How can a bus driver check for leaks in the air brakes?

A bus driver can check for leaks in the air brakes by pressing the brake pedal hard and holding it for one minute. This method is effective because it allows the driver to maintain air pressure in the brake system and observe for any loss of pressure. If the air brake system is functioning correctly, the pressure should remain stable during this test. A noticeable drop in pressure indicates a potential leak in the air system or components that require further inspection.

This approach provides critical information about the integrity of the braking system, which is essential for ensuring safety on the road. Relying solely on a visual inspection or checking brake fluid levels may not reveal hidden issues within the air brake system, such as leaks that could pose significant safety risks while driving.