Hello, I'm new to this site. I just bought a '51 F7 Marmon Herrington 4x4 flatbed/dump. My first question is what size [tonnage] are each, F1=, F2=, etc. Most of all, what tonnage is an F7? Thanks!

 

This information is taken from the Ford sales manual:
F1 - max payload of 1480 lbs, 1850 lbs including body & equip.
F2 - max payload of 2428 lbs including body & equip.
F3 - max payload of 3340 lbs including body & equip.
F4 - max payload of almost 5000 lbs, 5980 lbs including body & equip.
F5 - max payload over 8000 lbs, 9570 lbs including body & equip.
F6 - max payload over 5 tons, 11,305 lbs including body & equip.
F7 - max payload of 12,865 lbs including body & equip.
F8 - max payload of 15,465 lbs including body & equip.

The F7 was available with Dump bodies, tank bodies, firetrucks, 5th wheels, etc.

 

Wow the standard F-1 was pretty light. My F-1 weighs about 4300pds with 2 tires off the scale.. Needless to say it has a 1973 3/4 ton 4 wheel drive chasis.. Thats interesting facts.

 

I don't know what my F7 weighs, but the Marmon-Herrington tag lists the GVW at 19000 lbs. Thanks for the info guys.

 

Sorry, I thought you were interested in payload.
Max GVW for the F7 is - 19,000 Lbs
Max GVW for the F1 is - 4,700 Lbs