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303.01.0020 Relay Valve, Brake System

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303.01.0020 Relay Valve — DAF and Renault Trucks compatible

303.01.0020

Summary

This relay valve is designed for heavy commercial vehicle brake systems, specifically compatible with DAF and Renault Trucks. It ensures rapid air pressure redirection to improve braking response times in heavy-duty applications. Equivalent to OE DAF 1360613, Knorr-Bremse AC577A and Renault Trucks 5010525137.

Product identifiers
EAN Code8683457001695
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Compatible OEM Codes

  • KNORR-BREMSE
    • K158595
    • AC 577 A
  • RENAULT TRUCKS
    • 5010525137
  • DAF
    • 1360613

Description

What does a relay valve do?

This relay valve acts as a critical pneumatic control unit within the air brake system of heavy commercial vehicles. By receiving a pilot signal from the brake pedal and directly feeding air from the nearest reservoir to the brake chambers, it significantly reduces air lag caused by long pneumatic lines. This ensures rapid engagement and reliable release speeds during braking operations.

Compatible vehicles and engines

This component is specifically engineered for use in DAF and Renault Trucks. It is also compatible with other heavy-duty vehicle applications where high-performance pneumatic control is required to maintain safety and responsiveness on the road.

Installation and maintenance

For optimal performance, technicians should inspect the mounting on the chassis and ensure all connections are secure. Proper installation prevents air leaks and ensures the valve accurately responds to pilot signals. Regular maintenance of the pneumatic circuit helps maintain the integrity of this essential braking component.

Selection guidance

Consult your authorized distributor to ensure exact fitment for your specific vehicle model.

OE cross-reference

303.01.0020 (Relay Valve Relay Valves) is the equivalent of the DAF, Knorr-Bremse and Renault Trucks OE numbers. This part directly replaces DAF OE number 1360613. It also replaces Knorr-Bremse OE numbers AC577A, K158595 and Renault Trucks OE number 5010525137.

Other OEMs

DAF

  • 1360613

KNORR-BREMSE

  • AC577A
  • K158595
  • AC 577 A

RENAULT TRUCKS

  • 5010525137

Related Products

Repair Kits

Compatible Vehicles

Compatible Vehicles
BrandModelModel TypeEngine
DAF
KNORR-BREMSE
RENAULT TRUCKS

FAQ

What is the function of a relay valve in a truck?
A relay valve receives a pilot signal from the brake pedal to redirect pressurized air from the main reservoir directly to the brake chambers, reducing response lag.
Which vehicle brands are compatible with this part?
This specific part is designed for use in DAF and Renault Trucks heavy commercial vehicles.
What are the symptoms of a failing relay valve?
Common symptoms include delayed braking response, slow release of brakes, or air leaks within the pneumatic braking circuit.
How do I ensure I am selecting the correct relay valve?
It is essential to verify fitment based on your vehicle's specific make, model, and technical requirements through an authorized distributor.
What are the OE reference numbers of this part?
303.01.0020 directly replaces DAF OE number 1360613. It also replaces Knorr-Bremse OE numbers AC577A, K158595 and Renault Trucks OE number 5010525137.