I have another question. This time about my 7256. In the pic below, what is that part that I circled and pointed an arrow at? It looks to be sticking out further than the one on my 6255. Lower oil seal? I thought that it would be up further. I am new to these older pre-1976 D engines (D400 series engines). I have much interest in them. They seem to be some of the best and most reliable engines built IMHO. TIA!
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