303.01.0004 Compatible Relay Valve for Heavy Vehicles

What does a relay valve do?

This relay valve plays a critical role in the pneumatic braking system by ensuring rapid air pressure transfer triggered by a pilot signal. Designed for heavy-duty performance, it helps maintain consistent braking response in high-pressure environments.

Vehicle compatibility

The component is engineered to be compatible with DAF, Iveco, MAN, Renault Trucks, and Scania trucks. It functions effectively within the compressed air brake systems of these heavy commercial vehicles to ensure safety and reliability.

Installation and technical specifications

Technical specifications include a Port 1 of M22x1.5 VOSS and Port 2 and 4 of M16x1.5 VOSS, with a maximum operating pressure of 10 BAR. When performing maintenance or installation on the chassis, technicians should verify all port connections to ensure a secure fitment.

Maintenance guidance

For optimal braking performance, ensure the valve is mounted correctly between the main air reservoir and the brake chambers. Consult your authorized distributor for further assistance.

OE cross-reference

303.01.0004 (Relay Valve Relay Valves) is the equivalent of the DAF, Iveco, MAN, Renault Trucks, Scania and WABCO OE numbers. This part directly replaces DAF OE number 1505412. It also replaces Iveco OE number 08137884, MAN OE numbers 81521166059, 81521166061, 81521166062, 81521166065, 81521169065, 81521169071, Renault Trucks OE number 7701012770, Scania OE number 1935644 and WABCO OE number 9730060000.