Allis-Chalmers bought Ryan Manufacturing Co., a producer of road graders, and proceeded to offer a two-model grader line of “Speed Controls” in the hp (kW) No. 42 and the larger No. 54. Both models had a forward mounted gasoline engine. In 1952 Allis-Chalmers took over the LaPlant-Choate Manufacturing Co. in order to enter the scraper business. LaPlant's existing scrapers were reintroduced as Allis-Chalmers TS-200 and TS-300.