What action should not be taken when backing under a trailer?

When backing under a trailer, expecting the trailer to tilt is not a recommended action. This is because assuming that the trailer will tilt can lead to a lack of proper attention to the actual positioning and alignment needed to successfully and safely connect the truck to the trailer. It is essential for the driver to focus on correctly aligning the truck with the trailer rather than anticipating movements that may not necessarily occur.

In the backing process, it is crucial to remain vigilant for obstacles, check for clearance, and ensure proper alignment to facilitate a smooth and safe maneuver. Keeping attention on the trailer’s position and surroundings allows for a more precise connection, reducing the risk of accidents or mishaps during the backing process.