Posting a picture John although not as clear as I would like. Lever that has several white marks pushes the 2 pins just above the two single white marks when the control lever is pushed forward. Can just see the shiny ends I think. Pins push balls off a seat to let hydraulic fluid come back to the unit from the ports. Pressure pushes the balls off the seats when pumping into the lines. Unless the pins are pushed in fluid is not supposed to flow back after a load is on the cylinder. When the control rod is stopped on the catch bump its usually several inches from pushing a pin in. Also the more load thats on a cylinder the harder it gets to push the ball or balls off the seats when pushing the rod forward. If the unit won't stay up the balls are leaking or a internal leak. Or maybe the linkage is keeping the pins pushed in, kind of doubt it though. Wonder if dirt, metal cuttings, teflon tape, ETC. got into the ports when changing and is now keeping the balls from sealing.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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