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(1) Disassemble and inspect the hook, shaft, horizontal single-girder overhead crane, pulley, and bearing and clean and lubricate them

(2) Check the wear condition of dangerous sections

(3) Test of the hook

(4 ) Plate hook maintenance

(5) There are no cracks in the hook, horizontal single-girder bridge crane, and pulley shaft. The threaded part should not be loose. The bearings are intact. When rotating the pulley, any knife marks or cracks at the thread relief groove should be replaced.

(6) If the wear of the dangerous section exceeds 10% of the original height, it should be replaced.

(7) After overhaul, the hook should be tested and inspected. The hook should be suspended for 10 minutes at 1.25 times the rated load. The elastic opening of the hook mouth should not exceed 0.25% of the hook mouth size. There should be no permanent deformation and cracks after unloading; (8) After the plate hook is riveted, the gap between the plates should not be greater than 0.3mm.

(1) Disassemble and inspect the hook, shaft, horizontal single-girder overhead crane, pulley, and bearing and clean and lubricate them

(2) Check the wear condition of dangerous sections

(3) Test of the hook

(4 ) Plate hook maintenance

(5) There are no cracks in the hook, horizontal single-girder bridge crane, and pulley shaft. The threaded part should not be loose. The bearings are intact. When rotating the pulley, any knife marks or cracks at the thread relief groove should be replaced.

(6) If the wear of the dangerous section exceeds 10% of the original height, it should be replaced.

(7) After overhaul, the hook should be tested and inspected. The hook should be suspended for 10 minutes at 1.25 times the rated load. The elastic opening of the hook mouth should not exceed 0.25% of the hook mouth size. There should be no permanent deformation and cracks after unloading; (8) After the plate hook is riveted, the gap between the plates should not be greater than 0.3mm.