301.01.0023 Unloader Valves — WABCO Compatible

The 301.01.0023 Unloader Valve is designed to manage pneumatic pressure within the brake system of heavy commercial vehicles, ensuring stable operation during transit. This component plays a vital role in regulating air discharge and maintaining system integrity under high-load conditions. Constructed with heavy-duty grade materials, it provides the necessary durability for demanding workshop environments and long-distance hauling.

301.01.0023 is the OE-equivalent of the WABCO 975 303 061 0 unloader valve used in DAF, IVECO, MAN, and Mercedes Benz systems. This part also maintains compatibility with various heavy-duty vehicle brands including FAUN, IRISBUS, KENWORTH, PETERBILT, and VOLVO, as well as specialized systems from MERITOR and NOOTEBOOM.

For workshop technicians and fleet managers, this unloader valve offers precise fitment with standardized port sizes: Port 1 (M22x1,5), Port 4 (M12x1,5), Port 21 (M22x1,5), and Port 23 (M12x1,5). Regular maintenance and checking of the cut-out pressure—rated at 8,1 BAR / 0,2 BAR—is recommended to ensure optimal pneumatic function and prevent system downtime during service intervals.