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Caterpillar tractors by factory

Also see Challenger.



Caterpillar Tractor History

Caterpillar Twenty-Two tractorThe Caterpillar Tractor Company was formed in 1925 with the merger of the Holt and Best companies. Both had been independently 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 rentered 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


San Leandro, CA
Diesel Sixty85 hp1931 - 1932

Stockton, CA
2-Ton27 hp1925 - 1928

Peoria, IL
Diesel Sixty-Fiveunknown1932 - 1933
Diesel Thirty-Five50 hp1933 - 1934
Diesel Fifty73 hp1933 - 1936
D8122 hp1941 - 1974
D9286 hp1955 - 1961
RD444 hp1935 - 1940
Diesel Forty62 hp1934 - 1936
Diesel Seventy-Five103 hp1933 - 1935
2-Ton27 hp1925 - 1928
10-Ton61 hp1925
5-Ton44 hp1925 - 1926
R235 hp1934 - 1942
Sixty-Five72 hp1932 - 1933
Fifty67 hp1931 - 1937
Forty62 hp1934 - 1936
Thirty-Five48 hp1932 - 1934
Twenty-Eightunknown1933 - 1935
Twenty-Five27 hp1931 - 1933
R565 hp1934 - 1940

Peoria, Illinois, USA
Seventy-Five103 hp1933 - 1935
R4unknown1938 - 1944
Thirty40 hp1925 - 1938
Twenty-Two32 hp1934 - 1939
Twenty32 hp1927 - 1931
Sixty81 hp1925 - 1931
R346 hp1934 - 1935
Seventy77 hp1933 - 1937
Ten16 hp1928 - 1932
D457 hp1938 - 1957
D686 hp1941 - 1947
D799 hp1940 - 1961
RD8114 hp1935 - 1941
RD775 hp1935 - 1940
D230 hp1938 - 1957

San Leandro, California, USA
Sixty81 hp1925 - 1931
Twenty32 hp1927 - 1931
Thirty40 hp1925 - 1938

Unknown
Fifteen27 hp1928 - 1933
AG6240 hp1986 - 1993
AG4unknown1986
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