1) Appearance of the overhead crane from China manufacturer: clean the appearance comprehensively, so that there is no dust accumulation and no yellow robes. Check for cracks and open welding.
2) Check the overhead crane from China manufacturer to see if it leaks oil. If there is abnormal noise in the box during operation, it is necessary to open the box cover to check. Generally, it is caused by bearing damage, excessive gear meshing backlash, and serious tooth surface wear.
3) Lifting winch: ① Check whether the wire rope, hook and pulley are safe and reliable, and should be replaced if the wear exceeds the specified value. ②Check and adjust the brake to make it safe, sensitive and reliable.

4) Inspection of wire ropes of overhead crane from China manufacturer. Commonly used varieties are phosphating coated steel wire rope, galvanized steel wire rope and smooth steel wire rope. When inspecting the steel wire rope, focus on observing broken wires, wear, kinks, rust, etc. For some positions with serious wear and broken wires but not exceeding the standard, do Mark for focus on follow-up re-inspection. Pay attention to check whether the safety limiter of the wire rope in the drum is effective, whether the wire rope pressure plate on the drum is pressed tightly and whether the number of pressure plates is appropriate.
5) Lubrication: Check the oil quality and quantity of all parts of overhead crane from China manufacturer, and add or replace the lubricating oil as required.
6) Electrical: 1. Check whether the limit switches are sensitive and reliable; 3. Check whether the electrical movements in the overhead crane from China manufacturer are sensitive and reliable; 3. Check whether the motor, electric bell and wire are safe and reliable; 4. Check whether the signal lights are in good condition.