004 429 80 44 Relay Valve for Mercedes-Benz Trucks

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 air pressure distribution. It operates through rapid air pressure transfer triggered by a pilot signal, ensuring that braking force is applied effectively and promptly across the pneumatic system.

Vehicle compatibility and fitment

Designed for use in Mercedes-Benz trucks and heavy-duty vehicles, this component ensures consistent performance under demanding conditions. It is engineered with high-strength components to maintain structural integrity during continuous air pressure cycles.

Technical specifications and installation

The unit features specific connection points, including M22x1.5 VOSS ports and an M16x1.5 VOSS port, along with an integrated silencer for controlled exhaust. Maintenance technicians should check the sealing gaskets and port integrity during routine inspections to prevent pressure drops.

Maintenance and operation

For optimal performance, ensure that the maximum operating pressure of 8.5 BAR is not exceeded during system testing. Consult your authorized distributor to verify exact fitment for your specific chassis configuration.

OE cross-reference

303.01.0002 (Relay Valve Relay Valves) is the equivalent of the Mercedes-Benz OE number. This part directly replaces Mercedes-Benz OE number 0044298044.