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 - Trenching With a Plow - by Staff. Introduction: This interesting information came from one of the discussion forums here at YT. We thought we should place it up front so it could be read by anyone interested in putting old iron to work. [Editor] I tried something new today, and it worked so well I thought I should post it - in case it might help someone else. I'm running 100 yards of 4" drain pipe from the gutter downspouts of our house to a pond down the hill. This should hel
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