What happens if the air pressure in the system drops too low?

When the air pressure in the braking system drops below a certain threshold, the brakes will automatically apply to prevent movement. This safety feature is designed to ensure that a loss of air pressure, which could lead to brake failure or diminished braking capability, does not result in an uncontrolled vehicle. Engaging the brakes when air pressure is low is a critical mechanism that helps maintain safety, especially in larger vehicles that rely on air brakes rather than hydraulic systems.

This automatic application of brakes is essential for preventing potential accidents and ensuring that the vehicle comes to a safe stop. Air-brake systems are engineered to monitor pressure levels and react by engaging the brakes if the air pressure falls dangerously low. Thus, it serves as an effective fail-safe to protect both the driver and other road users.