301.02.0040 Air Dryer Valve for MAN and Liebherr

What does an air dryer valve do?

This air dryer valve is a critical component within the pneumatic brake system of heavy commercial vehicles. It functions by removing moisture, oil droplets, and contaminants from the compressed air stream, which prevents corrosion and freezing in the brake lines. By ensuring a steady supply of dry air, this component helps maintain consistent braking performance and protects sensitive pneumatic components.

Vehicle compatibility and technical specifications

This specific unit is compatible with MAN, Liebherr, and Nissan Ud Truck vehicles. It is also designed to work with WABCO systems. The design features a 24V heater to prevent freezing in cold climates and utilizes M22x1,5 and M12x1,5 port configurations to ensure secure connections within the air processing unit.

Installation and maintenance guidance

For proper installation, technicians should verify that the M22x1,5 and M12x1,5 thread dimensions match the existing lines. It is recommended to inspect the valve during routine brake system service intervals to ensure the purge mechanism remains free of debris. Maintaining this component is essential for preventing pressure loss in the pneumatic system.

Operational requirements

When replacing this part, ensure the vehicle's air pressure requirements align with the 8.1 BAR specification to avoid system malfunctions.

OE cross-reference

301.02.0040 (Air Dryer Valve Air Dryer Valves) is the equivalent of the Liebherr, MAN, Nissan Ud Truck and WABCO OE numbers. This part directly replaces Liebherr OE number 502658308. It also replaces MAN OE numbers 81521026027, 81521026028, 81521026029, 81521026057, 81521026062, 81521026063, 81521026081, Nissan Ud Truck OE number 475409X402 and WABCO OE number 4324102000.