What is the correct spacing that should exist between the upper and lower fifth wheel when coupling a converter dolly?

When coupling a converter dolly, the correct spacing between the upper and lower fifth wheel should be none. This means that the two fifth wheels should be in direct contact when properly coupled. Proper alignment and contact are crucial for safely transferring the weight and maintaining stability while towing the rear trailer. If there is space between the fifth wheels, it can lead to instability during transport, potential damage to the couplings, and an increased risk of separation while on the road.

This practice ensures that the connection is secure, reducing the risk of accidents due to improper coupling. In this situation, there are no gaps; the dolly's upper fifth wheel should sit snugly on the lower fifth wheel to promote a stable and secure attachment. Hence, having no space is the standard requirement for ensuring safety and operational efficiency in double and triple configurations.