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301.01.0045 Unloader Valve, Brake System
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301.01.0045 Unloader Valve for MAN and Evobus

301.01.0045

Summary

This heavy-duty unloader valve is designed for MAN and Evobus air brake systems. It features M22x1,5 port connections and a precise 7.3 BAR cut-out pressure to ensure reliable pressure regulation in heavy commercial vehicle air systems. Equivalent to OE Evobus 8283804000, MAN 82521016008 and WABCO 9753002110.

Product identifiers
EAN Code8683457011304
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Compatible OEM Codes

  • WABCO
    • 975 300 211 0
  • MAN
    • 82.52101-6008
  • EVOBUS
    • 8283804000

Description

What does an unloader valve do?

This unloader valve plays a critical role in the pneumatic brake system by managing air pressure regulation. It functions by monitoring air pressure within the system and automatically releasing air once the set threshold is reached, ensuring the compressor operates efficiently under heavy-duty conditions.

Vehicle and system compatibility

This component is compatible with MAN and Evobus vehicles. It is specifically engineered to meet the requirements of WABCO systems, providing a reliable solution for maintaining stable pneumatic pressure in heavy commercial vehicle applications.

Installation and maintenance

Installation requires attention to the M22x1,5 port specifications to ensure a secure fitment. Technicians should verify the 7.3 BAR cut-out pressure settings during assembly to maintain optimal system performance and prevent over-pressurization in the air brake circuit.

Troubleshooting and selection

Regular inspection of the valve can help prevent system leaks or compressor cycling issues. For optimal results, check the integrity of all connections and ensure the inflation valve remains fully functional within the pneumatic circuit.

OE cross-reference

301.01.0045 (Unloader Valve) is the equivalent of the Evobus, MAN and WABCO OE numbers. This part directly replaces Evobus OE number 8283804000. It also replaces MAN OE number 82521016008 and WABCO OE number 9753002110.

Technical Specifications

Technical Specifications
Port 1M22x1,5
Port 21M22x1,5
PluggedOK
Cut-Out Pressure7,3 BAR / 0,2 BAR
Inflation ValveOK

Other OEMs

EVOBUS

  • 8283804000

MAN

  • 82521016008
  • 82.52101-6008

WABCO

  • 9753002110
  • 975 300 211 0

Related Products

Repair Kits

Compatible Vehicles

Compatible Vehicles
BrandModelModel TypeEngine
EVOBUS
MAN
WABCO

FAQ

What is the function of this unloader valve?
The valve regulates air pressure by releasing excess air from the system once it reaches the designated cut-out pressure of 7.3 BAR.
Which vehicles are compatible with this part?
This component is designed for use in MAN and Evobus heavy commercial vehicles and is compatible with WABCO systems.
What are the port specifications for this component?
The unit is equipped with M22x1,5 ports to ensure standard fitment within heavy-duty pneumatic brake systems.
How can I know if my unloader valve needs replacement?
Technicians should look for signs of improper pressure regulation or leaks at the ports that indicate a failure in the pressure relief mechanism.
What are the OE reference numbers of this part?
301.01.0045 directly replaces Evobus OE number 8283804000. It also replaces MAN OE number 82521016008 and WABCO OE number 9753002110.