When inspecting brakes, what should be checked for?

When inspecting brakes, it is crucial to check for leaks while the system is pressurized. This is important because a leak in the brake system can result in a loss of hydraulic pressure, which can severely compromise braking efficiency and safety. Pressurizing the system allows an inspector to identify any potential failure points where fluid might escape, which can lead to brake failure if not addressed.

Other factors involved in brake maintenance, while significant, do not directly point to immediate safety risks. For instance, air resistance in brake lines, while it might affect brake performance, is less urgent than identifying leaks. Similarly, checking for wear on brake pads is essential for overall brake effectiveness, but it does not directly address the immediate integrity of the brake system under operational conditions. Lastly, observing a color change in brakes may indicate overheating or other issues but is not a definitive or standard criterion during a brake inspection. Therefore, identifying leaks during a pressurization test is a critical step in ensuring the overall safety and functionality of the braking system.