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Adams, Allis-Chalmers, Austin

6 photo(s) Updated on: 09/17/2015
  • 1937 J. D. Adams 301 grader on International Harvester I-30 wheel tractor. Has long, low moldboard for light grading.
  • 1930s Allis-Chalmers Superior-McCully 10” gyratory crusher. Rock is dumped in the top, and the pulley in back drives a shaft that gyrates the core (whose top is visible) to crush the rock.
  • In the 1920s and early 1930s, motor graders were assembled by mounting a grader onto an industrial tractor chassis. This Austin grader is powered by a McCormick-Deering 1020 tractor.
  • c. 1920 Austin Standard pull grader. The teamster sits up front, and the blademan stands in back.
  • c. 1929 Adams Leaning Wheel No. 7 pull grader. The “Leaning Wheel” name alludes to the feature developed by J. D. Adams in 1885 to force the grader’s weight onto the blade, increasing its efficiency
  • When it was introduced in 1947, the Allis-Chalmers HD19 was the world's largest and most powerful crawler tractor.

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