Thanks, Destroked. I do understand the difference. In your second diagram, the plug they used is the one I needed to use my power beyond. That's what was throwing me. But after a couple of discussions with Harry, at Cross Mfg, they convinced me it is the way this 2 spool is designed. What isn't shown in the second diagram is a port directly below the head of the ''open center passage'' arrow, with a plug in it, and ''BYD'' stamped next to it on the outside of the valve. I plumbed my second valve to this port, and inserted the required ''closed center conversion plug''. I do understand that I could have used a power beyond sleeve, as shown in your 3rd diagram, but that would have run the flow out the side of the valve, instead of out the top with all the other ports. My valve is a SDV series 2 spool, not the BA and BC series these diagrams were designed for. Thanks for the good info. It may help others understand the differences between closed and open centers. steve
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Today's Featured Article - Antique Tractor Wiring Basics - by Curtis von Fange. One of the most neglected parts of old tractors is the wiring. After sitting in the elements for half a century or more much equipment wiring has deteriorated to sparsely covered strands of copper or other metal. Plastic insulation has cracked, mice have eaten through the older clothed style coverings and the exposed wires have reacted to winter moisture and salts by turning blue and powdery. Terminal ends have corroded, rusted or just plain evaporated away. Aged wires not only keep an engin
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