I own a Deutz Allis 612H. This is the same tractor as the Simplicity 4212H. The valve stem leaks at the wheel. I want to be certain that I use the correct replacement valve stem. The leaking, Dill TR412 valve stem that I removed from the wheel may not be the correct valve stem. I have the simplicity parts manual and it says that the correct valve stem is Simplicity part number 2172353SM which has been replaced by STMCPTR41 SE. I have visited the NAPA website and looked for a cross reference. The Simplicity part numbers are not cross-referenced. Should I replace the valve stem with a TR412? Advise.