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303.01.0023.02 Relay Valve Repair Kit, Brake System
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303.01.0023.02 Relay Valve Repair Kit for Mercedes-Benz

303.01.0023.02

Summary

This relay valve repair kit is designed for heavy commercial vehicle air brake systems, specifically compatible with Mercedes-Benz vehicles. It provides high-strength components to restore optimal pneumatic performance and prevent air leakage in the braking system. Equivalent to OE Mercedes-Benz 0004200471 and WABCO 9730010052.

Product identifiers
EAN Code8683457003927
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Compatible OEM Codes

  • WABCO
    • 973 001 005 2
  • MERCEDES BENZ
    • 000 420 04 71

Description

What does a relay valve repair kit do?

This relay valve repair kit is essential for maintaining the pneumatic integrity of heavy commercial vehicle braking systems. It serves to overhaul the relay valve, which is responsible for delivering fast and balanced air pressure to the brake chambers, ensuring efficient stopping power.

Vehicle compatibility and systems

The kit is designed to be compatible with Mercedes-Benz vehicles and meets the requirements of WABCO systems. By replacing worn internal components, this kit helps restore the rapid air redirection from the reservoir to the brake chambers, effectively reducing brake response times and ensuring safety.

Installation and maintenance

For workshop technicians, using a high-quality repair kit is a cost-effective alternative to a full valve replacement. When performing maintenance, it is crucial to inspect the pilot air signal and ensure all seals are seated correctly to prevent system delays or pressure drops.

Troubleshooting and selection

Regular inspection of the relay valve components can prevent unexpected brake lag or audible air leaks. Consult your authorized distributor to ensure this kit matches your specific valve requirements.

OE cross-reference

303.01.0023.02 (Relay Valve Repair Kit Relay Valves) is the equivalent of the Mercedes-Benz and WABCO OE numbers. This part directly replaces Mercedes-Benz OE number 0004200471. It also replaces WABCO OE number 9730010052.

Other OEMs

MERCEDES BENZ

  • A0004200471
  • 000 420 04 71

WABCO

  • 9730010052
  • 973.001.005.2
  • 973 001 005 2

Compatible Vehicles

Compatible Vehicles
BrandModelModel TypeEngine
MERCEDES BENZ
WABCO

FAQ

What is the purpose of a relay valve repair kit?
It is used to overhaul the relay valve by replacing internal parts to restore balanced air delivery to the brake chambers and reduce response time.
Which vehicle brands is this kit compatible with?
This specific kit is designed for use in Mercedes-Benz vehicles and is compatible with WABCO systems.
What are the symptoms of a failing relay valve?
Common symptoms include delayed braking response, audible air leaks from the valve, or inconsistent pressure in the braking system.
Is it better to repair or replace the entire relay valve?
A repair kit offers a cost-effective solution for restoring performance without requiring a complete valve replacement, provided the housing is intact.
What are the OE reference numbers of this part?
303.01.0023.02 directly replaces Mercedes-Benz OE number 0004200471. It also replaces WABCO OE number 9730010052.