It should be noted that the gourds of the oil tank are generally dual chains or four chains. The chain cannot be twisted when installing the gourd, and some workers do not confirm this problem carefully during installation. When the chain is twisted, the sprocket can not be correctly passed through the sprocket. In this case, it is necessary to solve it in time, because the more you raise the twist, the more powerful, the chain is twisted upward, the gear deviates from the center, and the motor reducer will have a connection. The teeth and five -toothed long shafts will be stuck, and the motor will be damaged by overloaded. This kind of abnormal noise is that the chain is twisted, not straight, the chain length cannot be seen, the more twisted upward, the more powerful the chain can be increased to the top to facilitate confirmation.