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308.04.0003 Multi-circuit Protection Valve, Brake System

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308.04.0003 Scania and PACCAR Protection Valve

308.04.0003

Summary

High-strength multi-circuit protection valve designed for heavy commercial vehicle brake systems. This component is compatible with Scania and PACCAR architectures, ensuring reliable pressure distribution across multiple brake circuits in demanding operating conditions. Equivalent to OE PACCAR 1527391, Scania 1774873 and WABCO 9325109582.

Product identifiers
EAN Code8699031084299
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Compatible OEM Codes

  • SCANIA
    • 1928588
    • 1774873
  • WABCO
    • 932 510 958 2
  • PACCAR
    • 1527391

Description

What does a protection valve do?

This multi-circuit protection valve serves a critical role in the pneumatic brake system of heavy commercial vehicles. It is engineered to isolate individual brake circuits, ensuring that a leak in one section does not lead to a total loss of braking capability. By maintaining pressure stability, this component enhances the safety and reliability of the entire braking architecture.

Compatible vehicles and engines

This part is designed for use in Scania and PACCAR trucks. It is also compatible with systems from WABCO, ensuring precise performance within complex pneumatic networks. The design meets high-strength requirements for heavy-duty service environments.

Installation and maintenance

Technicians should inspect these valves during routine brake system maintenance to prevent pressure drops. Proper installation requires ensuring all connections are secure and free of debris to maintain optimal circuit separation. When replacing, always verify that the valve matches the specific circuit count of the vehicle's pneumatic layout.

Troubleshooting and selection

Selecting the correct protection valve is essential for maintaining system integrity. Using components that meet OE tolerances ensures consistent braking response across all active circuits.

OE cross-reference

308.04.0003 (Multi-circuit Protection Valve) is the equivalent of the PACCAR, Scania and WABCO OE numbers. This part directly replaces PACCAR OE number 1527391. It also replaces Scania OE numbers 1774873, 1928588 and WABCO OE number 9325109582.

Other OEMs

PACCAR

  • 1527391

SCANIA

  • 1928588
  • 1774873

WABCO

  • 9325109582
  • 932.510.958.2
  • 932 510 958 2

Related Products

Used In

Compatible Vehicles

Compatible Vehicles
BrandModelModel TypeEngine
PACCAR
SCANIA
WABCO

FAQ

What is the function of a multi-circuit protection valve?
It isolates different brake circuits so that a leak in one circuit does not cause a complete loss of air pressure in the others, maintaining braking safety.
Which vehicle brands are compatible with this part?
This component is designed for Scania and PACCAR heavy commercial vehicles and is compatible with WABCO systems.
When should I replace the protection valve?
Replacement is recommended if leaks are detected at the ports or if there is an inability to maintain stable air pressure across all designated circuits.
How can I ensure I am choosing the correct valve?
Check the compatibility list and verify that the circuit count matches your vehicle's specific pneumatic architecture.
What are the OE reference numbers of this part?
308.04.0003 directly replaces PACCAR OE number 1527391. It also replaces Scania OE numbers 1774873, 1928588 and WABCO OE number 9325109582.