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A/C Tools

Air Compressors

King Pin Gauge

How to use the King Pin Gauge:
How to Measure King Pin Wear:
1. Slide the round opening in the gauge over the King Pin to the “Neck” area.
If the gauge fits around the “Neck” at the minimum neck area. The king pin is worn beyond serviceable limits according to the SAE J700 standard.
2. Slide the round opening in the gauge over the King Pin to the “Shoulder” area.
If the gauge fits around the “Shoulder” at the minimum neck area. The king pin is worn beyond serviceable limits according to the SAE J700 standard.
How to Measure King Pin Height and Squareness
1. Place the gauge 90 degrees to the bolster plate.
If the gauge will not fit into the king pin recesses, the height of the king pin is incorrect or the king pin or bolster plate is bent,
2. Rotate the gauge around the king pin 360 degrees to check for straightness of the king pin and bolster plate.

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