303.05.0027 Compatible Trailer Control Valve

What does a trailer control valve do?

This trailer control valve plays a critical role in the air brake system of heavy commercial vehicles, specifically within the tractor-trailer brake line. It functions by balancing air pressure delivered to the trailer based on brake pedal input, while providing a quick-release exhaust to ensure efficient braking performance. This component is manufactured using high-strength components to withstand demanding operating conditions.

Compatible vehicles and engines

This part is compatible with WABCO systems and is also fitted to MAN, Mercedes-Benz, DAF, Iveco, Kögel, Liebherr, and Steyr vehicles. It serves as a reliable replacement for original equipment in various heavy commercial vehicle configurations, including tractor units and semi-trailer combinations.

Installation and maintenance

For proper installation, technicians should verify that all pneumatic connections are secure. The valve features multiple M16x1,5 ports (including Port 12, Port 22, Port 11, Port 41, Port 42, and Port 43) to facilitate correct integration into the existing air brake line. Regular inspection of sealing gaskets is recommended during routine maintenance intervals.

Troubleshooting guidance

Consult your authorized distributor for technical guidance regarding system interplay and selection.

OE cross-reference

303.05.0027 (Trailer Control Valve) is the equivalent of the DAF, Iveco, Kögel, Liebherr, MAN, Mercedes-Benz, Steyr and WABCO OE numbers. This part directly replaces DAF OE number 1518266. It also replaces Iveco OE numbers 04773981, 04773986, 42033548, 42051712, 42051714, 42065521, 42065522, 42100481, Kögel OE number 322799, Liebherr OE number 502658208, MAN OE numbers 81523016118, 81523016120, 81523016154, 81523016165, 81523016173, Mercedes-Benz OE numbers 0014318705, 0024310105, 0034310205, Steyr OE number 99100360007 and WABCO OE number 9730025390.