Dryer internal structure is very simple, consisting of a plurality of mechanical parts, the more simple structure, the more we should carefully assembled production, such as the dryer bearings, tugs, belt allowed to trace errors occur, otherwise, ranging from the impact production, heavy equipment paralysis. Tug worn reasons the following points: First, the dryer design unreasonable: Dryer tugboat carrying the whole weight of the sand dryer, after a period of use, after a tug appear more serious wear and tear, caused by wear and tear tugboat or there is an error in the production process, the solution is only improving equipment. Second, dryer equipment operator caused by improper operation, such as equipment cylinder occurs case teetered back and forth tug should adjust. Third, due to equipment maintenance is not serious, the equipment to regular maintenance, overhaul, found a small problem should be solved in time to avoid serious damage to the device.