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The Cleveland Motor Plow Company was incorporated in 1916. Founded by Rollin H. White, manufacturer of the White steam car, the company began building a 10 drawbar horsepower crawler tractor, called the model R. This tractor used a four cylinder Buda engine. It was renamed as the Cleveland Tractor Company who built at least 58 different models, from 1916 to 1946, when it was merged with the Oliver Farm Equipment Company, to form the Oliver Corporation. Tractors were built from 9 to 100 drawbar horsepower, using both gasoline and diesel engines.
Oliver in turn ran into financial problems and sold to White Motor Company in 1961 who promptly discontinuted crawler production except for a couple small models, the OC-4 and OC-9 whose production continuted until 1967. Featured here is the Oliver OC-15, one of the larger models made (There was an OC-18). It was manufactured the best I can tell from around 1956 until the axe dropped in 1961. The Cletrac-Oliver serial number guide suggest something over 600 of these tractors were manufactured with most sold in 1958-and 1959. The blade, winch, and canopy are all aftermarket items, and were unlikely to have been installed on very many. Cletrac's primary market seems to have been agricultural use. The Nebraska test results can be found for the OC-15 as well.
This model features a Hercules DRXC 629 cu in Diesel engine (4.625x5.25) turning at 1500 RPM. It has Air assisted brakes and air assisted differential steering. The engine produces around 70 hp. The machine could be called a D-6 class machine--at least a D-6 competitor for it's time era. Although this machine was only acequired by us in 2016, personally this writer has a long history with the machine. I learned to operate a dozer by running this machine for several months on a logging show about 50 years ago.