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In 1937, the 18-27 Row Crop and 18-28 Standard were replaced by the 80. The 80 was built as a standard or row crop variation. This 3-plow model continued to use the Waukesha/Oliver engine. Oliver experimented with putting a Buda diesel in the engine, but a very limited amount of these were built, and out of 136 tractors, only a few of them are known to exist today.
The model 28-44 was upgraded to the model 90 in 1937, and the high compression model became the 99. The 90 and 99 were only built in a standard version. The 90 could burn gas, kerosene, or distillate.
The Oliver 60 was introduced in 1940 and had the same styling as the streamlined 70. It used the Waukesha/Oliver gasoline engine and was sold as a standard, row crop, or industrial model. It was Oliver’s biggest little tractor and developed 17.85 drawbar horsepower.
EARLY OLIVER TRACTORS