Emergency-Grade Emissions Control: REV Group Cummins ISL DEF Head Unit
What is it?
The REV Group Cummins ISL DEF Head Unit plays a central role in the SCR (Selective Catalytic Reduction) system for emergency and specialty vehicles built on REV Group chassis and powered by Cummins ISL engines. It ensures accurate Diesel Exhaust Fluid (DEF) delivery into the exhaust stream to reduce NOx emissions. Integrated sensors track fluid level, temperature, and pressure to maintain system reliability during high-demand operation.
Why choose this OEM DEF Head Unit?
Matched to REV Group chassis and Cummins ISL powertrains, this OEM flood-resistant module connects directly to factory ECM wiring with no adaptation needed. It combats DEF metering deviations, SCR error codes, and engine derates common with aftermarket parts. Proven in rugged response environments, it supports emissions compliance and vehicle readiness when it matters most.
Key Benefits
✅ OEM drop-in fit for REV Group using Cummins ISL engines
✅ Smooth DEF dosing to support EPA NOx reduction goals
✅ Sensor-monitored fluid level, temperature, and pressure in real time
✅ Resilient to vibration, thermal cycles, corrosion, and DEF crystallization
✅ Minimizes risk of SCR faults, limp-mode events, and unplanned fleet downtime
Applications
Perfect for REV Group fire trucks, rescue rigs, aerial units, and support vehicles powered by Cummins ISL engines. This DEF Head Unit ensures emissions compliance and system uptime during frequent stop-and-go, high-idle, and emergency drive cycles.
Installation Notes
Turn off power and relieve DEF system pressure before servicing. Clean DEF lines and tank area thoroughly to remove contaminants or residue. Install with OEM connectors and secure all fluid and electrical plugs. After installation, clear diagnostic codes and verify DEF metering and sensor outputs with a diagnostic scan tool.
Final Thoughts
If your REV Group apparatus experiences DEF system alerts, dosing inconsistencies, or SCR-related malfunctions, this Cummins ISL-specific DEF Head Unit is the OEM solution for mission-critical reliability. Designed for emergency readiness and emissions consistency—available now at Tamerx.