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TheEMD DH1 was a class of experimentaldiesel-hydraulicswitcher locomotives built byGeneral Motors Electro-Motive Division in May 1951.[1] It was powered by a pair of small diesel engines suspended under the frame, driving through a pair ofAllisontorque converter transmissions to the inside wheels on eachtruck. These inside wheels were substantially smaller than the outside wheels on each truck.
Over 60 examples of a three axle DHI and its derivatives were built byClyde Engineering in Australia and used on private railways, in particular in thesugar industry inQueensland. The Clyde Engineering model was the DHI-71 and the two DHI-110s on Lakewood Firewood Company. These DHI models were built between 6/54 and 6/71.
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