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When I bought my dozer I did not even know what an open centered valve was but thanks to RONJ on another site I believe I know a little more with emphasis on little. I have to yield to Bob, Leon, Rich et. al. for their vast knowledge.

I look at the open centered valve as a variable restrictor. When you open the valve you divert oil to the cylinder circuit. The more you open the valve, the more oil is diverted. I installed copper disks with 1/16″ holes in my blade tilt cylinder. This gave me the control I wanted but when I open the tilt cylinder valve you can hear the engine coming under load and I am sure the relief valve is working. This and the fact that the copper disk may rupture because of the pressure caused me some concern but the tilt cylinder is rarely used so I am happy with the copper disk restrictor. For a cylinder that is used all the time, I would focus on installing a new control valve. That is only my opinion.

Sorry, meant to say loss not lost. I guess Sigmund would have something to say about that error.

David,

The lost of “our data”  concerns me very much but I take Hal at his word that he will make the old database searchable. For now I am trying to get use to the new site and let Hal make his tweaks.

Phil