Starting in 1949 Sheppard built a 1,2,and 3 cylinder tractor. Not many 1 cyls. built,the SD-2,and SD-3 had Sheppard Engines with Detroit Timken drives. They also,built the 6M conversion,a 3 cylinder engine for Farmall M's. In the mid 50's,they built the SD-4,their own engine and drives. Sheppards weren't big sellers for several reasons. They weren't cheap,and no dealer floor plan.All tractors had to be paid before they left Hanover.Also,they just weren't powerful.None ever Nebraska tested. They supposedly sent a SD-4 to Nebraske,but withdrew it from the testing because it wouldn't make the hp,they wanted to advertise. Sheppards had 22.to 1 compression ratio with squirt gun injection pressures,we now know that's not how to make hp in diesels. Their main claim was they were the first direct start diesel tractor.
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Today's Featured Article - Fasteners: The Nuts and Bolts of Nuts and Bolts - by Curtis Von Fange. The nuts and bolts of nuts and bolts is an interesting and essential piece of knowledge that applies to our older tractors. An improperly torqued capscrew on an engine head or a shear bolt that is too hard on the driving shaft of a bushog can create havoc and make an expensive and uncalled for repair. Let�s examine the purpose and design of these fasteners in order to ensure their proper use. Fasteners are probably one of the aspects of mechanics that is given the least amount of thought.
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