Dumping vehicle stabilizer system

A stabilizer system for a rear dumping vehicle of the type including a trailer supported by at least one wheeled rear axle and a tractor unit for towing the trailer, the trailer including a dump body pivotally mounted about an axis parallel with one of its wheeled rear axle(s), the tractor unit including at least one driven wheeled rear axle assembly and a fifth wheel towing assembly associated with a rigid chassis, the system comprising:

• linkage means coupling said trailer to said fifth wheel assembly;
• first and second spaced-apart ram means for tilting said dump body, each of said ram means comprising telescoping, hydraulic cylinders attached at one end to the front of said dump body, and pivotally terminating at opposite ends in pressure plate means adapted to contact at least one of said driven, wheeled rear axle assemblies of said tractor during tilting of said dump body;
• first hydraulic sub-circuit means for selectively actuating said first ram means;
• second hydraulic sub-circuit means for selectively actuating said second ram means;
• primary hydraulic circuit means for supplying hydraulic pressure to said first and second hydraulic sub-circuit means;
• first solenoid valve means communicating with said primary hydraulic circuit means for actuating said first hydraulic sub-circuit means;
• second solenoid valve means communicating with said primary hydraulic circuit means for actuating said second hydraulic sub-circuit means;
• pendulum control means for leveling said dump body during tilting of said dump body by actuating that solenoid valve means activating the ram means on the lowest side of said chassis whereby to level the dump body as it is tilted;
• and,
• said pressure plate means comprising a plurality of spaced-apart, tire contacting rollers for permitting maneuvering of said tractor and thus said trailer when said dump body is being tilted.