Most likely your problem is a scored relief valve but it is possible that you may have some debris in the foot-n-inch valve.
The foot-n-inch valve is a pretty simple valve so it certainly would not hurt to check it out. It has a control stem, a spring, some shims to set the pressure, and a poppet valve to seal against the seat. The pedal return spring has to be strong enough to fully return the the control stem when the pedal is released. Once the stem is seated the amount of shims sets the opening pressure.
The relief valves are not too difficult to access. The are contained in the center section and are accessible after after removing some covers on the side of the housing. The tractor does not have to be split to service them.
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Today's Featured Article - Pitfalls of Tractor Engine Rebuilds - by Chris Pratt. The first pop after you have put the machine together with your own hands is exciting and pleasing. The whole experience can be marred if one moves too fast and makes too many assumptions that they can just use "as is" some parts they should be closely scrutinizing and possibly attended to. In such cases, rework makes what could have been a fun project turn into an irritant or even a nightmare. Minor Irritants To give you an example of an minor but irritating proble
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