Mack Offroad Mack FC 1936 - 1947 ByTrucksplanet Published on 04.11.2026 Share Tweet One of the version of on-road F-series was heavy duty off-road FC-model (1936-1947, 273 pcs. produced). Three-axis version FCSW were producing also. Total weight up to 45 tons (produced 2 trucks for Sunlight Coal Company). Continue Reading Related Topics: