The Samson company began producing the "Sieve Grip" tractors in Stockton, California. Available in two models, the three-wheeled tractor was very low (for orchard use), and the steel wheels were open between the treads. After Ford began making tractors, General Motors decided to get into the business. In 1919, GM purchased Samson, and moved operations to Janesville, Wisconsin (consolidating with the Janesville Machine Company operations, that GM also purchased). The factory made both Samson tractors and two sizes of Samson trucks. The Sieve Grip tractors were too expensive to compete with Ford, so the line was replaced with the Samson M. The M was very affordable, and sold well. A larger model A was planned, but the company diverted resources to Iron Horse cultivator. The cultivator was poorly designed, and the competition was fierce. Soon GM was losing money, and decided to end production of the entire Samson line. In 1922, GM converted the factory into a Chevrolet assembly line.
Model Power Years
No photo available Samson A 0hp -
No photo available Samson Iron Horse D 0hp -
Samson M tractor photo Samson M 21hp 1918 - 1922
Samson S25 Sieve-Grip tractor photo Samson S25 Sieve-Grip 31hp 1916 - 1918
No photo available Samson Sieve Grip 10-25 27hp 1914 - 1917
No photo available Samson Sieve Grip 12-25 27hp 1917 - 1918
No photo available Samson Sieve Grip 6-12 13hp 1912 - 1917