The first and most significant difference put into these tractors was the gasoline engine. Six experimental tractors were pulled from the “A” production line and reworked by the engineering personnel to include many of their wartime improvements. Even if they could have released these ideas as they came up with them, it wouldn’t have made much sense for Deere to do that when many of its customers were rather busy overseas.ĭirect development of the newest rendering of the model “A” began in 1945. While these upgrades were not allowed to be added to their tractors due to a War Production Board edict in 1942, Deere, and Wiman especially, knew that research needed to continue so that the company could come out strong when the war ended. As the war wore on, Deere continued to do research and engineer more upgrades for its tractor line under the directive of the president of Deere and Company, C.D. Just before the United States entered World War II, John Deere updated its model “A” with a more powerful engine, six-speed transmission and a number of other improvements.
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