With front trailer supports up and the trailer resting on the tractor, what must be checked?

When the front trailer supports are raised and the trailer is resting on the tractor, it is essential to check the clearance between the tires and the trailer nose. This is important to ensure that there is adequate space to prevent any contact between the trailer and the tires during turns and movements. If there is insufficient clearance, it could lead to tire damage or even a potential accident if the tires rub against the trailer. Ensuring proper clearance is a critical safety measure, as it helps maintain the integrity of the vehicle and ensures safe maneuverability on the road.