OM2021 12/01 Safety - Section 2 General Safety Page 2-23 An informational plate (above) for the solenoid valve and relays is mounted to the inside lid of the electrical console behind the operator and passenger seats. A decal (at right) located in the upper right corner of the windshield cautions the operator to limit truck speed when traveling over long distances. Depend- ing on ambient air temperature, if the length of the haul exceeds one hour duration, the truck should be stopped and tires and components allowed to cool for one hour before resuming operation.