303.01.0001 Relay Valve for Volvo Trucks

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 facilitates the rapid transfer of air pressure triggered by a pilot signal, ensuring responsive and consistent braking performance under demanding conditions. The unit is constructed from high-strength components to withstand high-pressure fluctuations during operation.

Compatible Volvo models and engines

This part is specifically designed for Volvo trucks including the F7, F10, F12, FL10, FL12, N10, N12, NL10, NL12, B10B, B10M, and B12 models. It is also compatible with various other heavy-duty vehicles such as MAN, Scania, DAF, Iveco, and Mercedes-Benz trucks. The valve functions within the pneumatic circuit to manage air distribution between the main reservoir and the brake chambers.

Installation and maintenance

Installation should be performed by a workshop technician to ensure correct mounting on the chassis. When replacing the unit, verify that all M22x1.5 ports are clean and that seals are properly seated to prevent pressure drops. Regular inspection of the pneumatic lines and pilot signal integrity is recommended to maintain optimal braking efficiency.

System troubleshooting

For technicians performing system maintenance, ensure the operating pressure does not exceed the 10 BAR limit specified for this component. Proper selection ensures seamless integration with existing WABCO systems.

OE cross-reference

303.01.0001 (Relay Valve Relay Valves) is the equivalent of the Benalu, DAF, Deutz, Doll, Faun, Fruehauf, Goldhofer, Irisbus, Iveco, Kässbohrer, Kögel, Krone, Liebherr, Lohr, MAN, Mercedes-Benz, Neoplan, Nooteboom, O&K, Otokar, Renault Trucks, Scania, Schmitz Cargobull, Schwarzmuller, Steyr, Terex, Van Hool, Volvo and WABCO OE numbers. This part directly replaces Benalu OE number 605310600. It also replaces DAF OE numbers 1505145, 522545, 522545A, 522545R, Deutz OE number 02077426, Doll OE number 8143317, Faun OE number 99700718485, Fruehauf OE number A2131600, Goldhofer OE number 201248, Irisbus OE number 0300610700, Iveco OE numbers 01278511, 02444906, 04625756, 42015698, 42020573, 61578004, 71005249, Kässbohrer OE number 82834210000, Kögel OE number 77390, Krone OE numbers 500945379, 945379, Liebherr OE numbers 5029280, 502928001, 502928014, Lohr OE number A05020301, MAN OE numbers 81436096008, 81991643679, 90810114360, 90810114390, Mercedes-Benz OE numbers 0004296544, 0014293044, 0034295244, Neoplan OE number 110242100, Nooteboom OE number 307061, O&K OE number 0718485, Otokar OE number AIF0008, Renault Trucks OE numbers 5000012541, 5001829194, 5021170451, Scania OE number 1935623, Schmitz Cargobull OE number 50318, Schwarzmuller OE number 4641, Steyr OE numbers 79000360311, 89000360397, 99014360047, Terex OE number 04720840, Van Hool OE number 637200680, Volvo OE numbers 348909, 384909 and WABCO OE number 9730010100.