When does the Low Air indicator light up?

The Low Air indicator illuminates to alert the driver when air pressure in the braking system drops below a critical threshold, which in this instance is set at 75 psi. This is a vital safety feature in vehicles equipped with air brake systems, as low air pressure can lead to reduced braking effectiveness, increasing the risk of accidents.

Maintaining proper air pressure is essential for the functioning of air brakes, which rely on a specific amount of air pressure to operate effectively. When the air pressure drops below 75 psi, the indicator lights up to prompt the driver to take necessary actions, such as reducing speed and finding a safe location to stop the vehicle to assess and resolve the air pressure issue.

Understanding the proper functioning of vehicle systems, including the indicators for air pressure, is crucial for Army Motor Transport Operators, as it directly impacts the safety and reliability of the vehicle while in operation.