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303.01.0033 Relay Valve, Brake System
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303.01.0033 DAF and Iveco Relay Valve

303.01.0033

Summary

This heavy-duty relay valve is designed for compressed air brake systems in DAF and Iveco trucks. It features M22x1,5 port sizes and is rated for a maximum operating pressure of 8 bar, ensuring reliable pneumatic signal transfer. Equivalent to OE DAF 1519316, Iveco 4691977 and WABCO 9730010320.

Product identifiers
EAN Code8683457009158
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Compatible OEM Codes

  • WABCO
    • 973 001 032 0
  • IVECO
    • 4691977
  • DAF
    • 1519316

Description

What does a relay valve do?

This relay valve plays a critical role in the pneumatic brake system of heavy commercial vehicles by facilitating rapid air pressure transfer. By responding to pilot signals, it ensures that braking force is applied efficiently across the vehicle's air brake circuit. The component is constructed from high-strength components to withstand the demanding conditions of heavy-duty service.

Vehicle compatibility

This part is compatible with DAF and Iveco trucks. It serves as a reliable replacement for components used in various heavy-duty vehicle configurations, including tractor units and buses. The valve maintains system integrity through precise pressure regulation.

Installation and maintenance

For proper installation, technicians should verify the port connections, as this unit utilizes M22x1,5 threading on ports 1, 2, and 4. Ensure all connections are secure to maintain a maximum operating pressure of 8 bar. Regular inspection of the mounting location on the chassis is recommended to prevent leaks.

Selection guidance

Consult your authorized distributor to ensure correct fitment for your specific vehicle application.

OE cross-reference

303.01.0033 (Relay Valve Relay Valves) is the equivalent of the DAF, Iveco and WABCO OE numbers. This part directly replaces DAF OE number 1519316. It also replaces Iveco OE number 4691977 and WABCO OE number 9730010320.

Technical Specifications

Technical Specifications
Port 1M22x1,5
Port 2M22x1,5
Port 4M22x1,5
PressureMAX 8 BAR

Other OEMs

DAF

  • 1519316

IVECO

  • 4691977

WABCO

  • 9730010320
  • 973 001 032 0

Compatible Vehicles

Compatible Vehicles
BrandModelModel TypeEngine
DAF
IVECO
WABCO

FAQ

What is the primary function of this relay valve?
It facilitates rapid air pressure transfer within the compressed air brake system when triggered by a pilot signal.
Which vehicle brands is this part compatible with?
This component is compatible with DAF and Iveco heavy commercial vehicles.
What are the technical port specifications?
The unit features M22x1,5 thread sizes on Port 1, Port 2, and Port 4.
What is the maximum operating pressure?
The maximum operating pressure for this relay valve is 8 bar.
What are the OE reference numbers of this part?
303.01.0033 directly replaces DAF OE number 1519316. It also replaces Iveco OE number 4691977 and WABCO OE number 9730010320.