Purpose-Built for Response Excellence: E‑ONE Cummins ISL DEF Head Unit (OEM 1113741‑002)
What is it?
The E‑ONE Cummins ISL DEF Head Unit (OEM 1113741‑002) is a specialized emissions control module integrated into the Selective Catalytic Reduction (SCR) system of E‑ONE apparatus powered by Cummins ISL engines. It precisely meters Diesel Exhaust Fluid (DEF) into the exhaust stream to reduce harmful NOx emissions while built-in sensors continuously monitor DEF fluid level, temperature, and pressure to ensure top-tier dosing accuracy and system reliability in mission-critical vehicles.
Why choose the OEM 1113741‑002 DEF Head Unit?
Engineered specifically for E‑ONE fire trucks and rescue vehicles equipped with Cummins ISL engines, this DEF Head Unit provides plug‑and‑play compatibility with factory ECM calibration and harness wiring—no retrofit needed. Its OEM-grade design virtually eliminates SCR error codes, limp-mode events, and dosing inconsistencies that are common with generic replacements. Built for emergency duty ruggedness, it offers unmatched reliability when response timing matters most.
Key Benefits
✅ Direct OEM fit for E‑ONE apparatus using Cummins ISL engines
✅ Precisely regulates DEF dosing for maximum NOx reduction
✅ Continuous monitoring via integrated sensors (fluid level, temperature, pressure)
✅ Engineered to resist DEF crystallization, harsh vibration, moisture, and heat
✅ Helps prevent SCR faults, derates, and emissions compliance failures
Applications
Tailored for E‑ONE fire and rescue vehicles—including aerials, pumpers, and wildland units—equipped with Cummins ISL diesel engines. This DEF Head Unit ensures dependable SCR system performance under high-idle cycles, frequent duty activation, and challenging field conditions.
Installation Notes
Prior to installation, disconnect the battery and fully depressurize the DEF system. Thoroughly clean the DEF tank and lines to remove residue or crystallized deposits. Use OEM connector fittings and secure all fluid and electrical connections. Once installed, clear any diagnostic codes and verify DEF dosing and sensor output via a scan tool before putting the vehicle back into service.
Final Thoughts
For E‑ONE vehicles powered by Cummins ISL engines showing SCR system alerts, dosing faults, or emissions errors, the OEM 1113741‑002 DEF Head Unit is the definitive fix. Engineered for compatibility, precision, and resilient operation, it restores critical DEF system performance—ready to ship from Tamerx for life-saving reliability.