What will happen if the lifting mechanism lacks power

The main reasons for crane "slip hook" :
(1) The lifting mechanism brake parts of the pin shaft, pin holes and brake lining wear seriously and exceed the relevant provisions, resulting in the braking torque can not hold the brake wheel, there is a "slip hook".
(2) The working surface of the brake wheel of the lifting mechanism or the brake tile is lined with oil, resulting in a smaller friction coefficient and a smaller braking torque, and a "slip hook".
(3) The active part of the lifting mechanism brake has a blocking phenomenon, resulting in a smaller braking torque and a "slip hook".
(4) The braking wheel of the lifting mechanism has a large radial runout, which exceeds the provisions of the technical standards, causing it to be difficult to adjust, the braking torque cannot meet the requirements, and the "slip hook" appears.
(5) The tension adjusted by the main spring of the lifting mechanism brake is small (too loose), the braking torque is reduced, and the "slip hook" appears.
(6) The lock nut of the main spring of the lifting mechanism brake is loose, so that the working length of the main spring of the brake is longer, the tension is smaller, and the braking torque is reduced, and the "slip hook" appears.
(7) The main spring of the lifting mechanism brake is damaged and broken, so that the braking torque is reduced; Or a long time of use, the spring has fatigue failure, the tension becomes smaller, and the "slip hook" appears.
(8) There are supports under the weight of the long stroke brake, so that the stroke and braking torque are reduced, and the "slip hook" appears.
(9) The lifting mechanism brake "slip hook" caused by electrical failure