For three-way dump trucks (with a feature of dumping in three directions), on some of them, the wrong type of stopper is fitted for preventing the bracket (body cross hinge) connecting the bed and the cylinder unit from coming out. If left unfixed, the hinge may come out the bed, causing the rear of the cylinder unit to fall on the rear axle housing. At worst, the brake pipe is damaged causing brake fluid leakage, and brake efficiency is reduced. Also, if this problem happens when the bed is raised, the bed may fall.