Coleman built extremely heavy duty rigs for government agencies like the forest service and the US military, including huge aircraft moving tugs for the Air Force, as well as a limited number of civilian vehicles. They sort of catered to the "I don't care what it costs- - - -make it rugged" customer base.
Jerry
I can tell haha. The truck has front & rear 15x4 brakes, double frame. Gvwr 19,500
Gvcwr is 38k
If you have any coleman info that would be much appreciated, thanks jerry!