What is the minimum air pressure required for the rear brakes to function on a fire apparatus?

The minimum air pressure required for the rear brakes to function on a fire apparatus is typically 60 psi. This threshold ensures that the brake system can engage effectively and provide the necessary stopping power, which is crucial for the safety of the vehicle and its operators in emergency situations.

Each component of the braking system requires a specific amount of air pressure to operate correctly. If the air pressure falls below this minimum level, the system may not engage properly, leading to potential brake failure. Fire apparatus often operate under high-demand conditions, necessitating reliable braking performance.

Maintaining air pressure at or above 60 psi is essential for safe operation and compliance with safety standards in firefighting and emergency response. This requirement reflects the need for efficient and responsive braking capabilities when responding to emergencies.