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The factory piping, from what I've seen in pictures online, is usually threaded black iron pipe. This machine
came with a replacement oil pump, and flared soft-copper tubing, so I suspect this is not an original fitting.
It appears somebody turned down a flare fitting and soldered it into the pipe-thread end of a brass elbow-
It's a bit odd, but it works, and I see no reason at the moment to change it.





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