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Daily maintenance and care methods for crane hooks

2025-07-29 01:19:14

To ensure the safety and service life of the crane hook, regular inspection, lubrication, rust prevention and functional testing must be carried out . The following are detailed maintenance and care methods:

1. Daily inspection (pre-shift inspection)

  1. Appearance inspection

    • Check whether there are cracks, deformation or rust on the surface of the hook .

    • Measure the opening (if it exceeds 10% of the original size, it should be scrapped).

    • Check the dangerous section for wear (wear ≥ 5% requires replacement).

  2. Anti-unhooking device inspection

    • Make sure the tongue (safety card) is intact and the spring elasticity is normal.

    • Test the automatic closing function to ensure reliable locking.

  3. Connection inspection

    • Check whether the bolts, pins and nuts are loose or worn.

    • Confirm that the pulley block and beam have no abnormal wear or deformation.

  4. Functional testing

    • Perform no-load lifting test to observe whether there is any abnormal noise or jamming .

2. Regular lubrication (key maintenance)

Lubrication parts Lubrication cycle Lubricant Type method
Rotary bearings Every 500 hours Molybdenum disulfide lithium grease (high temperature) High pressure grease injection gun
Threaded connection Every 3 months General purpose lithium grease Apply a thin layer
Anti-unhooking device hinge point per month Spray lubricant (WD-40) Spray lubrication

Note:

  • Clean oil and dust before lubrication to avoid contaminating the wire rope.

  • The bearing grease injection volume should not exceed 60% to prevent overheating.

3. Anti-rust treatment (long-term maintenance)

  1. Cleaning the surface

    • Remove rust with a wire brush or sandpaper , then degrease with acetone/alcohol .

  2. Rust prevention method selection

    environment Anti-rust measures Maintenance cycle
    Ordinary indoor Cover with anti-rust oil or grease Every 6 months
    High humidity/salt spray Hot dip galvanizing (80μm and above) Check every 3 years
    Chemical corrosion Spraying fluorocarbon coating (PTFE) Check every 2 years

  3. Special environment treatment

    • Marine environment : Use Dacromet coating (salt spray resistance for more than 1000 hours).

    • Low temperature environment : Use cold-resistant grease (maintains lubricity at -30°C).

4. Key Component Replacement Standards

  1. Hook scrapping conditions (GB/T 10051.1)

    • Cracks or breaks (of any size).

    • The opening is increased by >10% (compared to the original size).

    • Dangerous section wear > 5% .

  2. Replacement standard for anti-unhooking device

    • The tongue is deformed, the spring is broken or it cannot close automatically.

5. Intelligent maintenance technology (optional)

  1. Internet of Things (IoT) Monitoring

    • Install strain sensors to monitor the stress status of the hook in real time.

    • Use humidity sensors to warn of corrosion risks.

  2. Automatic lubrication system

    • Suitable for high altitude or dangerous areas, regular and quantitative grease injection.

6. Maintenance records and management

  • Establish maintenance files to record each inspection, lubrication and replacement.

  • If any hidden dangers are found, stop using the equipment immediately and report to the maintenance department.

Summarize

✅Daily  inspection : appearance, anti-unhooking, connectors, functional testing.
✅Regular  lubrication : bearings, threads, hinges, use appropriate lubricants.
✅Rust  -proof treatment : choose galvanizing, coating or anti-rust oil according to the environment.
✅Smart  maintenance : IoT monitoring + automatic lubrication to improve safety.

Following the above methods can greatly reduce the risk of hook failure and ensure the safety of lifting operations!

To ensure the safety and service life of the crane hook, regular inspection, lubrication, rust prevention and functional testing must be carried out . The following are detailed maintenance and care methods:

1. Daily inspection (pre-shift inspection)

  1. Appearance inspection

    • Check whether there are cracks, deformation or rust on the surface of the hook .

    • Measure the opening (if it exceeds 10% of the original size, it should be scrapped).

    • Check the dangerous section for wear (wear ≥ 5% requires replacement).

  2. Anti-unhooking device inspection

    • Make sure the tongue (safety card) is intact and the spring elasticity is normal.

    • Test the automatic closing function to ensure reliable locking.

  3. Connection inspection

    • Check whether the bolts, pins and nuts are loose or worn.

    • Confirm that the pulley block and beam have no abnormal wear or deformation.

  4. Functional testing

    • Perform no-load lifting test to observe whether there is any abnormal noise or jamming .

2. Regular lubrication (key maintenance)

Lubrication parts Lubrication cycle Lubricant Type method
Rotary bearings Every 500 hours Molybdenum disulfide lithium grease (high temperature) High pressure grease injection gun
Threaded connection Every 3 months General purpose lithium grease Apply a thin layer
Anti-unhooking device hinge point per month Spray lubricant (WD-40) Spray lubrication

Note:

  • Clean oil and dust before lubrication to avoid contaminating the wire rope.

  • The bearing grease injection volume should not exceed 60% to prevent overheating.

3. Anti-rust treatment (long-term maintenance)

  1. Cleaning the surface

    • Remove rust with a wire brush or sandpaper , then degrease with acetone/alcohol .

  2. Rust prevention method selection

    environment Anti-rust measures Maintenance cycle
    Ordinary indoor Cover with anti-rust oil or grease Every 6 months
    High humidity/salt spray Hot dip galvanizing (80μm and above) Check every 3 years
    Chemical corrosion Spraying fluorocarbon coating (PTFE) Check every 2 years

  3. Special environment treatment

    • Marine environment : Use Dacromet coating (salt spray resistance for more than 1000 hours).

    • Low temperature environment : Use cold-resistant grease (maintains lubricity at -30°C).

4. Key Component Replacement Standards

  1. Hook scrapping conditions (GB/T 10051.1)

    • Cracks or breaks (of any size).

    • The opening is increased by >10% (compared to the original size).

    • Dangerous section wear > 5% .

  2. Replacement standard for anti-unhooking device

    • The tongue is deformed, the spring is broken or it cannot close automatically.

5. Intelligent maintenance technology (optional)

  1. Internet of Things (IoT) Monitoring

    • Install strain sensors to monitor the stress status of the hook in real time.

    • Use humidity sensors to warn of corrosion risks.

  2. Automatic lubrication system

    • Suitable for high altitude or dangerous areas, regular and quantitative grease injection.

6. Maintenance records and management

  • Establish maintenance files to record each inspection, lubrication and replacement.

  • If any hidden dangers are found, stop using the equipment immediately and report to the maintenance department.

Summarize

✅Daily  inspection : appearance, anti-unhooking, connectors, functional testing.
✅Regular  lubrication : bearings, threads, hinges, use appropriate lubricants.
✅Rust  -proof treatment : choose galvanizing, coating or anti-rust oil according to the environment.
✅Smart  maintenance : IoT monitoring + automatic lubrication to improve safety.

Following the above methods can greatly reduce the risk of hook failure and ensure the safety of lifting operations!

To ensure the safety and service life of the crane hook, regular inspection, lubrication, rust prevention and functional testing must be carried out . The following are detailed maintenance and care methods:

1. Daily inspection (pre-shift inspection)

  1. Appearance inspection

    • Check whether there are cracks, deformation or rust on the surface of the hook .

    • Measure the opening (if it exceeds 10% of the original size, it should be scrapped).

    • Check the dangerous section for wear (wear ≥ 5% requires replacement).

  2. Anti-unhooking device inspection

    • Make sure the tongue (safety card) is intact and the spring elasticity is normal.

    • Test the automatic closing function to ensure reliable locking.

  3. Connection inspection

    • Check whether the bolts, pins and nuts are loose or worn.

    • Confirm that the pulley block and beam have no abnormal wear or deformation.

  4. Functional testing

    • Perform no-load lifting test to observe whether there is any abnormal noise or jamming .

2. Regular lubrication (key maintenance)

Lubrication parts Lubrication cycle Lubricant Type method
Rotary bearings Every 500 hours Molybdenum disulfide lithium grease (high temperature) High pressure grease injection gun
Threaded connection Every 3 months General purpose lithium grease Apply a thin layer
Anti-unhooking device hinge point per month Spray lubricant (WD-40) Spray lubrication

Note:

  • Clean oil and dust before lubrication to avoid contaminating the wire rope.

  • The bearing grease injection volume should not exceed 60% to prevent overheating.

3. Anti-rust treatment (long-term maintenance)

  1. Cleaning the surface

    • Remove rust with a wire brush or sandpaper , then degrease with acetone/alcohol .

  2. Rust prevention method selection

    environment Anti-rust measures Maintenance cycle
    Ordinary indoor Cover with anti-rust oil or grease Every 6 months
    High humidity/salt spray Hot dip galvanizing (80μm and above) Check every 3 years
    Chemical corrosion Spraying fluorocarbon coating (PTFE) Check every 2 years

  3. Special environment treatment

    • Marine environment : Use Dacromet coating (salt spray resistance for more than 1000 hours).

    • Low temperature environment : Use cold-resistant grease (maintains lubricity at -30°C).

4. Key Component Replacement Standards

  1. Hook scrapping conditions (GB/T 10051.1)

    • Cracks or breaks (of any size).

    • The opening is increased by >10% (compared to the original size).

    • Dangerous section wear > 5% .

  2. Replacement standard for anti-unhooking device

    • The tongue is deformed, the spring is broken or it cannot close automatically.

5. Intelligent maintenance technology (optional)

  1. Internet of Things (IoT) Monitoring

    • Install strain sensors to monitor the stress status of the hook in real time.

    • Use humidity sensors to warn of corrosion risks.

  2. Automatic lubrication system

    • Suitable for high altitude or dangerous areas, regular and quantitative grease injection.

6. Maintenance records and management

  • Establish maintenance files to record each inspection, lubrication and replacement.

  • If any hidden dangers are found, stop using the equipment immediately and report to the maintenance department.

Summarize

✅Daily  inspection : appearance, anti-unhooking, connectors, functional testing.
✅Regular  lubrication : bearings, threads, hinges, use appropriate lubricants.
✅Rust  -proof treatment : choose galvanizing, coating or anti-rust oil according to the environment.
✅Smart  maintenance : IoT monitoring + automatic lubrication to improve safety.

Following the above methods can greatly reduce the risk of hook failure and ensure the safety of lifting operations!

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