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Historical Construction Equipment Association
Home of the National Construction Equipment Museum

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Federal, Ferguson, flaherty, fordson, fruehauf

<< All album photos 2/7 photos
A proofroller, like this 1954 Ferguson RT100S, is simply a steel box on a four-tired axle. Filled with ballast to 50 tons, it tests earthfill to ensure that it is compacted to specifications.
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