How to Identify an Air Dryer Filter Failure and Why It Is Important

The braking systems, suspensions, and other auxiliary equipment of modern trucks and buses operate on compressed air. for this system to function efficiently and safely, the air must be clean and absolutely "dry." This is where air dryer (desiccant) filters come into play. These filters, which trap moisture, oil, and other contaminants from the compressed air produced by the compressor and send pure air to the system, are like the lungs of your braking system. So, how can you tell if this vital part is failing, and why is it so important?

One of the most common signs of an air dryer filter failure is more water than usual coming from the brake system air tanks. When you open the drain valves at the bottom of the air tanks, you should only get a spray of air; if you notice water droplets or a significant moisture discharge, it is a strong indication that the dryer filter is not doing its job. Another symptom is oil leaks on or around the filter. This indicates that oil from the compressor is not being trapped by the filter and is entering the system.

Furthermore, issues such as weakened braking performance, delayed brake response, or the freezing of valves in the brake system during winter can also indirectly point to an air dryer failure. This is because moisture entering the system can freeze in cold weather, preventing the valves from operating and compromising overall system safety.

So, why is this failure so important? Because moist air causes internal rust and corrosion on the metal parts of the braking system (valves, tanks, pipes). These rust particles can circulate within the system, clog sensitive valves, and lead to brake failure or lock-up. This not only means thousands in repair costs but also poses a serious safety risk to everyone on the road.

Do not neglect the maintenance of your air dryer filter to avoid compromising your safety and your vehicle's health. Be sure to replace your filter when you notice the symptoms or at the intervals recommended by the manufacturer. At this point, it is critical to choose a product that is fully compatible with your system and has a high moisture-holding capacity. Core Filter extends the life of your braking system with its air dryer filters that offer maximum moisture separation performance even under the most demanding conditions, and most importantly, it guarantees the safety of you and the cargo you carry. Always start your journey on a dry and safe foot with Core Filter.