What should you listen for during the air brake system check?

During the air brake system check, it is crucial to listen for any air leaks or unusual sounds. This is important because the integrity of the air brake system is essential for safe vehicle operation. Any hissing or escaping air could indicate a leak, which could lead to a loss of brake pressure and potentially result in brake failure. Additionally, unusual sounds might signify that there is an issue within the components of the braking system, such as air chambers, valves, or lines.

Listening closely during this check allows the driver to identify potential mechanical issues before they escalate into more severe problems that could compromise safety on the road. Therefore, identifying air leaks and unusual sounds is paramount in ensuring the reliability of the air brake system.