How to maintain cranes in winter?

Crane is a commonly used lifting equipment on the construction site, used for hoisting construction materials. In order to ensure the safe operation of the crane, the daily maintenance of the crane is particularly important, especially as winter is approaching. The use of cranes in winter is different from other seasons, and there are many special considerations.
As we all know, the use of crane electric hoist has environmental requirements, such as not working in a humid environment. However, in some special cases, the electric hoist must be operated in a humid environment. At this moment, we must do a good job in the maintenance of the electric hoist. How can we prevent these defects?

The lubricating oil of the gearbox of the crane must be replaced with anti-freeze lubricating oil as required; pay attention to fire prevention when heating the crane cab; the connecting bolts of the main components are not loose; the wear of the crane wire rope and the threading and winding of each pulley meet the standard requirements; The power cord is not damaged; the verticality error of the hoisting machinery should meet the standard requirements.