Heavy-Duty Emissions Reliability: Terex Cummins DEF Head Unit
What is it?
The Terex Cummins DEF Head Unit is a key component in the SCR (Selective Catalytic Reduction) system of Terex vehicles powered by Cummins engines (ISL, ISB, or B6.7 series). It oversees Diesel Exhaust Fluid (DEF) dosing into the exhaust system to reduce NOx emissions, and its sensors provide real-time monitoring of fluid level, temperature, and pressure to keep the system operating smoothly in demanding work conditions.
Why opt for this OEM DEF Head Unit?
Specifically matched to Terex platform and Cummins engine systems, this OEM unit installs directly into factory wiring and ECM setup—no calibration changes needed. It helps avoid DEF metering inconsistencies, SCR fault codes, and engine derates that often accompany aftermarket parts. Proven in construction and industrial settings, it ensures emissions compliance and uptime.
Key Benefits
✅ OEM plug-and-play compatibility with Terex Cummins fleets
✅ Consistent DEF delivery for reliable NOx reductions
✅ Embedded sensors monitor fluid level, temperature, and pressure in real time
✅ Able to tolerate vibration, thermal cycling, DEF crystallization, and moisture
✅ Minimizes SCR diagnostic errors and limits unnecessary downtime
Applications
Ideal for Terex cranes, material handlers, aerial lifts, and heavy machinery equipped with Cummins ISL, ISB, or B6.7 engines. This DEF head unit ensures reliable emissions system performance across long-duty cycles, idle-heavy operations, and high-stress lift schedules.
Installation Notes
Prior to service, disconnect power and relieve DEF system pressure. Clean the DEF reservoir and connector fittings thoroughly to remove residue or crystalline buildup. Mount using OEM connectors and securely fasten all fluid and electrical lines. After installation, clear any active error codes and confirm DEF metering and sensor feedback using a diagnostic scan tool.
Final Thoughts
For Terex equipment powered by Cummins engines, this OEM DEF Head Unit offers dependable emissions system restoration. Designed for durability and system compatibility, it delivers clean operation and fleet readiness—available now from Tamerx.