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301.01.0015 Unloader Valve, Brake System
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301.01.0015 Unloader Valve compatible with Iveco

301.01.0015

Summary

This high-strength unloader valve is designed for heavy commercial vehicle brake systems. It features M22x1.5 ports and a precise 7.8 BAR cut-out pressure, ensuring reliable air pressure regulation for Iveco and Liebherr applications. Equivalent to OE Deutz 4398756, Iveco 04784766 and Liebherr 5026264.

Product identifiers
EAN Code8683457011007
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Compatible OEM Codes

  • IVECO
    • 42085761
    • 42021855
    • 42009103
    • 42008234
    • 42007712
    • 04842612
    • 04831983
    • 04804764
    • 04784766
  • LIEBHERR
    • 5029655
    • 5026264
  • WABCO
    • 975 303 441 0
  • DEUTZ
    • 4398756

Description

What does an unloader valve do?

This unloader valve plays a critical role in the pneumatic brake system by regulating air pressure levels within the circuit. By monitoring pressure thresholds, it ensures that the compressor system operates efficiently without over-pressurizing the lines, which protects sensitive pneumatic components from excessive stress.

Vehicle compatibility and fitment

This part is compatible with Iveco and Liebherr vehicles. It serves as a reliable replacement for components used in heavy commercial vehicle applications, maintaining the integrity of the air brake system under demanding operating conditions.

Installation and technical specifications

The unit is designed with M22x1.5 ports and includes a fitted plug for secure installation. Technicians should verify the 7.8 BAR cut-out pressure setting during assembly to ensure proper system synchronization and optimal performance of the air release cycle.

Maintenance and troubleshooting

Proper maintenance of the unloader valve prevents air leaks and ensures consistent braking performance. Regular inspections of the port connections and valve seating are recommended to prevent system pressure fluctuations.

OE cross-reference

301.01.0015 (Unloader Valve) is the equivalent of the Deutz, Iveco, Liebherr and WABCO OE numbers. This part directly replaces Deutz OE number 4398756. It also replaces Iveco OE numbers 04784766, 04804764, 04831983, 04842612, 42007712, 42008234, 42009103, 42021855, 42085761, Liebherr OE numbers 5026264, 5029655 and WABCO OE number 9753034410.

Technical Specifications

Technical Specifications
Port 1M22x1,5
Port 4-
Port 21M22x1,5
Port 23-
PluggedOK
Cut-Out Pressure7,8 BAR / 0,2 BAR
Inflation ValveOK
Recycle ValveOK
Port 22FITTING/KÖR TAPA

Other OEMs

DEUTZ

  • 4398756

IVECO

  • 42085761
  • 42021855
  • 42009103
  • 42008234
  • 42007712
  • 04842612
  • 04831983
  • 04804764
  • 04784766

LIEBHERR

  • 5029655
  • 5026264

WABCO

  • 9753034410
  • 975 303 441 0

Related Products

Repair Kits

Compatible Vehicles

Compatible Vehicles
BrandModelModel TypeEngine
DEUTZ
IVECO
LIEBHERR
WABCO

FAQ

What is the function of this unloader valve?
It regulates air pressure within the brake system, automatically releasing air once the set threshold of 7.8 BAR is reached to prevent over-pressurization.
Which vehicle brands is this part compatible with?
This component is designed for use in Iveco and Liebherr heavy commercial vehicles, ensuring precise fitment within their pneumatic systems.
What are the technical port specifications?
The valve features M22x1.5 ports (Port 1 and Port 21) to ensure secure connections within the vehicle's air brake assembly.
How can I identify if my unloader valve needs replacement?
Technicians should look for symptoms of improper pressure regulation, such as continuous compressor running or inconsistent air pressure levels in the brake circuit.
What are the OE reference numbers of this part?
301.01.0015 directly replaces Deutz OE number 4398756. It also replaces Iveco OE numbers 04784766, 04804764, 04831983, 04842612, 42007712, 42008234, 42009103, 42021855, 42085761, Liebherr OE numbers 5026264, 5029655 and WABCO OE number 9753034410.