Does the power steering work OK yet even when the rest of the hydraulics doesn't? If the steering still works and the hydraulics do not, the priority valve has shut off the rest of the hydraulics. As JDSeller has stated that occurs at about 1700 psi. When a sudden drop in pressures happens, but you still have steering, the stroke control valve gets hung up and won't allow full pressure. When this occurs, I remove the stroke control valve, start the engine for a few seconds, thoroughly clean the stroke control valve and reinstall the valve. It does not take much of a flake of anything to hang up the stroke control valve. I suspect when you serviced the tractor, something broke loose and lodged in the stroke control valve.
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Today's Featured Article - An Old-Time Tractor Demonstration - by Kim Pratt. Sam was born in rural Kansas in 1926. His dad was a hard-working farmer and the children worked hard everyday to help ends meet. In the rural area he grew up in, the highlight of the week was Saturday when many people took a break from their work to go to town. It was on one such Saturday in the early 1940's when Sam was 16 years old that he ended up in Dennison, Kansas to watch a demonstration of a new tractor being put on by a local dealer. It was an Allis-Chalmers tractor dealership,
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