When coupling a truck-tractor to a semi-trailer, what should be done if there is slack during the tug test?

When performing a tug test while coupling a truck-tractor to a semi-trailer, noticing slack indicates that there may be an issue with the coupler not being properly engaged. It is essential to address any slack before proceeding, as this could lead to dangerous situations on the road, including separation of the trailer from the tractor during transport. Making corrections ensures that all components are securely connected, reducing the risk of accidents and ensuring the safety of the vehicle and its cargo.

Adjusting the height of the trailer may be necessary in some cases to ensure proper alignment, but it does not directly address the issue of slack in the coupling. Similarly, checking the trailer’s brake system is important but is not relevant to the immediate concern of secure coupling. Proceeding with the connection despite noticing slack poses significant safety risks and is not a responsible practice. Hence, recognizing and correcting slack during the tug test is crucial for ensuring a safe and secure coupling.