308.04.0003 SCANIA Multi-circuit Protection Valve

The multi-circuit protection valve is a critical component within the pneumatic brake system of heavy commercial vehicles, designed to manage and protect different air circuits. This part ensures that if a leak occurs in one circuit, the other circuits remain functional, maintaining vehicle control and safety. Built with heavy-duty grade materials, the 308.04.0003 provides consistent pressure regulation and long-term durability in demanding environments.

308.04.0003 is the OE-equivalent of the PACCAR 1527391 and SCANIA 1774873 or 1928588 used in various SCANIA truck models such as R410, R440, G450, and K410. It also maintains high compatibility with WABCO 932 510 958 2 systems. This valve is essential for maintaining the integrity of the braking-system air supply across multiple pneumatic loops.

For workshop technicians and fleet managers, this component offers a precise fitment for specialized heavy-duty applications. Proper installation ensures that the air distribution remains stable during high-pressure maneuvers or long-haul transport operations. Regular inspection of the connections and pneumatic lines is recommended to ensure the valve functions correctly within the overall braking architecture.

This product is engineered to handle the rigorous pressure fluctuations typical of heavy commercial vehicle braking systems. By maintaining circuit isolation, it serves as a vital safety layer for operators managing large fleets or single heavy-duty trucks.