Garbage Grab Cranes are an important auxiliary equipment. Its role is to grab garbage pit into trash receptacles, stirring, partitioned heap fermentation and dumping into waste incineration boliers for burning. Garbage grab cranes are in a special designed bridge crane, its main components are the grab, hoisting equipment, travel equipment, cable suspension device, the operation control device, weighing devices and safety protection device structure, all agencies operating in the fixed room, commonly referred to as junk crane. garbage grab crane operationg environment is very poor and harsh.