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303.02.0101 4-circuit protection valve, Brake System

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303.02.0101 Compatible 4-Circuit Protection Valve

303.02.0101

Summary

This pneumatic 4-circuit protection valve features M22x1.5 and M16x1.5 port configurations. Designed for heavy commercial vehicle brake systems, it ensures circuit isolation and pressure distribution for DAF, Leyland, and VDL vehicles. Equivalent to OE DAF 1518192, Leyland ACHE908 and VDL 20240887.

Product identifiers
EAN Code8683457009592
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Compatible OEM Codes

  • VDL
    • 240887
    • 20240887
  • WABCO
    • 934 714 123 0
  • LEYLAND
    • ACHE 908
  • DAF
    • 1518192

Description

What does a 4-circuit protection valve do?

This pneumatic 4-circuit protection valve plays a critical role in the air brake system of heavy commercial vehicles by distributing supply pressure across four independent circuits. It is engineered to isolate any failed circuit, preventing pressure loss from affecting the remaining functional circuits, which is essential for maintaining braking performance during operation.

Vehicle and system compatibility

This component is compatible with DAF, Leyland, and VDL vehicles. It is designed to work seamlessly within WABCO systems to provide reliable pressure regulation and safety for the vehicle's pneumatic braking assembly.

Technical specifications and installation

The valve features specific opening pressures, such as 6.9 BAR for ports 21 and 22, and 7.2 BAR for ports 23 and 24, ensuring precise pneumatic control. Technicians should verify that the M22x1.5 inlet and M16x1.5 outlet ports are correctly seated during installation to prevent air leaks.

Maintenance guidance

Regular inspection of the valve housing and connections is recommended to ensure optimal performance in heavy-duty environments. Consult your authorized distributor.

OE cross-reference

303.02.0101 (4-circuit protection valve) is the equivalent of the DAF, Leyland, VDL and WABCO OE numbers. This part directly replaces DAF OE number 1518192. It also replaces Leyland OE number ACHE908, VDL OE numbers 20240887, 240887 and WABCO OE number 9347141230.

Technical Specifications

Technical Specifications
Port 1M22x1,5
Port 21M16x1,5
Port 22M16x1,5
Port 23M16x1,5
Port 24M16x1,5
Opening Pressure 216,9 BAR
Opening Pressure 226,9 BAR
Opening Pressure 237,2 BAR
Opening Pressure 247,2 BAR
Closing Pressure 215 BAR
Closing Pressure 225 BAR
Closing Pressure 235 BAR
Closing Pressure 245 BAR

Other OEMs

DAF

  • 1518192

LEYLAND

  • ACHE908
  • ACHE 908

VDL

  • 240887
  • 20240887

WABCO

  • 9347141230
  • 934 714 123 0

Compatible Vehicles

Compatible Vehicles
BrandModelModel TypeEngine
DAF
LEYLAND
VDL
WABCO

FAQ

What is the function of a 4-circuit protection valve?
It distributes air pressure to four independent circuits and isolates any circuit experiencing a pressure drop to maintain braking capability in others.
Which vehicle makes are compatible with this component?
This part is compatible with DAF, Leyland, and VDL heavy commercial vehicles.
What are the port sizes for this valve?
The unit features one M22x1.5 port and four M16x1.5 ports (designated as 21, 22, 23, and 24).
How do the opening pressures vary between ports?
Ports 21 and 22 have an opening pressure of 6.9 BAR, while ports 23 and 24 operate at an opening pressure of 7.2 BAR.
What are the OE reference numbers of this part?
303.02.0101 directly replaces DAF OE number 1518192. It also replaces Leyland OE number ACHE908, VDL OE numbers 20240887, 240887 and WABCO OE number 9347141230.