It is a pipe plug, used to lock pump from turning when serviceing pump. They went to a hex plug with a hole in the end for a locking pin. Don't ask me why as I never locked that model pump when working on them. I doesn't lead to a pressurized galley but it goes right into the sump that is running in oil from your engine. Just plug it up, and of course, see how much oil you lost. I have seen the idle adjustment plunger fall out and lose the engine oil but not that plug.
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Today's Featured Article - Tractor Profile: Allis-Chalmers Model G - by Staff. The first Allis-Chalmers Model G was produced in 1948 in Gasden, Alabama, and was designed for vegetable gardeners, small farms and landscape businesses. It is a small compact tractor that came with a complete line of implements especially tailored for its unique design. It featured a rear-mounted Continental N62 four-cylinder engine with a 2-3/8 x 3-1/2 inch bore and stroke. The rear-mounted engine provided traction for the rear wheels while at the same time gave the tractor operator a gre
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