What is the normal pressure range for the main reservoir on PA4 and PA5 cars?

The normal pressure range for the main reservoir on PA4 and PA5 cars is indeed 130-150 psi. This range is critical for the safe and efficient operation of the air brake system, which relies on maintaining adequate pressure for effective braking performance. Within this pressure range, the braking system is able to function optimally, ensuring that all components receive the necessary air supply to operate correctly.

Pressure levels above or below this range may indicate potential issues. For instance, if the pressure is too low, it may not activate the brake system effectively, leading to safety risks. Conversely, excessively high pressure could strain components or lead to failures in the brake system. It is essential for operators and maintenance personnel to routinely monitor the main reservoir pressure to ensure that it remains within the specified limits to uphold safety and reliability in operations.