confusing Hyd problem

MT in PA

Member
I'm having a confusing Hyd problem and could use some help.

I have no draft control on the quadrant. The only way I can get the 3pt to move is by moving the HYD selector (the one under the seat) from neutral to the back position. In the forward position it switches the HYD to the loader. Its a dual control valve with only one side plumbed. Somewhere the two are connected because the unplumbed valve will move back to neutral when the other valve is operated if under load.
When the valve is held back the 3pt will rise until I move back to neutral. It will hold position fairly well until any one of the valves is moved including the loader controls. The quick fix is to disconnect the loader hoses and move the 3pt into position with the valve. Quadrant position still seems to have no effect.

When operating the loader (valve in forward position) the 3pt will rise to max position before the loader will move.

Any suggestions on where to begin looking?
 

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