If thats a new radiator they ordered for you, I didn't know anyone made a low pressure one anymore. Makes me wonder what you had to start with. If the radiator shop was wrong about the radiator being for a M, SM theres the possibility the 400 had a late model IH replacement radiator with a smaller cap than the standard pressure type one. If the radiator you removed had the fill cap above a non molested grill, it wasn't a SM one. If the cap was above a unmolested grill hood to start with, I would say you had a 400 one to start with. Did the radiator you removed have a bigger hole for the steering shaft to pass through than the replacement? What I'm getting at is you could have a radiator with a bigger cap now and its still not a low pressure radiator. If you have a low pressure opening on the radiator fill the gas cap is the same size. Does the gas cap look the same size as the radiator opening? Bottom line is a radiator for a M or SM is going to leave the fill cap below the grill hood level. Some aftermarket radiators put a longer neck on the top to come above the hood. Original IH 400 radiators used a taller top radiator tank with a standard length neck.
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Today's Featured Article - Tractor Generators - by Chris Pratt. As a companion to the articles on three-brush and two-brush generators, it seemed fitting that we should provide our readers with a description of how a generator works in lay terms. The difficulty with all those "theory of operation" texts is that they border on principles of electricity or physics and such. Since I know nothing of either, you will have to put up with looking at the common sense side of how generators work which means we "
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