What is it?
The KME (Kovatch Mobile Equipment) Cummins ISB 6.7 L DEF Head Unit is a mission-critical emissions control module used in fire, rescue, and specialty vehicles built by KME with Cummins ISB 6.7 L engines. It precisely meters Diesel Exhaust Fluid (DEF) into the exhaust stream to neutralize nitrogen oxide (NOx) emissions, while onboard sensors track DEF level, temperature, and pressure to ensure dependable SCR system performance.
Why choose a KME-specific DEF Head Unit?
Engineered to match KME chassis and Cummins ISB 6.7 L powertrain requirements, this DEF Head Unit features factory-level calibration and plug-and-play compatibility with the vehicle’s ECM and wiring. It helps avoid SCR-related fault codes, engine derates, and DEF dosing errors typically seen with off-brand modules. Designed for rugged use in emergency and industrial settings—it's built to be as reliable as the mission.
Key Benefits
✅ OEM-fit designed specifically for KME chassis powered by Cummins ISB 6.7 L engines
✅ Precisely meters DEF for optimal NOx reduction and emissions compliance
✅ Integrated sensors continuously monitor fluid level, temperature, and pressure
✅ Built to resist DEF crystallization, vibration, moisture, and thermal cycling
✅ Minimizes SCR system faults, limp-mode occurrences, and downtime
Applications
Ideal for KME fire apparatus such as pumpers, aerials, command units, and rescue vehicles powered by Cummins ISB 6.7 L engines. This DEF Head Unit ensures consistent emissions control and system compliance during high-demand operating cycles.
Installation Notes
Before servicing, deactivate vehicle power and relieve pressure in the DEF system. Thoroughly clean the DEF tank and lines to clear residue and crystal buildup. Install the head unit using OEM connector interfaces and secure all fluid and electrical fittings. After installation, clear any diagnostic trouble codes and verify DEF dosing accuracy and sensor performance with a diagnostic scan tool.
Final Thoughts
If your KME fire or rescue vehicle experiences DEF system alerts or SCR-related performance issues, this Cummins ISB 6.7 L DEF Head Unit is your OEM-matched solution. Built for precision, durability, and direct integration—it restores DEF system function and keeps your apparatus ready for action. Now available at Tamerx—trusted parts for trusted missions.