Mack » FG / FH / FJ / FK / FN
Heavy duty F-series was introduced in 1937. These trucks were produced during the War up to 1947. Vehicles of this series replaced the old AC and AP models. The main technical feature was a chain drive. FG (1938-1942, 162 pcs. made) -GVW of 16 tons, FH (1937-1941, 265 pcs. made) - tGVW of 19 tons, FJ (1938-1943, 322 pcs. made ) - GVW of 21 tons, FK (1938-1941, 123 pcs. made) - GVW of 23 tons, FC (1937-1947, 273 pcs. made), 3-axle version FCSW - GVW of 45 tons, FN (1940-1941, 150 pcs. made) - was used for the long haul. One major difference between these models was the size of the wheels. Trucks were equipped with a new 5-liter diesel engine rated at 131 hp and 5 speed manual gearbox, some of them with chain drive. They were available with 2- and 3-axle version SW, as well as tractors.