What is done to adjust a fifth wheel hitch?

To adjust a fifth wheel hitch properly, closing the jaw mechanism on a test pin and removing any slack is essential. This process ensures that the fifth wheel is securely coupled to the trailer, which is critical for safe operation. When the jaws of the fifth wheel hitch close around the kingpin of the trailer, they should fit snugly without excessive play, which can lead to instability and shifting of the trailer during transit.

Using a test pin provides a reliable way to ensure that the jaws are operating correctly and can securely grip the kingpin. If there is slack, it can lead to poor handling, increased wear on components, and potential hazards on the road. Thus, performing this adjustment is a fundamental step in maintaining a safe and functional fifth wheel hitch setup.