Hi Brand. Thank you for your question!

　　Reasons:

　　1. The elbow plate and elbow pad are purchased or reformed by themselves, which does not meet the design requirements of the main engine factory;

　　2. The fixing bolt of the adjusting seat is loose;

　　3. The adjustment seat has serious casting defects or welding defects.

　　Exclusion methods:

　　1. Replace the jaw crusher adjustment seat and replace the original elbow plate and elbow plate pad of the assembly host factory;

　　2. Replace the adjusting seat and tighten the adjusting seat bolts;

　　3. Replace the adjusting seat.