Like Jiminny says probably low in oil and has picked up some air. Before you start tearing everything apart, start it full of oil and at an idle crack the hose at the motor to let the pump push the air out. Keep the oil level full in the reservoir. Filter change wouldn't hurt either before you bleed the air out. Air in the system causes surging and an increase and decrease in the seed tank pressure. Hope this helps.....Ron
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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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