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Re: Float on remote?

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Fritz Maurer

12-19-2012 05:12:52

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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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Larry NCKS

12-19-2012 05:43:10

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 Re: Float on remote? in reply to Fritz Maurer, 12-19-2012 05:12:52  
I don't believe you can open that valve too far. I don't think it will screw out of the body with removing some sort of keeper, either a set screw in the side or a snap ring.

As to Fritz' description, I don't entirely agree. If you don't open that valve for a single acting (one hose) cylinder, the hydraulic system will be putting full pressure against that 2nd port with nowhere for it to go except relief valve.

As to the front plug, I'm not sure what that might be unless it's an alternate for one of the other two.

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Fritz Maurer

12-19-2012 17:18:11

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 Re: Float on remote? in reply to Larry NCKS, 12-19-2012 05:43:10  
Larry, I think you may be right. I'm wondering, how does the oil get out of the cylinder through that needle valve, combined with the flow from the pump? Is it possible there is a float position on the spool, and that knob is actually a FLOW control?

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12-19-2012 18:55:36

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 Re: Float on remote? in reply to Fritz Maurer, 12-19-2012 17:18:11  
This valve has blue paint under red. Wondering if it possibley came off a thousnd series.

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