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    Caterpillar tractors by model

    Also see Challenger.



    Caterpillar Tractor History

    caterpillar/22-01.jpgThe Caterpillar Tractor Company was formed in 1925 with the merger of the Holt and Best companies. Both had been independantly developing and manufacturing tracked machinery, Holt having acquired the patents of the Hornsby company of England, which had also developed early tracked steam engines. Although heavily involved in the farming market during the early and mid 20th century, Caterpillar began to focus on construction equipment as tractors with rubber tires came to dominate the farming market. In 1987, Caterpillar reentered the agricultural market with the Challenger line of rubber-tracked tractors. In 2002, Caterpillar sold the line to AGCO who manufacture the tractors under the AGCO Challenger brand and sell through Caterpillar dealers.

    Caterpillar Inc. - offical site
    AGCO Challenger - official site
    AMCOC - Antique Caterpillar Machinery Owners Club
    Antique Caterpillar Machinery Enthusiasts - antique Cat forums
    Caterpillar Skid-steer loaders - information on Caterpillar skid-steer loaders at DiggerData.com

    ModelPowerYears
    2-Ton27 hp1925 - 1928
    5-Ton44 hp1925 - 1926
    10-Ton61 hp1925
    AG4unknown1986
    AG6unknown1986 - 1993
    D230 hp1938 - 1957
    D457 hp1938 - 1957
    D686 hp1941 - 1947
    D799 hp1940 - 1961
    D8122 hp1941 - 1974
    D9unknown1955 - 1961
    Diesel Fifty73 hp1933 - 1936
    Diesel Forty62 hp1934 - 1936
    Diesel Seventy-Five103 hp1933 - 1935
    Diesel Sixty85 hp1931 - 1932
    Diesel Sixty-Fiveunknown1932 - 1933
    Diesel Thirty-Five50 hp1933 - 1934
    Fifteen27 hp1928 - 1933
    Fifty67 hp1931 - 1937
    Forty62 hp1934 - 1936
    R235 hp1934 - 1942
    R346 hp1934 - 1935
    R4unknown1938 - 1944
    R565 hp1934 - 1940
    RD444 hpunknown
    RD7106 hp1935 - 1940
    RD8131 hp1935 - 1941
    Seventy77 hp1933 - 1937
    Seventy-Five103 hp1933 - 1935
    Sixty81 hp1925 - 1931
    Sixty-Five72 hp1932 - 1933
    Ten16 hp1928 - 1932
    Thirty40 hp1925 - 1938
    Thirty-Five48 hp1932 - 1934
    Twenty32 hp1927 - 1931
    Twenty-Eightunknown1933 - 1935
    Twenty-Five27 hp1931 - 1933
    Twenty-Two32 hp1934 - 1939
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