What is the reason why the chain of chain block can not be pulled? According to the analysis, there may be the following points:

Reason 1: overload occurs. If the weight of the lifting object is too large, it cannot be pulled by the chain. Then, the chain can not be pulled due to inclined pulling or inclined lifting during the pulling process.

Reason 2: the chain of the chain block is jammed. If the chain of the chain block is damaged or deformed, the chain block can be hung vertically, and the chain can be hoisted after straightening out.

Reason 3: the problem of the hand zipper wheel of the chain block leads to the problem of the chain and sprocket in the engagement and the normal transmission cannot be carried out. Naturally, the chain cannot be pulled.