Here's a dump trailer without any hydraulic cylinders, hoses or valves. It's attached to the tractor with a unique 3-pt. hitch that allows it to dump at a 4 degree angle, just by backing up.

The flatbed trailer comes in three sizes -- 38  by 60 ., 50 by 78, and 60 by 96 in., with 1,200, 1,500 and 2,000 lbs. capacity, respectively. Accessories available include side boards, end boards, swinging tailgate and drawbar coupler. The larger models also have two positions for mounting the wheel for better weight distribution when towing with a solid drawbar.