Lorry-mounted Crane Hook Blocks

1. The crane shall not use cast hooks. 2. Repair welding of the hook is strictly prohibited. 3. The surface of the hook should be smooth and clean without peeling, sharp Angle, burr and crack. 4. The hook shall be equipped with anti-stripping device. The backstop pawl shall not be opened when...

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1. The crane shall not use cast hooks.


2. Repair welding of the hook is strictly prohibited.


3. The surface of the hook should be smooth and clean without peeling, sharp Angle, burr and crack.


4. The hook shall be equipped with anti-stripping device.

The backstop pawl shall not be opened when loading the hook, and the size reduction value of the rear hook after installing the pawl shall not exceed 10% of the size of the hook.

The morphology of the anti - trip pawl should be consistent with the end of the hook.


5. The hook should be scrapped if one of the following situations occurs:


1) surface cracks or cracks.


2) the dangerous sections such as the hook tail and thread part and the hook bar have permanent deformation.


3) wear on the section of the hanging rope exceeds 10% of the original height.


4) the opening degree is 15% higher than the original size.

Torsional deformation opening more than 10 °.


5) the sleeve of plate hook shall be scrapped when the wear reaches 50% of the original size.


6) when the wear of the plate hook mandrel reaches 5% of the original size, the mandrel should be scrapped.



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