Jeff, if you have a shop manual, it describes a hydraulic pressure test for the PTO clutch pack.
One more test for worn splines on pressure plate, engage the PTO and if the tractor has remote hydraulic outlets, dead head the remote outlet and listen for relief valve buzzing, engine being lugged down and watch to see if PTO stops. If the relief valve stops buzzing and the PTO stops, the splines on the pressure plate that drive the PTO shaft could be worn out but still have enough grip to drive the hydraulic pump but not a PTO driven implement.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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