What should you check during the walk-around inspection of the air brake system?

During the walk-around inspection of the air brake system, it's essential to focus on hoses, fittings, and the general condition of the brake components. This is because the functionality and safety of the air brake system heavily depend on these elements.

Inspecting hoses and fittings ensures that there are no leaks or damages, which could lead to air loss and compromised braking performance. Additionally, checking the brake components, such as the slack adjusters, brake chambers, and linings, allows the driver to identify any wear or malfunction that could result in brake failure.

While checking the fluid level in the hydraulic system, the condition of tires and rims, and the engine oil level are important aspects of overall vehicle maintenance, they do not directly pertain to the air brake system itself. Focusing on the specific components of the air brakes during the inspection helps ensure optimal braking power and safety while operating the vehicle.