The bed on my 5 yard dump truck is probably as old as the truck, which is a 1983 model. It's rusted and ribbed on the bottom from years and years of use. With dry material, it slides out fine, but if the clay has any moisture at all, it sticks real bad. Each load gets worse, and if I keep at it, I can go from dumping 5 yards, to less then one yard with over 4 yards sticking to the bed.
Some days, I've had to shovel out the corners every four to five loads. It was really frustrating.
I did a search and read an article on
HeavyEquiptmentForums.Com in the trucks section.
dirt sticks in the dump box - Heavy Equipment Forums
The cheapest fix without welding or replacing the bed is a paint type product called Hammerite Rust Cap, smooth finish. I bought one gallon of it for $74 plus shipping.
Search: hammerite
I used over half the gallon, but I also put it on really thick with a small roller. It's miserably sticky and aweful stuff to work with. It gets on everything and doesn't wash off. Thinner didn't help either. The next day, it dried to a glossy, smooth finish. I've hauled about 400 yards with it since putting it on and there is no sign of wear, and I no longer have any sticking issues. It's truly an amazing product!!!!
From what the guy at Heavy Equipment Forums said, he puts on a fresh coat every year. He's a pro and hauls every day. I move dirt off and on, but never every day. My bed is in really bad shape, so that might affect how long it lasts too. Right now, I just don't know, but if I had to do it once a month, it would be worth it to me.
Good luck,
Eddie
