After coupling a trailer, how much space should be between the upper and lower fifth wheel?

When coupling a trailer, it is essential that there is no space between the upper and lower fifth wheel. This complete contact is crucial for several reasons. First, if there is any gap, it could indicate that the trailer is not securely coupled, which can lead to increased wear on the coupling components and a greater risk of uncoupling while in transit. A proper coupling ensures that weight is distributed evenly, which enhances the stability of the vehicle-trailer combination.

Having no space also helps in the accurate alignment and engagement of the fifth wheel components, ensuring that they function effectively during turns and when the vehicle is in motion. Additionally, proper coupling is part of a safety check that each driver must perform, helping to prevent accidents caused by improper attachment. Properly coupled equipment can also lead to better handling and performance on the road.