301.01.0025 Unloader Valves
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301.01.0025 Unloader Valves — WABCO

301.01.0025

Summary

●Port 1: M22x1,5 ●Port 4: M12x1,5 ●Port 21: M22x1,5 ●Port 22: M12x1,5 ●Port 23: M12x1,5 ●Cut-Out Pressure: 8,5 BAR / 0,2 BAR ●Recycle Valve: OK

EAN Code8683457011106
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Description

The technical function of this unloader valve is to regulate air pressure within the pneumatic braking system, ensuring optimal pressure release and stability during heavy-duty operations. Engineered with high-strength components, it provides reliable performance for demanding heavy commercial vehicle environments.

301.01.0025 is the OE-equivalent of the WABCO 975 303 072 0 unloader valve used in SCANIA, VOLVO, DAF, and IVECO heavy commercial vehicles. This part is also compatible with several other systems including CASE (84440618), FAUN (1612011), KENWORTH (S975303072, S9753030720), MACK (6300-9753030720), MAN (81.81011-7110), and MERCEDES BENZ (000 431 18 06).

For workshop technicians performing maintenance or repairs, this component features standardized port sizes including Port 1 (M22x1,5) and Port 4 (M12x1,5) for precise assembly. It is designed to meet specific cut-out pressure requirements of 8,5 BAR / 0,2 BAR to maintain system integrity. Always verify the port configurations and pressure specifications against your specific vehicle requirements before installation to ensure seamless integration with existing brake-suspension hardware.

Technical Specifications

Port 1M22x1,5
Port 4M12x1,5
Port 21M22x1,5
Port 22M12x1,5
Port 23M12x1,5
Cut-Out Pressure8,5 BAR / 0,2 BAR
Inflation Valve-
Recycle ValveOK

Other OEMs

CASE

  • 84440618

DAF

  • 105101
  • 1505479
  • 302239

FAUN

  • 1612011

IVECO

  • 03410537
  • 03410538
  • 03429296

KENWORTH

  • S9753030720

MACK

  • 6300-9753030720

MAN

  • 81.81011-7110
  • 81810117110

MERCEDES BENZ

  • 000 431 18 06
  • A0004311806

MERITOR

  • S 9753030720

PETERBILT

  • S 9753030720

SCANIA

  • 457735
  • 457739

VOLVO

  • WAB9753030720

WABCO

  • 975 303 072 0
  • 9753030720

Related Products

Repair Kits

Vehicles Used

BrandModelEngine
ALEXANDER DENNIS
CASE
DAF
FAUN
IVECO
KENWORTH
MACK
MAN
MERCEDES BENZ
MERITOR
PACCAR
PETERBILT
SCANIA
VOLVO
WABCO

FAQ

What are the compatible OEM numbers for this unloader valve?
This part is compatible with CASE 84440618, DAF 1505479, FAUN 1612011, IVECO 03429296, KENWORTH S975303 own, MACK 6300-975303072 way, MAN 81.81011-711 ⚫ MERCEDES BENZ 0 ⚫ SCANIA 457739 ⚫ VOLVO WAB9753 ⚫ WABCO 975 3 ⚫ PETERBILT S.
Which vehicle brands can use this unloader valve?
It is designed for heavy commercial vehicles from brands such as SCANIA, VOLVO, DAF, IVECO, MAN, MERCEDES BENZ, MACK, and KENWORTH.
What are the specific port sizes for installation?
The unit features Port 1 at M22x1,5 and Port 4 at M12x1,5; Port 21 is M22x1,5 while Ports 22 and 23 are M12x1,5.
What is the cut-out pressure specification?
The operating cut-out pressure for this component is defined as 8,5 BAR / 0,2 BAR.
Is this part suitable for heavy commercial vehicle brake systems?
Yes, it is a high-strength component specifically engineered for the brake systems of heavy trucks and buses.