Posted by Fritz Maurer on December 19, 2012 at 05:12:52 from (22.214.171.124):
In Reply to: Float on remote? posted by gunny2 on December 18, 2012 at 21:24:07:
Float is automatic on single-acting hydraulic systems by virtue of simply letting the oil out of the cylinder. Float on double-acting systems connects both ends of the cylinder so the oil can flow to either end of the cylinder as the rod moves in and out. This is accomplished by a third position on the spool that allows free flow of oil to either end of the cylinder and free bypass flow from the pump. In your case, it appears that you have a regular two-position spool that locks the cylinder in neutral, and you obtain float by opening the needle valve. One full turn should be plenty. If you only have one line, (gravity-drop, single-acting) opening the needle valve will have no effect. (there's no place for the oil to go, the other port is plugged)
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