When you turn the steering wheel do you feel any surge on the steering wheel at all? When you release pressure on the steering wheel does it move back against the direction you are turning it a slight amount?
Does your tractor have a separate PS pump or does it use a priority flow divider valve?
If it has the flow splitter try operating the power steering while holding the valve for the lift arms in the raise position, continue to hold the valve while the lift arms are stalled out in the maximum raised position. If the PS works while the arms are stalled out and still have pressure applied that indicates a bad regulating valve in the flow divider section of the valve , that is the first valve section on the left side of the valve bank of valves.
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Today's Featured Article - A 1937 John Deere Unstuck - by Gary Hickman. Here is my story of how I got the pistons out of a 1937 JD B that the engine had been stuck for about 14 years: About 12 years ago my Dad gave me one of the tractors I ran as I was growing up on our farm in central Nebraska. The engine on this tractor, a 1937 John Deere "B", had been stuck for 2 years before he gave it to me. This last spring (1999) I hauled the tractor to our 2 acre lot in St. Libory Nebraska where it joined my antique machinery collection, at that time a 1929 Caterpillar T
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