What is the function of wear indicators in brake systems?

Wear indicators in brake systems serve the important function of providing visual checks on the wear condition of the brake components, particularly the brake pads or shoes. This function is critical because it ensures that the operator can easily see when the brake components are nearing the end of their service life, so they can be replaced before they reach a point where they could fail, affecting performance and safety.

By having wear indicators, maintenance personnel can quickly assess if the brakes require attention without needing to disassemble the brake system, which can save time and improve operational efficiency. This proactive approach helps in maintaining optimal braking performance and extends the life of the entire braking system, ensuring that vehicles operate safely.

While there are other aspects to brake systems mentioned in the other choices, they do not directly pertain to the specific role that wear indicators play in monitoring brake wear.