Heavy-Duty DEF Control: Liugong Cummins ISB 6.7L DEF Head Unit
What is it?
The Liugong Construction Machinery Cummins ISB 6.7L DEF Head Unit is an essential emissions control module integrated into the SCR (Selective Catalytic Reduction) system of Liugong earthmoving and construction equipment powered by Cummins ISB 6.7L engines. This unit regulates the precise injection of Diesel Exhaust Fluid (DEF) into the exhaust stream to neutralize nitrogen oxide (NOx) emissions. Onboard sensors continuously monitor DEF fluid level, temperature, and pressure—ensuring accurate dosing and system reliability.
Why choose a Liugong-specific DEF Head Unit?
Custom-engineered for seamless compatibility with Liugong chassis and Cummins ISB engine control systems, this OEM-grade DEF Head Unit offers plug-and-play installation and factory-matched calibration. Unlike generic modules, it eliminates SCR fault codes, dosing inconsistencies, and engine derates. Built to handle rugged construction environments, it provides the durability and emissions precision needed on site.
Key Benefits
✅ Direct-fit design for Liugong equipment using Cummins ISB 6.7L engines
✅ Precisely controls DEF dosing for optimal NOx reduction
✅ Integrated sensors monitor fluid level, temperature, and pressure in real time
✅ Designed to resist DEF crystallization, thermal cycling, and vibration
✅ Helps prevent SCR errors, limp-mode events, and emissions compliance failures
Applications
Ideal for Liugong construction platforms like excavators, wheel loaders, and material handlers equipped with Cummins ISB 6.7L engines. This DEF Head Unit ensures emission control reliability during continuous-duty cycles and harsh field operations where precision dosing is critical.
Installation Notes
Before installation, power down the machine and fully depressurize the DEF system. Thoroughly clean the DEF tank and fluid lines to remove any residue or crystallized deposits. Install the new unit using OEM-compatible connectors, ensuring all fluid and electrical fittings are securely seated. After installation, clear diagnostic codes and verify DEF dosing and sensor functionality using a diagnostic scan tool.
Final Thoughts
If your Liugong equipment outfitted with a Cummins ISB 6.7L engine is showing DEF system alerts, SCR-related derates, or dosing inconsistencies, this OEM-aligned DEF Head Unit offers a reliable fix. Precisely calibrated for your application and built for demanding work environments, it restores emissions compliance and system integrity. Now in stock and ready to ship from Tamerx—trusted parts for construction reliability.