303.01.0002 Relay Valve — WABCO Compatible

This heavy-duty relay valve is engineered to provide precise pneumatic control within the brake system of heavy commercial vehicles. Designed for high-reliability performance, it ensures optimal pressure regulation and responsiveness during critical braking operations. The component is built with high-strength components to withstand demanding duty cycles in the transport sector.

303.01.0002 is the OE-equivalent of the WABCO 973 006 003 0 relay valve used in DAF, MAN, Mercedes-Benz, ProVia, and Scania vehicle systems. This part also maintains compatibility with various MAN models including NEOPLAN and EVOBUS series. It serves as a direct replacement for several critical OEM references such as 1518267, 81.52116-6074, 81.52116-6075, 81.52116-6076, 81.52116-9075, 004 429 63 44, 004 429 80 44, and PRO 011 003 0.

For workshop technicians, this unit features specialized port configurations including M22x1,5 VOSS threads for ports 1 and 2, and an M16x1,5 VOSS thread for port 4. It is essential to verify the maximum operating pressure of 8.5 BAR before installation to ensure system safety. Proper maintenance of the pneumatic lines and checking the integrated silencer functionality during routine service intervals will ensure long-term operational stability.