303.01.0002 Relay Valve for DAF, MAN, Mercedes-Benz

What does a relay valve do?

This relay valve plays a critical role in the compressed air brake system of heavy commercial vehicles by managing rapid air pressure transfer. It ensures that braking signals are transmitted accurately to the chambers, facilitating reliable stopping power under demanding conditions. The component is engineered from high-strength components to withstand the rigors of heavy-duty service.

Vehicle and engine compatibility

This part is compatible with DAF, MAN, Mercedes-Benz, and Scania vehicles. It is also fitted to other heavy commercial vehicle brands like Volvo, Iveco, and Renault Trucks. The design ensures seamless integration within the pneumatic circuit of tractor units and trucks.

Installation and technical specifications

Technical installation requires attention to the port configurations. This unit features M22x1.5 VOSS ports (Port 1 and Port 2) and an M16x1.5 VOSS port (Port 4), with an integrated silencer for optimized airflow. It is rated for a maximum operating pressure of 8.5 BAR.

Maintenance and performance

To ensure optimal performance, technicians should inspect the air lines and seals during installation. Regular maintenance of the pneumatic system helps prevent air leaks that could affect valve responsiveness.

OE cross-reference

303.01.0002 (Relay Valve Relay Valves) is the equivalent of the DAF, MAN, Mercedes-Benz, Provia, Scania and WABCO OE numbers. This part directly replaces DAF OE number 1518267. It also replaces MAN OE numbers 81521166074, 81521166075, 81521166076, 81521169075, Mercedes-Benz OE numbers 0044296344, 0044298044, Provia OE number PRO0110030, Scania OE number 1935646 and WABCO OE number 9730060030.