My opinion, so take it for what it's worth. The 303 was the designation used by John Deere for many years. Maybe still do, but the 303 seems to have become more or less generic for hydraulic fluid. I am using 303 in the live hydraulics system I installed on my M, and it performs just fine. My opinion again, but I really don't think there is much difference at all between 303 and Hy-Tran. If I owned a newer tractor still under warranty, and it called for Hy-Tran, then that is definitely what I would use. A tractor built in 1975? I think I would use the 303.
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Today's Featured Article - The Ferguson System Principal An implement cutting through the soil at a certain depth say eight inches requires a certain force or draft to pull it. Obviously that draft will increase if the implement runs deeper than eight inches, and decrease if it runs shallower. Why not use that draft fact to control the depth of work automatically? The draft forces are
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