000 429 30 44 Relay Valve for Mercedes-Benz

What does a relay valve do?

This relay valve serves as a critical component within the compressed air brake system of heavy commercial vehicles. It functions by facilitating rapid air pressure transfer triggered by a pilot signal, which ensures precise and responsive braking performance under heavy loads.

Vehicle compatibility and fitment

This component is specifically designed to be compatible with Mercedes-Benz vehicles. It maintains high performance within the pneumatic braking circuit by managing air flow between the main reservoir and the brake chambers, ensuring the vehicle's stopping power remains consistent during operation.

Installation and maintenance

Technical specifications include a M22x1.5 Port 1, a M16x1.5 Port 2, and a M16x1.5 Port 4, with a maximum operating pressure of 8 BAR. For proper maintenance, technicians should inspect all connection points and ensure the ports are free of contaminants to maintain optimal pneumatic efficiency.

System performance and selection

When replacing this part, ensure the mounting location on the chassis is secure and that all seals are correctly seated to prevent air leaks in the braking system.

OE cross-reference

303.01.0005 (Relay Valve Relay Valves) is the equivalent of the Mercedes-Benz OE number. This part directly replaces Mercedes-Benz OE number 0004293044.