The DPCV is a load holding device that blocks the cylinder ports when the valve is in neutral. When you shift your remote valve it over comes the spring-loaded check valve. It is suposed to prevent the cylinder from "creeping" if the tractor valve is worn. I had previously used my remotes for my loader before I plumbed in a loader valve. I did not notice much "creep".
I am wondering if this is really nessecary? You have a 544 which is an older tractor. Do you have "creep" issues? I am unsure of this particular unit. It has metric fittings and most likely from Europe. I am not sure if it can be used in the float position if required. I can get a good quality unit cheaper that is made in the USA.
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Today's Featured Article - Oil Bath Air Filters - by Chris Pratt. Some of us grew up thinking that an air filter was a paper thing that allowed air to pass while trapping dirt particles of a particles of a certain size. What a surprise to open up your first old tractor's air filter case and find a can that appears to be filled with the scrap metal swept from around a machine shop metal lathe. To top that off, you have a cup with oil in it ("why would you want to lubricate your carburetor?"). On closer examination (and some reading in a AC D-14 service manual), I found out that this is a pretty ingenious method of cleaning the air in the tractor's intake tract.
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