Just looked up the specs, the orfice size is .406 for that series of engines and .277 on the german diesels. It does show 5.5 inches of water as max. I have checked many over the years and they do vary quite a bit even on engines that are performing well but it is still a very good indicator of wear. The DT 414 started using the pressure balanced pistons and larger breather at engine sn 118713. A lot of engines overhauled over the years have that piston and ring installed, not every one installed the breather kit however. If they didn't there was a lot of oil carry over out of side mounted breather. Food for thought.
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Today's Featured Article - Gettin My Old Tractor Home - by Clayton Sweeney. My name is Clayton Sweeney. I am from Southern Maryland in a small town called Lothian. I am 20 and my father and I are the proud owner of a 1954 Allis Chalmers WD-45. When I was 18, I dated a girl in the next county over. Her family are tobacco farmers. It was a cold Thanksgiving evening, and we were going up to her Grandparents house. As we passed one of their barns, I noticed something orange in the corner of my eye in this old shed. It was pretty dark and I asked what it was
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