Abstract: There was larger impulsive force in leaning and returning of dumper body in China Huadian Fularji General Power Plant, which can damage the vehicles and the equipment. A reformation scheme was proposed, in which the original fixed dumper backup plate was replaced by removable backup plate, and the plate was driven by hydraulic pressure cylinder. After the reformation, the impulsive force in dumper and returning were eliminated completely, and the equipment operation became more stable.

Key words: dumper, hydraulic pressure backup plate, reformation