1. Check overhead crane if there is oil leak on reducer. If abnormal sound during running time, generally due to bearing damage or gear meshing backlash is too large, serious tooth wear and other reasons.
2. Check the overhead crane lifting and traveling brake performance. Brake is an important part of the overhead crane, must carefully check the lifting and traveling brake situation, observe the brake opening and friction components wear pattern. Belt brake should pay attention to check the steel backing has crack or not, the transmission is flexible or not, the brake frame is intact or not, the main spring and auxiliary spring elasticity meets the requirements or not.
3. Overhead crane Wire rope inspection. Check the wire rope should focus on its broken wire, wear, kink, corrosion, etc, should mark the parts which was worn seriously but not yet need be replaced, in order to focus on tracking retest. Pay attention to check the wire rope safety limiter is effective or not, the rope plate on drum is impacted or not and the pressure plate quantity is appropriate or not.
4. Check the overhead crane hoist pulleys. The most important is checking whether the cell bottom was worn excessive and the pulley has cracks or not. and must check the pulleys rotation flexibility before installation.
5. Check the coupling is loose or even rolling key or not. Pay attention to check whether the elastic rubber ring of the elastic pin joint has abnormal wear or not, and check the gear ring wear condition. Due to poor installation accuracy, there may be larger offset between the two axes, the whole ring will soon be damaged. In this situation, the lifting mechanism will occur serious accident.
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