You can't plumb into the "input" side and make it work, because it's an "open center" system, meaning when the valve spools are centered, the oil is constantly flowing through the valve from pump to sump. There is virtually no pressure on the input port until you move a valve spool to push a cylinder ram. The "power beyond" option takes the return port and allows any unused flow to be used on any remaining open center valve spools in the system, such as your fast hitch. This is called a series connection. Trying to put two open center valves in parallel won't allow either to work, as there will always be a loop flowing to the tank from one or both valve blocks.
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Today's Featured Article - Harry Ferguson - The Man & The Machine Harry Ferguson was christened Henry George but every one called him Harry. Harry was born in a small Irish town called Growell in County Down about 16 miles from Belfast. Harry Ferguson led a varied and colorful childhood causing mischief where ever he could. He showed mechanical aptitude at a very early stage in life and showed no inclination towards
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