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Writing the operation manual of the crane hook is an important technical document to ensure safe operation and standardized operation. The manual should be clear, comprehensive, and comply with relevant national standards (such as GB/T 5972-2016 "crane hook" and "Technical Specifications for Safety of Special Equipment"). The following is a detailed writing guide:

1. Basic structure of the operation manual

1. Cover

   • Equipment name (e.g. "Crane Hook Operation and Maintenance Manual")

   • Model/Specification (e.g. SWL 10t, GB/T 10051 standard)

   • Manufacturer information and contact details

   • Version number and release date

2. Table of contents

   • Classify by chapters and appendices and mark the pages.

3. Preface/Safety Warning

   • Emphasize the authority of the manual and state that "operating procedures must be strictly followed."

   • List high-risk warnings (e.g., “overloading is strictly prohibited”, “welding repairs are prohibited”).

2. Core Content Chapters

1. Hook technical parameters and structure

• Basic parameters : rated load, material (such as alloy steel DG20), and applicable crane type.

• Structural diagram : mark the hook body, hook handle, bearing, anti-slip device and other components (with cross-sectional view).

• Working principle : Explain the rotation mechanism and load distribution principle of the hook.

2. Safe operation process

• Pre-operation inspection :

  • Visual inspection (cracks, deformation, wear).

  • Functional test (rotational flexibility, effectiveness of anti-slip devices).

• Standard operating procedures :

  1. Confirm that the load weight is ≤ rated load.

  2. The hook is aligned vertically to the center of gravity of the load.

  3. Lift slowly and try to lift it 0.5 meters above the ground.

  4. Keep steady during operation and avoid sudden stops/accelerations.

• End operation : clean the hook after unloading and return it to a safe height.

3. Prohibited Behaviors and Risk Control

• Prohibited items :

  • Pull sideways, diagonally or impact the hook.

  • Unauthorized modification/welding of the hook structure.

• Risk scenarios :

  • Anti-collision measures when multiple cranes work together.

  • Warning about material strength degradation in high temperature environments.

4. Maintenance and care

• Daily maintenance :

  • Clean and lubricate (e.g. add lithium-based grease to the hook neck bearing every month).

  • Check the wear marks (if the wear on the dangerous section is ≥10%, it will be scrapped).

• Regular testing :

  • Magnetic particle inspection (crack detection) is performed every 6 months.

  • Annual load test (1.25 times static load test).

5. Troubleshooting and scrapping standards

• Common faults :

  Fault phenomenon	Possible causes	Treatment measures
  Rotation stuck	Bearing lacks oil or is corroded	Clean and lubricate
  Hook deformation	Overload or impact	Deactivate immediately and replace

• Scrap standards :

  • The hook body has cracks or plastic deformation.

  • The opening increases by 15% over the original size.

6. Emergency measures

• Emergency handling :

  • Wire rope broken: Sound the emergency whistle and evacuate the danger zone.

  • Load shaking: Slowly lower the hook to the ground and adjust the center of gravity.

3. Appendix and Supplementary Information

1. List of relevant standards :

   • GB/T 10051-2010 Lifting hook

   • TSG Q7015-2016 "Rules for Periodic Inspection of Lifting Machinery"

2. Inspection record form template :

   • Date, inspection items (such as anti-slip devices), results, and signature of the inspector.

3. Schematic diagram and symbol description :

   • Hook force analysis diagram and command hand gesture diagram.

4. Notes on Writing

1. Language specification :

   • Use concise directive statements (such as "must" and "must not") and avoid vague descriptions.

2. Combination of pictures and text :

   • Key steps are accompanied by flow charts or photos (such as comparison of correct/incorrect hanging).

3. Version management :

   • Note the revision records to ensure the latest version of the manual is used on site.

4. User adaptation :

   • For operators with different cultural levels, video QR code links can be added.

5. Sample snippet

Title: Daily inspection process of hooks

1. Visual inspection : Check the hook for cracks and rust.

2. Rotation test : Manually rotate the hook to confirm there is no obstruction.

3. Measure the opening : Use a caliper to measure. If it exceeds the original size by 15%, it will be scrapped.

4. Record results : Fill in the Hook Inspection Form (Appendix B).

In summary,
the operation manual should be both technically rigorous and easy to use, ensuring that even non-professionals can operate safely. Regular review and update of the manual content, and supplementary warning instructions based on accident cases can further improve safety.