303.05.0013 Trailer Control Valve — Volvo Equivalent

What does a trailer control valve do?

This trailer control valve plays a critical role in the air brake system of heavy commercial vehicles, ensuring balanced air pressure delivery between the tractor unit and the trailer. Built with high-strength components, it manages pneumatic flow to maintain consistent braking performance during heavy-duty operation.

Compatible vehicles and engines

The component is specifically designed for compatibility with various Volvo models including the B12, F10, F12, F7, FL10, FL12, N10, N12, NL10, NL12, B10B, and B10M engines such as TD120 and D12A. It is also fitted to Ford Trucks, Iveco, Mercedes-Benz, and Scania trucks. This part functions effectively within pneumatic systems compatible with WABCO systems.

Installation and maintenance

Installation requires careful attention to the M22x1,5 port connections (Ports 1, 2, 41, 42, and 43) to ensure airtight seals. Technicians should inspect all pneumatic lines for debris and ensure the valve is seated correctly to prevent pressure drops in the tractor-trailer brake line.

Troubleshooting and selection

Regular maintenance checks of the air brake system can prevent premature wear of internal seals. If braking response feels inconsistent or if there is an audible air leak from the valve body, a replacement should be evaluated to maintain fleet safety.

OE cross-reference

303.05.0013 (Trailer Control Valve) is the equivalent of the Ford Trucks, Iveco, Mercedes-Benz, Scania, Volvo and WABCO OE numbers. This part directly replaces Ford Trucks OE numbers 72DB2K318BA, 73NB2K318BA, 74DB2K318AB, 74HB2K318AA, 74HB2K318BA, 74HB2K318BB, 82DB2K318AA, 82DB2K318BA. It also replaces Iveco OE number 04760466, Mercedes-Benz OE number 0014312505, Scania OE number 1935628, Volvo OE number 363154 and WABCO OE number 9730020100.