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Interstate Tractor
Explore 3 farm tractor models. Follow a model into its engine specifications, transmissions, dimensions, historical photographs, and available test records.
About Interstate Tractor
Interstate Tractor was organized in Waterloo, Iowa, in 1915 from the Sandy McManus Engine Company’s reorganization. Its Plow Boy and Plow Man tractors used purchased components.
- Beginning
- 1915
- Founder / origin
- Reorganization of Sandy McManus Engine Company
- Known for
- Assembled early agricultural tractors
- Sale / later history
- Rapid decline after 1919; disappeared after 1920 in the reviewed account
History and legacy
The company reported domestic and export sales by the end of World War I. The source does not establish a precise final legal-closure date or a buyer that continued the original tractor operation.
Sources & further reading
History reviewed 2026-10-20.
Showing 3 of 3 models
Plow Man 13-30
1916–1920
33 hp
Engine estimate from belt power
2WD Only
Drive
Plow Man 15-30
1918–1920
33 hp
Engine estimate from belt power
2WD Only
Drive
Plow Boy 10-20
1916–1918
22 hp
Engine estimate from belt power
2WD Only
Drive
Index power values can include estimates derived from belt or PTO power. They are identified on each model card and are not interchangeable with a measured engine rating. Model years and missing values follow the source index.