301.01.0025 Unloader Valve for Volvo

What does an unloader valve do?

This unloader valve serves as a critical component within the pneumatic brake system, managing air pressure regulation to ensure consistent system performance. By monitoring pressure thresholds, it facilitates the necessary air release to maintain optimal operating conditions for the compressor and braking assembly.

Vehicle compatibility and engine fitment

This component is specifically engineered for Volvo truck series such as the F7, F10, F12, FL10, FL12, N10, N12, NL10, NL12, B10B, B10M, and B12 engines including TD70, TD71, TD100, TD101, TD102, TD103, TD120, TD121, TD122, TD123, D10A, and D12A. It is also fitted to other heavy commercial vehicles from Case, DAF, Faun, Iveco, Kenworth, Mack, MAN, Mercedes-Benz, Peterbilt, and Scania.

Installation and technical specifications

For reliable installation and maintenance, technicians should verify the port sizes: Port 1 is M22x1.5, Port 4 is M12x1.5, Port 21 is M22x1.5, Port 22 is M12x1.5, and Port 23 is M12x1.5. This valve includes a recycle valve function and operates at a cut-out pressure of 8.5 BAR / 0.2 BAR to maintain system integrity.

Maintenance guidance

Regular inspection of the pneumatic lines and port connections is recommended to prevent air leaks and ensure the unloader function remains responsive under heavy-duty load conditions.

OE cross-reference

301.01.0025 (Unloader Valve) is the equivalent of the Case, DAF, Faun, Iveco, Kenworth, Mack, MAN, Mercedes-Benz, Meritor, Peterbilt, Scania, Volvo and WABCO OE numbers. This part directly replaces Case OE number 84440618. It also replaces DAF OE numbers 105101, 1505479, 302239, Faun OE number 1612011, Iveco OE numbers 03410537, 03410538, 03429296, Kenworth OE number S9753030720, Mack OE number 63009753030720, MAN OE number 81810117110, Mercedes-Benz OE number 0004311806, Meritor OE number S9753030720, Peterbilt OE number S9753030720, Scania OE numbers 457735, 457739, Volvo OE number WAB9753030720 and WABCO OE number 9753030720.