EID style retainer was first used on automotive applications, # 27984 with rounded heel weights in 1985 before they were ever released for ag or construction use. Olds 5.7, 4.3, GM 6.2 and 6.5 and Ford/IH 6.9/7.3. Some ag pumps that have the rounded heel weights use the same retainer. New style # 29111 is for pumps with square heel weights used in most ag and construction pumps. Actually the latest Stanadyne pellethane flex ring holds up much better than the previous ring did, have seen them still last over 25 years. I think of the flex ring as a safety fuse as high hour pumps should have the pilot tube and DV spring replaced at least. Have seen heads lock up when the spring breaks and locks up through the rotor ports. Always enjoy your posts, keep it up!
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Today's Featured Article - Gatherin of the Orange - by Rick Nikolich. In July of 1998 I was talking to fellow Allis Chalmers collector Mike Schilling about the annual "Gathering of The Orange" AC show coming up in August of 1999. He got this wild idea that we should get a convoy of AC tractors and drive them from Charlotte, Michigan 105 miles to LaGrange, Indiana.
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