The GMC CCKW

Again more questions than answers, but this site has all of the CCKW knowledge on it, so belly up to the bar guys and help me out. Question: Why is there a door in the front of the bed of the tipper that opens from gravity when the truck is dumped. Underneat the bed is a plywood, metal frame box that catches what goes through the open door. Thanks for all the information I know I am going to get.

Not sure if this is the reason but if the truck was carrying a sheeted load and the body was tipped with the sheet still in place the suction caused by the load leaving the body can cause the sheet to tear. This is something that commonly happens on current tippers fitted with the modern type of roll sheets as they are a fairly air tight fit. As the CCKW has a small tailgate the load could easily block the tailgate and with a close fitting sheet suction could occur but this is only a guess.

It is a great answer and the best one I have yet heard. I have never hauled loads of dirt, gravel or other materials, so never thought of the sheeting. Thanks.

The door you speak of was the the way they limited the volume carried in the trucks bed when the truck was being used as a dump ,as the structure of the hoist would not support the weight of a load and bed that far forward . The door in fact has two latches that will support the door in its upright position they are on the cab side of the raised divider panel if the racks/ troop seats are on the truck you need to lift the second seat leg from the front and underneath you will find the hole the latchs go into. See the latest Military Vehicles Magazine issue # 121 "tippers! troop trucks that dump"

I found the latches. If I understand you, abn duce, the door was put in an upright position before the truck was loaded so that the materials carried in the dump truck would not be put any farther than the door. Thanks for that information.

Your quite welcome We tipper /dump people have to stick together LOL .
in issue 121 june 2007 of Military Vehicles are some great photo's of the divider and its use.