(1) Before use, find out its allowable load, check whether there are cracks and damages in various parts of the pulley, and check whether the pulley rotates flexibly.

(2) After the pulley is assembled, slowly apply force; After the rope is tightened, check whether all parts are in good condition and whether there is rope jamming. If there is anything wrong, correct it immediately and don't force yourself to work.

(3) The center of the hook (or lifting ring) of the pulley block should be in a vertical line with the center of gravity of the lifting component, so as to avoid the instability of the component after lifting; The minimum distance between the upper and lower pulleys of the pulley block is generally 100 ~ 1200mm.

(4) The pulley block should be cleaned before and after use, and the axle should be lubricated to reduce wear and prevent corrosion.