1. Bridge Crane Exterior: Thoroughly clean the exterior, ensuring it is free of dust and yellowing. Check for cracks and weld defects.

2. Trolley and Auxiliary Trolley:

① Check and tighten the drive shaft seats, gearbox, couplings, and shafts/keys for looseness.

② Check and adjust the brake wheel clearance to ensure it is even, sensitive, and reliable.

3. Check the bridge crane reducer, primarily for oil leaks. If abnormal noises are heard from the gearbox during operation, open the cover for inspection. This is generally caused by damaged bearings, excessive gear meshing backlash, or severe tooth wear.

4. Lifting Winch:

① Check the wire rope, hook, and pulleys for safety and reliability. Replace any components with wear exceeding specified values.

② Check and adjust the brake to ensure it is safe, sensitive, and reliable.

5. Inspection of the Bridge Crane Wire Rope. Commonly used wire ropes include phosphated coated wire ropes, galvanized wire ropes, and bright wire ropes. When inspecting wire ropes, focus on broken wires, wear, kinks, and corrosion. Mark areas with significant wear or broken wires that are still within acceptable limits for focused follow-up inspections. Pay attention to checking the effectiveness of the safety limit switch on the drum, and whether the wire rope pressure plates on the drum are tightened and the number of pressure plates is appropriate.

6. Lubrication: Check the oil quality and quantity in all parts, and add or replace lubricating oil as required.

7. Inspection of bridge crane pulleys: Focus on whether the wear at the bottom of the groove exceeds the standard and whether there are cracks in the cast iron pulleys. The balance wheel of the lifting mechanism pulley block is easily overlooked because it does not move under normal circumstances. Therefore, its rotational flexibility must be checked before installation. Otherwise, the length and tension of the left and right lifting wire ropes cannot be automatically adjusted by the balance wheel during installation, increasing the difficulty and danger of adjusting the lifting ropes at high altitudes.