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301.01.0028 Unloader Valve, Brake System
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301.01.0028 Mercedes-Benz Compatible Unloader Valve

301.01.0028

Summary

This heavy-duty unloader valve is engineered for Mercedes-Benz brake systems. It features specific port configurations including M22x1,5 and M12x1,5 and operates with a 9,5 BAR / 0,2 BAR cut-out pressure to ensure precise pneumatic control in heavy commercial vehicles. Equivalent to OE Mercedes-Benz 0024319806 and WABCO 9753030880.

Product identifiers
EAN Code8683457011137
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Compatible OEM Codes

  • WABCO
    • 975 303 088 0
  • MERCEDES BENZ
    • 002 431 98 06

Description

What does an unloader valve do?

This unloader valve plays a critical role in the pneumatic brake system of heavy commercial vehicles by regulating air pressure levels. It ensures that the compressor maintains stable pressure by automatically releasing air once the set threshold is reached, protecting the system from overpressure conditions.

Vehicle compatibility and application

This component is compatible with Mercedes-Benz trucks and is designed to function effectively within high-pressure air brake systems. It serves as a reliable replacement for original equipment in various heavy-duty applications, ensuring consistent pressure regulation for the vehicle's braking and pneumatic components.

Installation and maintenance

Installation requires careful attention to the port sizes, specifically the M22x1,5 and M12x1,5 connections. Technicians should verify that all seals are properly seated to prevent leaks and ensure the 9,5 BAR cut-out pressure functions correctly during routine system checks.

System reliability and troubleshooting

Regular inspection of the valve helps prevent unexpected pressure drops or compressor cycling issues. Maintaining these components ensures the long-term reliability of the entire air brake system in heavy commercial vehicles.

OE cross-reference

301.01.0028 (Unloader Valve) is the equivalent of the Mercedes-Benz and WABCO OE numbers. This part directly replaces Mercedes-Benz OE number 0024319806. It also replaces WABCO OE number 9753030880.

Technical Specifications

Technical Specifications
Port 1M22x1,5
Port 4M12x1,5
Port 21M22x1,5
Port 22M12x1,5
Port 23M12x1,5
Cut-Out Pressure9,5 BAR / 0,2 BAR
Inflation Valve-
Recycle Valve-

Other OEMs

MERCEDES BENZ

  • A0024319806
  • 002 431 98 06

WABCO

  • 9753030880
  • 975 303 088 0

Related Products

Repair Kits

Compatible Vehicles

Compatible Vehicles
BrandModelModel TypeEngine
MERCEDES BENZ
WABCO

FAQ

What is the primary function of this unloader valve?
The valve regulates air pressure within the brake system by releasing air at a specific cut-out pressure to prevent overpressure.
Which vehicle brands is this part compatible with?
This component is designed to be compatible with Mercedes-Benz vehicles and WABCO systems.
What are the technical port specifications?
The unit features M22x1,5 ports (Port 1 and Port 21) and M12x1,5 ports (Port 4, Port 22, and Port 23).
What is the operating cut-out pressure?
The specified cut-out pressure for this component is 9,5 BAR / 0,2 BAR.
What are the OE reference numbers of this part?
301.01.0028 directly replaces Mercedes-Benz OE number 0024319806. It also replaces WABCO OE number 9753030880.