What does the yellow zone indicate on the PA5 parking brake reset gauge?

The yellow zone on the PA5 parking brake reset gauge indicates that there is enough air supply to activate the parking brakes or that the parking brakes are not applied. This zone essentially serves as a middle ground, showing that the system is functioning normally in terms of air supply.

In technical terms, the yellow zone acts as a status signal, confirming that the pressure is adequate for the parking brake system to operate correctly. If the gauge is in this zone, it implies that the driver can confidently engage the parking brakes without concern regarding air supply issues. This clarity is particularly important for safety and operational reliability, ensuring that operators know when they can rely on the braking system effectively.

Other zones on the gauge provide different statuses, such as indicating if the parking brakes are applied or if the air supply is insufficient, which is why those interpretations are not accurate in this case. The correct understanding is critical for proper vehicle operation and maintenance practices.