Bob: The Super A is the same, and there is close to 3/4" of surface. The surface is unform size except for this 3/16" wide x 1/16" high rise on the inner end of pulley hub, that will be just behind the seal when installed. I did slide the seal on over that and it does fit snug to the surface, all positions. I can feel a bit of roughness on that surface though, thus I'm thinking the sleeve may be the best approach. That said, probably Don's suggested seal part number is the way to go. I see the part listing on CaseIH parts on line. I was also quite surprised to see the pulley still available new from CaseIH.
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Today's Featured Article - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
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