve with Power Beyond capabilities, this valve would have an inlet, an outlet and a valve drain to put oil from that valve relief and internal leakage back to sump. If you put a valve inline not so equipped any time you use main tractor hydraulics you are pressurizing every square inch of the valves internals, valve spool seals are not designed for system pressure and are always on the drain or low pressure side.In addition to that if you put 2000 lbs through a standard valve you are backing that pressure up on the back side of the relief valve effectively raising its pressure by that amount!!!!! if the wrong combinations of valves were to be used at once the pump could be forced to produce 4000 lbs which would in all likely hood split it wide open.

This subject causes much dispute on here even with my good friends, hydraulics,has been my life, working on every series since Case has been selling hoes and I am not an amateur on here giving advice. Many are going to tell you it's ok so proceed as you wish.


If Power Beyond valves were not a necessity they would not be built.
 

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