Very common for all the Stanadyne Roosamaster D series until 1985. After that, a different updated dampener is used.
Complete seal kit with new pellathane dampener is $15. It takes an hour, start to finish, to take the pump all apart, fix, and put back together.
Most pumps, by the time that ring falls apart, need a few other hard parts. Total cost is usually less then $50.
Sending to a shop, in my opinion, has always been way overpriced. These pumps never get truly rebuilt, just patched up and often a $500 - $600 repair bill gets you $30 in new parts and an hour or two in actual labor.
Replacement parts are available for sale to anyone and shipping is fast when ordered from the right place.
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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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