When raising the landing gear before driving, how should it be lifted?

The correct answer is to raise the landing gear completely up before driving. This ensures that the landing gear is fully retracted, preventing any potential interference with the truck's movement or stability on the road. When the landing gear is left partially extended or lifted only until it clears the pavement, it can cause safety hazards such as dragging or damaging the gear or affecting the vehicle's handling.

Fully raising the landing gear also aligns with best practices and regulations for safe driving with a trailer, as it helps to maintain proper weight distribution and vehicle control. Additionally, it ensures that the landing gear does not accidentally lower while in transit, which could create dangerous situations on the road. Therefore, completely raising the landing gear is essential for safe and effective operation of a truck-trailer combination.