The viscosity recomnendations from Deere that jdemaris showed seem to indicate that some fading was expected, why else heavier oil at higher air temperatures? As bison indicated any fading will be magnified by a worn pump. Does it have a hydraulic oil cooler? If so, check to see if it's clean. It's all about keeping a constant oil temperature. The newer generations of tractors seem to do a much better job of this. For comparison, long ago my first loader tractor was a 1956 Oliver Super 88, it did not have a hydraulic oil cooler. Working steady on a manure pile, over the course of a hot afternoon, it would slow down a LOT! LOL. The good old days!
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Today's Featured Article - A Lifetime of Farm Machinery - by Joe Michaels. I am a mechanical engineer by profession, specializing in powerplant work. I worked as a machinist and engine erector, with time spent overseas. I have always had a love for machinery, and an appreciation for farming and farm machinery. I was born and raised in Brooklyn, New York. Not a place one would associate with farms or farm machinery. I credit my parents for instilling a lot of good values, a respect for learning, a knowledge of various skills and a little knowledge of farming in me, amo
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