Which parts of the chain hoist need to be replaced first after it rusts?

Which parts of the Chain Hoist need to be replaced first after it rusts?
As an important lifting tool, the maintenance and care of the chain hoist is very important. Especially when the chain hoist rusts, the replacement priority of some key parts needs to be increased to ensure the normal operation and safe use of the tool. The following are the parts that need to be replaced first after the chain hoist rusts according to the search results:

1. Transmission gear
The transmission gear is one of the core components of the chain hoist and is responsible for transmitting force to the lifting chain. If the gear has cracks, broken teeth or the tooth surface wear reaches 30% of the original tooth thickness, the gear should be scrapped. Therefore, once the gear rusts, its wear should be checked immediately and replaced according to the situation.

2. Lifting chain
The lifting chain is the part of the chain hoist that directly bears the load. If the chain undergoes plastic deformation, the elongation reaches 5% of the original factory or the chain jam occurs, and the chain ring diameter wears 10% of the original diameter, it should be scrapped. Rust may cause the strength of the chain to decrease and increase the risk of breakage, so it needs to be checked and replaced first.

3. Brake pads
The brake pads are key components for controlling the lifting speed of the chain hoist and maintaining the stability of the heavy objects. If the brake pads do not meet the required braking torque or are severely worn, they should be replaced immediately. Rust will reduce the braking effect and affect safety, so the inspection and replacement of brake pads cannot be ignored.

4. Hooks
The hook is the part of the chain hoist used to lift objects. Due to long-term use or improper use, the hook may be damaged or cracked and needs to be replaced. Damage to the hook will directly threaten the safety of the lifting operation, so once the hook is found to be rusty or damaged, it should be replaced immediately.

5. Bearings
The bearings are important components in the chain hoist that bear the load and ensure the flexibility of movement. Damage to the bearings will affect the normal operation of the chain hoist, increase maintenance costs and safety hazards. Therefore, once the bearings are rusted or damaged, they should be replaced immediately

6. Friction pads
The friction pads are key components in the braking system of the chain hoist and are responsible for generating braking force. The wear of friction plates will directly affect the braking performance of the chain hoist, so they need to be checked regularly and replaced in time.

7. Casing and protective cover
Although the casing and protective cover of the chain hoist are not directly involved in the lifting operation, they protect the internal machinery from the external environment. Rusty casing and protective cover may cause moisture and impurities to invade, affecting the operation of internal components, so they also need to be replaced first.

Conclusion
The maintenance and care of the chain hoist is the key to ensure its safe and effective operation. After the chain hoist is rusted, the transmission gear, lifting chain, brake pad, hook, bearing, friction plate, casing and protective cover and other components need to be checked and replaced first. The timely replacement of these parts can not only extend the service life of the chain hoist, but also ensure the safety of the lifting operation. Therefore, users should regularly inspect and maintain the chain hoist, and take immediate action if any problems are found.

After replacing these parts, how to perform daily maintenance to prevent rust?

After replacing the key parts of the hand chain hoist, it is crucial to perform daily maintenance to prevent rust. Here are some specific maintenance measures:

1. Regular cleaning
Remove dirt: Use a soft brush or soft cloth to clean the hand chain hoist regularly to remove dust, dirt and oil stains on the surface.
Chain cleaning: Clean the chain of the hand chain hoist in particular to remove debris and moisture that may have accumulated.

2. Anti-rust treatment
Oil application: Apply anti-rust oil to the metal parts of the hand chain hoist, especially in key parts such as chains, gears and bearings.
Check the coating: Regularly check the anti-rust coating on the surface of the hand chain hoist. If it is worn or peeled off, it should be re-sprayed in time.

3. Storage conditions
Dry environment: Make sure the hand chain hoist is stored in a dry and well-ventilated environment to avoid moisture that causes rust.
Avoid direct sunlight: Long-term exposure to sunlight may cause the material of the hand chain hoist to age and should be stored in a cool place.

4. Regular inspection
Check wear: Regularly check the various parts of the chain hoist, especially the replaced parts, to ensure that they are not excessively worn or damaged.
Check fasteners: Make sure all fasteners, such as nuts, bolts, etc., are secure and not loose.

5. Avoid overloading
Observe load limits: Do not exceed the rated load of the chain hoist. Overloading will accelerate component wear and increase the risk of rust.

6. Operating specifications
Correct operation: Make sure to operate according to the operating manual of the chain hoist. Improper operation may cause component damage and rust.

7. Regular lubrication
Chain lubrication: Regularly lubricate the chain of the chain hoist to reduce friction and extend the life of the chain.
Bearing lubrication: Ensure that the bearings are properly lubricated to reduce wear and prevent rust.

8. Avoid contact with corrosive substances
Chemical protection: Avoid contact between the chain hoist and corrosive chemicals, which may damage the anti-rust coating and accelerate the rusting process.

9. Regular maintenance
Professional maintenance: Regularly ask professionals to maintain and inspect the chain hoist to ensure that it is in optimal condition.

10. Record maintenance history
Maintenance records: Record all maintenance and replacement parts history, which helps to track the condition of the chain hoist and provide reference when needed.
By following these daily maintenance measures, you can effectively extend the life of the chain hoist and reduce the risk of rust. Remember, prevention is always easier and cheaper than repair.