How to adjust the brake of L0t electric hoist?

/kloc-The big nut behind the electric hoist motor of 0/0 ton or more is loose outward (reversely). The looser the nut, the tighter the brake. Generally, 1-2 rpm is enough. The brake failure of electric hoist will cause the hook to slide when it is empty, which is a potential dangerous accident. At this time, it is necessary to adjust the brakes.

It is necessary to remove the tail cover, unscrew the four screws fixing the adjusting nut, turn the adjusting screw clockwise to the limit position with a wrench, then turn it counterclockwise for one turn, and then install the fastening screw.

If the spring is used for a long time and the elasticity is insufficient, the problem can be solved by replacing the spring. Whether it is caused by long-term overload, adjust the brake and re-tighten the big nut behind the motor. If it doesn't work, neither does the spring.