I guess I did not explain my self well enough. The plungers are all the same size except some are smaller in diameter on the bottom end, closed end of plunger for maybe half an inch. That was the mix up in parts.
So, they only come in one size but one style has a smaller end.
And, like I said before, the side clearance is the important thing. The end cover problems are normally on the smaller tractors that used the pot medal end cover and it warps. Sure, you want a smooth end cover and minimum end clearance but when the shaft right above the gear is worn, you will have poor oil pressure at low rpm, warmed up. If you can move that gear back and forth, shaft is worn.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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