303.08.0006.02 WABCO compatible EBS Relay Valve Repair Kit

What does an EBS relay valve repair kit do?

This repair kit is engineered to restore the pneumatic-mechanical performance of EBS relay valves within the braking system. By replacing internal seals and moving elements, this kit helps maintain precise pressure regulation and prevents air leaks in heavy commercial vehicle braking circuits.

Compatible vehicles and engines

The kit is designed for use in heavy commercial vehicle applications, including Kenworth T800, Western Star 4900, Peterbilt 379, Kenworth W900, and Peterbilt 378 models equipped with Caterpillar C10 engines. It is also compatible with systems used in Mercedes-Benz, MAN, Scania, DAF, and PACCAR vehicles.

Installation and maintenance guidance

For optimal performance, technicians should verify that the kit matches the specific valve type and connection dimensions by checking the type plate on the original valve body. Installation should focus on ensuring all seals are seated correctly to maintain the integrity of the 24 V electronic-pneumatic interface. Check the compatibility list.

Troubleshooting and selection

When performing maintenance, ensure that the replacement parts are free from debris and that the valve housing is thoroughly inspected for any internal scoring or damage before assembly.

OE cross-reference

303.08.0006.02 (EBS Relay Valve Repair Kit EBS Relay Valves) is the equivalent of the WABCO OE number. This part directly replaces WABCO OE number 4410430112.