What maintenance and upkeep measures should be implemented for the gearbox of an imported hook-type electric chain hoist?

　　As everyone knows, steel should not be exposed for extended periods to damp, cold, or chemically aggressive environments, as it is prone to corrosion and rust. The same principle applies to imported electric hoists. In particular, the gearboxes of imported electric hoists require even more rigorous maintenance and upkeep—measures that are taken in advance to prevent degradation of the hoist’s performance. This paper will focus on outlining the specific maintenance and care procedures for the gearboxes of imported electric hoists.

　　Maintenance precautions for imported hook-type electric chain hoist gearboxes:

　　1. For imported hook-type electric chain hoists equipped with gearboxes that use automotive lubricating oil, the grease level must be checked after 500 hours of operation. Thereafter, the grease condition shall be inspected regularly every three months, and grease shall be replenished as necessary to address any deficiencies.

　　2. For imported hook-type electric chain hoists intended for outdoor use, it is imperative to install waterproof and rainproof protection specifically for the hoist as a whole, with particular emphasis on the motor and the reduction gearbox.

　　3. For imported electric hook-type chain hoists that are not used for an extended period, it is essential to carry out thorough rust-prevention treatment and regular cleaning and maintenance; additionally, operate the hoist left and right for 1–3 minutes to maintain its performance.

　　4. In the event of gearbox failure or other similar issues, oil leakage may occur, leading to accelerated wear of the shaft journals and a significant reduction in the service life of the imported electric hoist. It is therefore recommended to arrange for prompt repair.

　　5. If the drive chain makes a clicking sound during operation, applying a small amount of automotive engine oil can eliminate the noise; however, once the noise has been eliminated, do not reapply automotive engine oil.

　　6. During the dynamic load test, the rated net load shall be applied to conduct repeated adjustments and up-and-down movement tests. After the test, inspect the gear transmission components and the connections of the household appliance components to ensure there are no issues and that they operate reliably.

　　7. During operation, it is strictly prohibited to use the equipment under any prohibited conditions or when the operating load exceeds the rated capacity or the maximum permitted reclosing frequency of 120 times per hour.

　　8. Do not press two buttons simultaneously that would cause the imported electric hoist to move in opposite directions.

　　The relationship between the quality and service life of hook-type electric chain hoists:

　　1. Manufacturer-related factors: In essence, the value of the product and the quality of its materials directly determine the service life of the electric hoist, such as the grade of the transmission chain and the brand of the electric motor and electrical components.

　　2. Main reasons for proper usage: Some customers lack sufficient practical operating experience or have bad habits that can damage the electric hoist, thereby shortening its service life.

　　3. Maintenance and Servicing: During operation, electric hoists require appropriate maintenance and servicing, such as regularly lubricating the drive chain and rolling bearings. This not only enhances the hoist’s efficiency but also significantly extends its service life.

　　4. Effective Storage: The preferred storage method is to keep the equipment in a dry, well-ventilated environment; it should not be piled up haphazardly. Items must be arranged neatly and uniformly, and common malfunctions of electric hoists should be clearly labeled.