The initial manufacturing quality determines the service life of the crane electric hoist. However, if the service life of the electric hoist is to be extended in the later stage, good protection and maintenance are indispensable. Proper protection and maintenance can not only extend the service life but also enhance the flexibility of the electric hoist's operation.

There are many application constraints for electric hoists. Generally, a test run is required before use. Only after a series of standard no-load operations can they be used normally. For electric hoists, it is necessary to pay special attention to protecting the brake and reducer, which are important components of the electric hoist and also the parts that are prone to problems. We should check and protect them regularly. If there is any damage, repair or replace it in time.

The maintenance work of electric hoists is divided into maintenance during the installation process and maintenance during the use process after installation. When installing a new device or removing an electric hoist, to ensure its normal operation, it is necessary to carry out no-load operation. Power-on operation cannot be carried out before the device is debugged. Power-on no-load operation can be conducted only after the device debugging is completed. Regarding the protection and maintenance of electric hoists in use, once any abnormal operation of the electric hoist is detected, all the values during its operation should be recorded in a timely manner, and then a technical analysis should be conducted to ensure that the rated load is within the load required for debugging. At the same time, it is also necessary to pay attention to protecting the cleanliness of the oil, ensuring that the oil during the operation of the electric hoist is clean and free of impurities, flat and in an appropriate amount.

In conclusion, it is very necessary to improve and standardize the protection and maintenance procedures of electric hoists. Before using an electric hoist, scientific debugging operations must be carried out. Then, during maintenance, attention should be paid to the inspection and repair of the brake and reducer. If this is done for a long time, its service life can be greatly extended and its efficiency can be improved.