303.01.0046 Relay Valve compatible with Volvo and Scania

What does a relay valve do?

A relay valve is used in the compressed air brake systems of heavy-duty vehicles, including trucks, semi-trucks, tractor units, and buses. This component is essential for ensuring the rapid and accurate transfer of air pressure triggered by a pilot signal to the brake chambers.

Vehicle and engine compatibility

This specific unit is compatible with Volvo models such as FH12, FH13, FM series, and VNL, as well as Renault Trucks Kerax and Magnum series. It is also fitted to Mack Granite and Pinnacle trucks with MP7 or MP8 engines. Additionally, it serves various heavy-duty applications across Mercedes-Benz, Scania, DAF, and Hino vehicles.

Installation and maintenance

To ensure correct installation, technicians should verify the mounting location on the chassis between the main air reservoir and the brake chambers. Proper maintenance of the pneumatic lines and checking for air leaks during installation is recommended to maintain optimal braking response.

Service guidance

The component is manufactured using high-strength components to withstand heavy-duty service environments. Consult your authorized distributor to verify compatibility with your specific vehicle configuration.

OE cross-reference

303.01.0046 (Relay Valve Relay Valves) is the equivalent of the DAF, Hino, Kässbohrer, Mercedes-Benz, Nissan Ud Truck, Renault Trucks, Scania, VDL, Volvo and WABCO OE numbers. This part directly replaces DAF OE numbers 1305026, 1305026A, 1305026R, 1525397. It also replaces Hino OE number 44080E0130, Kässbohrer OE number 21151102180, Mercedes-Benz OE numbers 0044296244, 0044297844, Nissan Ud Truck OE number 5222405172, Renault Trucks OE number 5010588146, Scania OE number 2090238, VDL OE numbers 20235259, 759010017, Volvo OE number 20590781 and WABCO OE number 9730110040.