There were 3 IH pumps used on the gas start tractors (There is also the Bosch pump). This is the way that my pump rebuilder (now deceased) explained it to me and his informatin does match what I have in my W-series collection. The earlier tractors had the "pre-A" pumps which had no marking. The later tractors had the "A" pumps which are identified by the large "A" on the pump. Finally, the "B" pumps which were identified by a large IH symbol on the upper part of the pump and yes, the "B's" had the drain tube at the bottom. IH started installing the "B" pumps part way through the production of the Supers, the regular tractors never came from the factory with "B" pumps.
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Today's Featured Article - Women and Tractors - Tractor Engine Repair - by Teri Burkholder. One of the great things about working on a tractor engine with your other half is that you know what he is thinking of at all times and can anticipate his every move and his next thought of what he will do. With Ben, anyway, I can tell! He'll be busy working and I’m handing him tools and he says, "give me that..." and I’ve already got it in his hand or "hand me that....."and I’ve got the portable light right where he needed it placed to see. "Run in the house and get me a...."as I open th
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