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301.01.0003 Unloader Valve for Volvo Trucks

301.01.0003

Summary

This high-strength unloader valve is designed for heavy commercial vehicle air brake systems. It features M22x1.5 port sizes and a cut-out pressure of 8,1 BAR / 0,2 BAR, ensuring reliable pressure regulation for Volvo F-series, FL-series, and N-series trucks. Equivalent to OE DAF 1505157, Evobus 8283657000 and Faun 99708458256.

Product identifiers
EAN Code8699031064376
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Compatible OEM Codes

  • MERCEDES BENZ
    • 002 431 83 06
    • 002 431 49 06
    • 002 431 43 06
    • 001 431 98 06
    • 001 431 34 06
    • 001 431 12 06
    • 001 431 06 06
    • 001 431 00 06
  • MAN
    • 81.52101-9083
    • 81.52101-6132
    • 81.52101-6123
    • 81.52101-6114
    • 81.52101-6112
    • 81.52101-6085
    • 81.52101-6076
  • IVECO
    • 42085762
    • 02808514
    • 02521211
    • 02516973
    • 02516923
    • 02516892
  • IKARBUS
    • 1612050
    • 1612049
    • 1612037
    • 1612026
  • STEYR
    • 99100360002
    • 79100360070
    • 79100360002
  • RENAULT TRUCKS
    • 5000464197
    • 5000243947
  • NEOPLAN
    • 1102733544138
    • 1102435544308
  • WABCO
    • 975 300 110 0
  • VOLVO
    • 6789355
  • LEYLAND
    • BBU5210
  • GOLDHOFER
    • 152077
  • FAUN
    • 99708458256
  • EVOBUS
    • 8283657000
  • DAF
    • 1505157

Description

This unloader valve plays a critical role in the pneumatic brake system by regulating air pressure within the system. It ensures that the compressor stops delivering air once the required pressure threshold is reached, preventing over-pressurization. Constructed from heavy-duty grade materials, this component is engineered to withstand the rigorous operating conditions of heavy commercial vehicles.

This component is specifically fitted to Volvo models including the F10, F12, F7, FL10, FL12, N10, N12, NL10, NL12, B10B, B10M, and B12. It is also compatible with various engines such as the TD100, TD120, TD70, D10A, and D12A. Additionally, it is used in vehicles from MAN, Mercedes-Benz, DAF, Iveco, and Renault Trucks.

Maintenance of the pneumatic system requires regular inspection of all air lines and valves to prevent leaks. Technicians should verify that the cut-out pressure remains within the specified 8,1 BAR range during routine service to ensure optimal braking performance. When replacing this unit, ensure the M22x1.5 ports are clean and properly seated to maintain system integrity.

Consult your authorized distributor.

OE cross-reference

301.01.0003 (Unloader Valve) is the equivalent of the DAF, Evobus, Faun, Goldhofer, Ikarbus, Iveco, Leyland, MAN, Mercedes-Benz, Neoplan, Renault Trucks, Steyr, Volvo and WABCO OE numbers. This part directly replaces DAF OE number 1505157. It also replaces Evobus OE number 8283657000, Faun OE number 99708458256, Goldhofer OE number 152077, Ikarbus OE numbers 1612026, 1612037, 1612049, 1612050, Iveco OE numbers 02516892, 02516923, 02516973, 02521211, 02808514, 42085762, Leyland OE number BBU5210, MAN OE numbers 81521016076, 81521016085, 81521016112, 81521016114, 81521016123, 81521016132, 81521019083, Mercedes-Benz OE numbers 0014310006, 0014310606, 0014311206, 0014313406, 0014319806, 0024314306, 0024314906, 0024318306, Neoplan OE numbers 1102435544308, 1102733544138, Renault Trucks OE numbers 5000243947, 5000464197, Steyr OE numbers 79100360002, 79100360070, 99100360002, Volvo OE number 6789355 and WABCO OE number 9753001100.

Technical Specifications

Technical Specifications
Port 1M22x1,5
Port 4-
Port 21M22x1,5
Cut-Out Pressure8,1 BAR / 0,2 BAR
Inflation ValveOK

Other OEMs

DAF

  • 1505157

EVOBUS

  • 8283657000

FAUN

  • 99708458256

GOLDHOFER

  • 152077

IKARBUS

  • 1612050
  • 1612049
  • 1612037
  • 1612026

IVECO

  • 42085762
  • 02808514
  • 02521211
  • 02516973
  • 02516923
  • 02516892

LEYLAND

  • BBU5210

MAN

  • 81521019083
  • 81521016132
  • 81521016123
  • 81521016114
  • 81521016112
  • 81521016085
  • 81521016076
  • 81.52101-9083
  • 81.52101-6132
  • 81.52101-6123
  • 81.52101-6114
  • 81.52101-6112
  • 81.52101-6085
  • 81.52101-6076

MERCEDES BENZ

  • A0024318306
  • A0024314906
  • A0024314306
  • A0014319806
  • A0014313406
  • A0014311206
  • A0014310606
  • A0014310006
  • 002 431 83 06
  • 002 431 49 06
  • 002 431 43 06
  • 001 431 98 06
  • 001 431 34 06
  • 001 431 12 06
  • 001 431 06 06
  • 001 431 00 06

NEOPLAN

  • 1102733544138
  • 1102435544308

RENAULT TRUCKS

  • 5000464197
  • 5000243947

STEYR

  • 99100360002
  • 79100360070
  • 79100360002

VOLVO

  • 6789355

WABCO

  • 9753001100
  • 975 300 110 0

Related Products

Compatible Vehicles

Compatible Vehicles
BrandModelModel TypeEngine
DAF
EVOBUS
FAUN
GOLDHOFER
IKARBUS
IVECO
LEYLAND
MAN
MERCEDES BENZ
NEOPLAN
RENAULT TRUCKS
STEYR
VOLVO
VOLVO B10B D10A
VOLVO B10M D10A
VOLVO B10M TD100
VOLVO B12 D12A
VOLVO B12 TD120
VOLVO F10 TD100
VOLVO F10 TD101
VOLVO F10 TD102
VOLVO F12 TD120
VOLVO F12 TD121
VOLVO F12 TD122
VOLVO F7 TD70
VOLVO F7 TD71
VOLVO FL10 D10A
VOLVO FL10 TD102
VOLVO FL10 TD103
VOLVO FL12 TD122
VOLVO FL12 TD123
VOLVO N10 TD100
VOLVO N10 TD101
VOLVO N12 TD120
VOLVO N12 TD122
VOLVO NL10 D10A
VOLVO NL12 D12A
WABCO

FAQ

What is the function of this unloader valve?
The unloader valve regulates air pressure within the braking system by releasing air when the target cut-out pressure is reached.
Which vehicle makes are compatible with this part?
This part is primarily designed for Volvo trucks and is also compatible with systems from MAN, DAF, Iveco, and Mercedes-Benz.
What are the technical port specifications?
This component features M22x1.5 port sizes for Port 1 and Port 21 to ensure precise fitment in heavy commercial air systems.
How do I know if my unloader valve needs replacement?
Technicians should look for symptoms like continuous compressor running or inconsistent air pressure levels in the pneumatic system.
What are the OE reference numbers of this part?
301.01.0003 directly replaces DAF OE number 1505157. It also replaces Evobus OE number 8283657000, Faun OE number 99708458256, Goldhofer OE number 152077, Ikarbus OE numbers 1612026, 1612037, 1612049, 1612050, Iveco OE numbers 02516892, 02516923, 02516973, 02521211, 02808514, 42085762, Leyland OE number BBU5210, MAN OE numbers 81521016076, 81521016085, 81521016112, 81521016114, 81521016123, 81521016132, 81521019083, Mercedes-Benz OE numbers 0014310006, 0014310606, 0014311206, 0014313406, 0014319806, 0024314306, 0024314906, 0024318306, Neoplan OE numbers 1102435544308, 1102733544138, Renault Trucks OE numbers 5000243947, 5000464197, Steyr OE numbers 79100360002, 79100360070, 99100360002, Volvo OE number 6789355 and WABCO OE number 9753001100.