I have a’51 GMC that had a flat, dump bed originally and when I got it. I got a nice 9’ box and would like to mount it and still utilize the pto driven dump apparatus. Did the factory offer that setup or only for flatbeds? My guess is they didn’t just because I’m not sure how the joint at the fender to running board would’ve been handled. Any thoughts on how to pull this off? Thanks for any ideas, suggestions or thoughts.
As for factory, that I don’t know. Perhaps it was a dealer installed thing. But, I do know a fellow that has his pickup box mounted on a dump system like yours. The box is mounted to the lift frame. The rear of the truck frame is shortened to accommodate the box when it pivots. The frame is shortened to the first crossmember from the back. The rear fenders are not bolted to the running boards either.it is pretty slick. The box does ride a tiny bit higher than normal and it is discernible.
Last edited by Fox; 10/31/20203:51 AM.
1970 Chevrolet C10 Grandpa's -- My first truck -- In progress to shiny Follow the build in the Project Journal 1950 Chevrolet 1-Ton Dually "Ole Red Girl" In the Stovebolt Gallery More pictures here 1951 GMC 9430 1 ton dually--Shiny! | 1972 Chevrolet C20- Rusty- the puzzle box lid for the C10 | 1962 AMC Rambler American- my wife's Parts trucks- 1951 GMC 9300 | 1951-GMC 9430 | 1951- Chevrolet 1300
You might pick up some tips from a low rider forum. They have rides that the bed raises to above the cab and then turns 90*. Not my cup of tea but ideas know no bounds.
I had a dump bed on my 52 which I have removed. I didn’t take to many pictures of it but here are a couple which may help. Basically the sub frame of the lift acts as support to the cross rails that the box sides and bed mount to. I still have the old dump frame behind my shop. I may have better pictures if you need more. As mentioned above, the frame tails do get cut off to allow for the bed to tip.
Still not certain what the best route will be, but I’m considering just raising the floor a bit so it can still sit at the right height. It likely won’t be used at full capacity anymore anyway. But I think losing a little depth inside the bed would be preferable to having the box sitting way above where it should.
I have a 51 GMC one ton long bed stepside with a dump. The bed sits on white oak rails. I am including some pics that I hope will assist. The dual ram lift has a framework that the bed bolts to along with thru bolts with the excentric washers that extend through the oak with counter bored holes on the underside of the oak to accommodate the nut, lock washer and flat washer. The bolts are cut just shy of the bottom of the oak rail so they don't hit the metal truck frame. The oak rails are relieved for any bolts or rivet heads in the frame so the oak can sit flat on the frame. The oak rail is 2" high and 4"wide.The rear of the frame was clipped on an angle and the box pivots on a pipe. If you desire I can get a few more pictures and dimensions. Because of the dump there is no rear bumper and the running boards, usually bolted to the fenders, have been unbolted and slightly hammered for clearance.Hope this helps some Ricster
Photos of my favorite 1 ton in Saskatchewan, you can see the hoist is not too noticeable when the box is down. This hoist kit raised the box about 1.5 inches from it's stock height, but also moved the box back about 3/4 inch to allow fender clearance
These are not home made hoists, the kits were made specifically for the model of trucks they went on. The one shown here was made by a company in Winnipeg Manitoba, there is an aluminum manufacture tag riveted on.
All my 1 tons have a dump hoist, but from several different manufactures. All are similar in design, top and bottom rails, all steel, the PTO operates the pump. The better ones use one large cylinder with a compound hinge, two cylinders is actually less stable because the two are open center so nothing forces them to be extended uniformly.
I haven't see the hoist on smaller than 1 tons, but there isn't any reason you couldn't fit it to a 3/4 ton the exact same way. The 1/2 ton would need a different design and I've never seen one on the 1/2 ton
added a photo of the better compound hinge with 1 cylinder design, that one will lift 8000lb of gravel like there's nothing in the box, engine just at idle is all it takes -s
