003 429 53 44 Relay Valve for Mercedes-Benz Trucks

What does a relay valve do?

This relay valve functions as a critical component within the compressed air brake system, facilitating rapid air pressure transfer triggered by a pilot signal. It is engineered with high-strength components to withstand the rigorous demands of heavy commercial vehicle braking operations, ensuring consistent performance and safety.

Vehicle compatibility

This component is compatible with Mercedes-Benz vehicles. It is specifically designed to integrate into the pneumatic circuitry to manage air flow effectively between the reservoir and the brake chambers.

Installation and maintenance

For proper installation, technicians should verify the port configurations, which include an M22x1.5 port and M16x1.5 ports. Ensure all connections are secure and that the system operates within the maximum pressure limit of 8 BAR to maintain optimal braking response.

Troubleshooting guidance

When inspecting the braking system, checking the relay valve for responsiveness can help diagnose air pressure delays or uneven braking across the vehicle's axles.

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 0034295344.