301.01.0015 Unloader Valves — IVECO

The heavy-duty Unloader Valve is a critical component within the pneumatic brake system of heavy commercial vehicles, ensuring precise pressure regulation and system stability. Designed to handle demanding operational environments, this part provides consistent performance for essential pneumatic functions, including inflation and recycling processes.

This specific model is an OE-equivalent for the DEUTZ 4398756 and WABCO 975 303 441 0 unloader valves used in various heavy-duty applications including DEUTZ, IVECO, LIEBHERR, and WABCO systems. It is engineered to meet the strict requirements of vehicle manufacturers such as IVECO (covering codes 42007712, 42021855, 42085761, 42008234, 42009103, 42021855, 4831983, 4842612), FREIGHTLINER, KENWORTH, and PETERBILT.

For workshop technicians performing maintenance or assembly, this valve features a standardized Port 1 (M22x1,5) and Port 21 (M22x1,5) configuration. The technical specifications include a cut-out pressure of 7,8 BAR / 0,2 BAR and includes an integrated inflation valve and recycle valve functionality. It is essential to verify port compatibility and pressure settings during installation to ensure optimal brake system performance.

Maintenance professionals should monitor the valve's performance during routine service intervals to prevent any pneumatic irregularities in the braking circuit. This component's robust design is optimized for long-term reliability in heavy-duty truck and bus architectures.