Where should the low air warning light and buzzer activate?

The activation of the low air warning light and buzzer is designed to alert the driver/operator about the pressure condition in the airbrake system. It serves a critical safety function by warning the operator to take action before the pressure drops to a level that could compromise braking ability.

In this case, the low air warning system is set to activate between 55 and 75 psi. This pressure range is crucial because it allows the operator to respond before the pressure falls below a critical threshold, ensuring that there is still some air pressure available for braking. Activating the warning light and buzzer in this range gives the operator time to safely stop the vehicle and take corrective actions, such as checking for leaks, rather than waiting until the pressure drops too low, which could lead to brake failure or other safety issues.

Knowing this operational parameter helps operators maintain better control and safety when driving the vehicle, especially in emergency situations. The proper function of the warning system is vital for effective fleet management and accident prevention in firefighting operations.