301.03.0047 Air Dryer Valve for Volvo

What does an air dryer valve do?

This air dryer valve plays a critical role in the pneumatic braking system by managing moisture and contaminants to ensure reliable air supply. Built with high-strength components, it helps protect the entire air brake circuit from corrosion and debris buildup. This component is essential for maintaining optimal pressure levels within the vehicle's pneumatic system.

Compatible vehicles and engines

The valve is designed for compatibility with various Volvo models, including the FH series (D12A, D12C, D12D, D16C engines), FM series (D10A, D12C, D12D engines), and FL series (TD102, TD103, D10A, TD122, TD123 engines). It is also suitable for Volvo VHD, VNL, B10B, B10M, B12, and NL series trucks, as well as Renault Trucks Magnum with DXi12 engines. Additionally, it is fitted to Volvo F10 and F12 models.

Installation and maintenance

For proper installation, technicians should verify that the port sizes—including the M22x1.5 and M12x1.5 threads—match the existing system requirements. The integrated 24 V heater ensures consistent operation under varying temperatures. Regular inspection of the valve assembly is recommended to prevent air system contamination.

Selection guidance

Consult your authorized distributor to ensure correct fitment for your specific engine configuration.

OE cross-reference

301.03.0047 (Air Dryer Valve Air Dryer Valves) is the equivalent of the Knorr-Bremse and Volvo OE numbers. This part directly replaces Knorr-Bremse OE numbers II36256000, II39751F00, II39751F000, II39751F00AT, II39751F05T, II39751FAT, II39751FAT000, II39751FN50, LA8271. It also replaces Volvo OE number 20409513.