The Oliver Chilled Plow Tractor: the plow works builds twenty tractors

c. 1926 – 1929

Why a plow works built a tractor: Oliver's tractor-age business before it built any tractor was making the implements tractors pulled. On the company-history account, Oliver was the sole producer of tractor plows for Ford's Fordson, and during the World War I years it built its Plant No. 2, a little south and west of the great Plant No. 1 on Chapin Street, for the purpose of building tractor plows. When Ford moved Fordson production to Ireland and the plow contract ended, the works that had tooled up for the tractor age was left holding the tooling and the knowledge. In the 1920s, on Oliver Heritage's published company history, "Oliver began experimenting with a tractor of its own. The result was the 'Oliver Chilled Plow Tractor.'" The experiments are dated from about 1926 in the company-history tradition; the machines themselves are dated 1927 to 1929 in the model record.

The machine and its run: About twenty Chilled Plow Tractors were manufactured and distributed throughout the United States, where they were well received — that is the company-history account, and the model table carried by Old Iron Garage gives the run in one line: "Chilled Plow Tractor — Row Crop — 1927–1929 — 20 produced." It was a row-crop machine on tip-toe steel wheels, designed around the works' own patented pipe-mount implement system, so that the plow maker's implements mounted to the tractor maker's frame as one system. Collector discussion credits the design to the Altgelt brothers, longtime Oliver employees; that attribution rests on the collector forums and is printed at that strength. The standard production references do not carry the machine as a production model — TractorData's Oliver roster begins with the 18-28 of 1930 — and this record prints it for what the sources support: a works-built pre-production run at the end of the independent company's life, built by the Oliver Chilled Plow Works, whose works stood in South Bend. No carrier reached places the building of these machines anywhere else, and no other Oliver plant of the 1920s made plows.

What became of the design: The merger of 1 April 1929 (its corporate course is the Businesses record's, at pointer size here) ended the experiment as an independent product and continued it as a design: Farm Progress, in its Oliver history of 10 January 2022, records that after the merger "the Oliver Chilled Plow Tractor became known as the Hart-Parr Oliver Row Crop, later renamed the 18-27" — the row-crop line of the merged company, its engineering drawn jointly from the South Bend machine and Hart-Parr's, its manufacture at Charles City, Iowa. The South Bend tractor's descendants were Iowa tractors.

The survivors, in conflict: Oliver Heritage's company history states that "only one example of this tractor is known to exist today." A collector writing in the Yesterday's Tractors forum knows of two surviving examples. Both counts are printed as their carriers give them; the record reached does not settle whether one machine or two remain.

Sources:

1. Oliver Heritage (oliverheritage.com), the published Oliver company history — the experimenting sentence and the "only one example" survivor count, quoted; the merger and plant geography in the boundary entry below.
2. The Oliver company-history account credited to Jeff McVey, "Oliver Machinery Co." history (updated 19 February 2025) — the Fordson sole-producer plow contract, Plant No. 2 built for tractor plows, and the c. 1926 start of the experiments after the Fordson contract ended.
3. Old Iron Garage's Oliver model table — "Chilled Plow Tractor — Row Crop — 1927–1929 — 20 produced."
4. Farm Progress, 10 January 2022 — the Chilled Plow Tractor's continuation as the Hart-Parr Oliver Row Crop, later the 18-27, after the 1929 merger.
5. Yesterday's Tractors forum, collector discussion of the Chilled Plow Tractor — the Altgelt brothers design credit, the pipe-mount system and tip-toe wheels, and the two-survivor count; printed as collector discussion, the weakest carrier in this entry.
6. TractorData's Oliver roster — no pre-1930 Oliver production model listed; the 18-28 of 1930 leads the production line.