What is the proper position of the fifth wheel when coupling?

The proper position of the fifth wheel when coupling is that it should be tilted down toward the end of the tractor. This configuration ensures that the trailer can be easily aligned and lowered onto the fifth wheel. When the fifth wheel is angled down, it allows the kingpin of the trailer to slide under the locking mechanism of the fifth wheel, facilitating a secure coupling between the tractor and the trailer.

A flat and level fifth wheel may not provide the proper angle for the kingpin to engage correctly, while a tilted up fifth wheel could prevent the trailer from coupling at all. Having the fifth wheel tilted correctly is essential for safe and effective coupling, ensuring that the trailer is securely attached to the tractor before any movement.