What type of maintenance does the air dryer require?

Answer: B — Regular replacement of the desiccant element

The maintenance of an air dryer is crucial for ensuring that the compressed air system in a vehicle operates effectively. Regular replacement of the desiccant element is necessary because this component is responsible for removing moisture from the compressed air. When the desiccant becomes saturated with water, its ability to effectively dry the air diminishes, potentially leading to issues such as corrosion, ice formation, and increased wear on the braking system. By routinely replacing the desiccant element, you help maintain the air dryer’s efficiency, preventing moisture-related problems in the air supply that could affect both the braking system and the vehicle's overall performance. Proper care of the air dryer is essential for safe vehicle operation and longevity of the air brake system.