In business since 1962, Polk Diesel & Machine has been repairing and maintaining diesel engines. Located in De Forest, Wis., the company offers an array of services, such as Allison transmission program, street sweeper repair/reconditioning, performance automotive engine building, component rebuilding, cylinder head and more. Additionally, it provides Crankshaft, connecting rods and general machine services, to name a few. Polk Diesel & Machine repairs/maintains and services medium/heavy duty trucks, including snow plows, buses, fire trucks, garbage packers, gravel trucks and more. The company serves Wisconsin, Illinois, Minnesota and Michigan.