What could happen if the trailer is too high when attempting to couple?

When the trailer is too high when attempting to couple, it may not couple correctly. Proper coupling involves ensuring that the height of the trailer’s kingpin aligns with the tractor’s fifth wheel. If the trailer is too high, the kingpin may not engage with the fifth wheel correctly, preventing a secure connection. This misalignment could lead to difficulties in achieving a proper lock, which is crucial for safe driving.

Proper coupling ensures that the forces from the tractor can be transferred effectively to the trailer. If the trailer were to remain improperly coupled due to being too high, it could lead to separation while driving, creating a serious safety hazard. Therefore, confirming the correct height during this process is vital for ensuring that the connection is secure and reliable, allowing for safe operation on the road.