Each contactor and the main and auxiliary contacts of the relay should be checked regularly. If any singeing occurs, they should be smoothed with fine sandpaper. If severe, they should be replaced.

Gantry cranes are known for their versatility and strength. They are capable of lifting and transporting a wide range of loads from small to extremely heavy objects.

When the gantry crane is in use, it is a safety protection device that can effectively prevent overloading. It is also called a lifting capacity limiter. Its safety function is to stop the lifting action when the crane's lifting load exceeds the rated value, thereby avoiding overloading accidents.

Operators should carry out inspections and maintenance work for each shift according to daily maintenance requirements, fill in operation records, shift handover records, and do a good job in shift handover work.

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Gantry crane is a bridge-type crane whose bridge is supported on the ground track through outriggers on both sides.