What should be observed for leaks in the brake system?

Observing for no visible or audible leaks in the brake system is crucial for ensuring the safety and functionality of the braking mechanism in commercial vehicles. Visible leaks can indicate fluid loss from the brake lines, which is critical because hydraulic systems rely on maintaining pressure to function effectively. If there's a leak, the brake system may not perform as intended, leading to reduced braking power or even complete brake failure.

Audible leaks, often characteristic sounds such as hissing or bubbling, can similarly suggest that air is entering the system or that brake fluid is leaking, both of which can compromise the integrity of the brake system. Ensuring that there are no noticeable leaks allows the operator or inspector to verify that the brakes are functioning correctly and are safe for use.

While checking for damaged hoses and cables, temperature in the brake system, and examining specific components like the push rod may provide additional insights into the condition of the brake system, the primary and immediate concern about safety and operation directly relates to the presence of leaks. Therefore, the emphasis on ensuring there are no visible or audible leaks is a fundamental aspect of brake system inspections.