What is the primary function of a supply pressure gauge in a vehicle?

The primary function of a supply pressure gauge in a vehicle is to tell you how much pressure is in the air tanks. This gauge is crucial for vehicles equipped with air brake systems, as it displays the amount of compressed air available in the air tanks, which is necessary for the operation of the brakes. Maintaining adequate air pressure is vital for safety, as insufficient pressure can lead to brake failure. Therefore, monitoring the supply pressure ensures that the braking system functions correctly and effectively.

Understanding the importance of this gauge is essential for drivers, particularly those operating large trucks or buses, where air brakes are standard. Keeping a close eye on the gauge helps ensure the vehicle remains operable and safe on the road.