Daily maintenance items

The first is the maintenance of the crane pulley: the pulley shield shall be firmly installed without damage or obvious deformation; the pulley shall rotate flexibly, smoothly and without cracks; the rim part shall be free from defects and wire rope damage; the uneven wear of the wheel groove shall reach 3mm; or the wear of the wall thickness shall reach 20% of the original wall thickness, or the reduction of the diameter at the bottom of the wheel groove shall reach 50% of the diameter of the wire rope, the pulley shall be scrapped.

Secondly, the maintenance of the crane hook: the wear of the dangerous section of the hook should not exceed 10% of the original size; the wear of the plate hook bushing should not exceed 50% of the original size; the wear of the spindle should not exceed 5% of the original size; the surface should be smooth and free of defects such as cracks and acute angles. Repair welding is not allowed for the defects on the hook; cracks are strictly prohibited on the dangerous section of the lower part of the hook and the undercut section of the threaded part of the hook tail; the hook should rotate flexibly, and the positioning bolts and split pins must be fastened in good condition.

Finally, the maintenance of the crane wire rope: the fixed pressing plate at the end of the wire rope should be & Ge; 2; the length of the wire rope must ensure that when the hook is lowered to the low position (including the pit), the remaining wire rope on the drum should not be less than 3 circles; the wire rope should be free of serious deformation such as kink, dead angle, hard bending, plastic deformation, hemp core out, and the lubrication condition is good.