IH used to sell the change over package with instructions. They said to dull the sharp edges of the oil grove. Ones with the change that I notice just have the upper edge of the grove rounded off a little. If you can find the seal (around a hundred bucks sometime ago) you need the cast or steel retainers and the different length bolts used to mount them. Also they used a different gasket between the retainers, the two small ones. Retainers will have a 271xxxr1 number on them, don't remember the whole number. May have one if you need, would need to look. At one time IH started only furnishing replacement crankshafts like used in the later 400 and 450 engines without the oil return grove. They wanted most engines switched over to the new seal. But now its easier to get parts for the old type.
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Today's Featured Article - The Rescue of a Fordson F - by Anthony West. Introduction I live in the UK and have for many years restored Fordson tractors (in the main model N's). I have also restored and shown model F's, E 27N's, Field Marshall Series 2, David Brown Cropmasters and the old rey Fergeson T 20. At one time I had seven restored examples which were shown and used in ploughing matches. As most restorers, I have a number of war stories I can relate on a range of topics that may help other like minded and interested people. Perhaps my first p
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