That system looks like one Fred Flintstone might have used! With a little creative plumbing you could probably retro-fit it for a more conventional 3-position valve that recycles the fluid back into the reservoir when it's in the center position, like the control valves on a log splitter or another hydraulic powered device.

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
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