Posted by Owen Aaland on May 28, 2014 at 21:20:56 from (216.47.33.5):
In Reply to: Super C hydraulics posted by jhilyer on May 28, 2014 at 13:44:55:
It is a double acting check valve used to keep the cylinder on the Fast Hitch from settling with a load on it. When the control valve is in not directing oil to the hitch both check balls are seated sealing off the cylinder from the valve. When the control valve pressurizes one side that ball is lifted off the seat to allow oil to pass. At the same time it moves a small piston in the block between the check balls which unseats the other ball allowing oil to pass back to the control valve. By controlling how much oil is sent to the cylinder you also control how much the other ball becomes unseated allowing you to control the speed even with a load on the cylinder.
Unless something is broken it is just a matter of replacing the O-rings to reseal it.
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