Sir, The buzzing sound you are hearing and heat you are generating is a high pressure leak inside that valve. The leak can be a packing/oring seal leaking to possibly one of the two pressure valves out of adjustment or a failed pressure valve that is not seating. Any repecal JD mechanic can perform this common repair and adjustment procedure. Have the valve rebuilt. I could do it in a short order if I had it in my shop. Been rebuilding these on a regular basis since 1977.
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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