To ensure that a unit will stay in position when parked, take the following precautions:
- Set parking brakes.
- Block the unit by placing chocks or blocks on the rear wheel (front and back of wheel) on one or both sides of the unit or trailer.
- Under no circumstances should a driver use the trailer hand valve, or the tractor protection valve to hold a parked unit.
Updated: August 25, 2022
Published: January 18, 2021