Pins and Keepers
Be sure to conduct this inspection to make sure that pins and keepers are installed correctly for efficient and safe operation. For more information see: factory specifications from manufacturer.
Location/Type/Number
Note the locations and type of pins and keepers on the rig. Write the quantity inspected for many in one location.
Pin Diameter
- Check that the point taper on the pin is completely through the assembly with the outside diameter of the pin in contact with the internal diameter of the connection.
Pin Length
- Check that pins are not so long that they can be bent or otherwise damaged making them difficult or impossible to remove.
Pin Condition
- Check that the pin head has a stop collar or stop pin to prevent the pin from being driven too far into the connection.
- Make sure that the head of the pin is not mushroomed to the point that fragments could be broken off as the pin is being driven. Also inspect the pointed end of the pin for damage caused by excessive hammering. If the pin must be hammered to the point where mushrooming occurs, the connection is misaligned.
Knowledge Check Choose the best answer for the question.
9-6. What should be assumed if the pin must be hammered to the point where mushrooming occurs?
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