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ℹ️The air dryer is one of the most critical components in a truck's compressed air system. It is not just a part, but the "guardian angel" of the braking system. Its main job is to remove moisture and contaminants from the compressed air before they reach the valves and air chambers.
▶️Without a functional dryer, condensed water can cause:

1. Brake Freezing: In winter, moisture in the pipes freezes, completely blocking the brakes.
ℹ️If the desiccant becomes saturated, moisture passes freely into the air lines. At low temperatures, this water freezes, blocking the valves and rendering the brakes inoperable.

2. Destruction of internal metal parts (valve failure), tanks, and air chambers.
ℹ️ Oil and particles wear out the seals, leading to costly repairs. Moisture mixes with oil residues from the compressor, creating a "toxic mixture." This in turn causes:
⚙️Swelling of rubber parts: Rubber seals on valves wear out prematurely, causing leaks.
⚙️Corrosion (rust): Internal oxidation of metal components, leading to "stuck" valves.

3. Loss of Performance: Moisture reduces the effectiveness of the braking system, increasing braking distance.

4. Compressor Overload. A clogged dryer forces the compressor to run continuously to maintain pressure, increasing fuel consumption and causing premature wear of the compressor itself.

5. Damage to Other Systems. Many modern trucks use compressed air for:
⚙️Automated Manual Transmissions (AMT): The presence of water can cause gear shifting malfunctions.
⚙️Air suspension: Moisture affects the height control valves, making the suspension unresponsive.
ℹ️As a global leader and original equipment manufacturer (OEM) for most major truck manufacturers, Knorr-Bremse offers state-of-the-art solutions.
- OSC innovation: Knorr-Bremse filters with Oil Separator Cartridge (OSC) filter up to 99% of oil aerosols before the air reaches the desiccant, significantly extending the service life of the system.
- OEM quality: Using genuine Knorr-Bremse replacement parts ensures perfect compatibility and maximum brake performance, even under the most demanding conditions.
ℹ️Tip: Experts recommend checking the dryer every 12 months or depending on vehicle use, always using certified spare parts. Failure to maintain or replace the air dryer filter in a timely manner can lead to serious and costly damage.

- When should you be concerned? If you notice water when emptying the air tanks or if you hear frequent "popping" from the relief valve, your filter is exhausted.