Emission Control Built for the Clean Crew: MCNEILUS Cummins ISL DEF Head Unit
What is it?
The MCNEILUS Cummins ISL DEF Head Unit plays a vital role in the SCR (Selective Catalytic Reduction) system of MCNEILUS refuse trucks and municipal vehicles powered by Cummins ISL engines. It regulates Diesel Exhaust Fluid (DEF) flow into the exhaust stream to reduce NOx emissions, while sensors monitor fluid level, temperature, and pressure to maintain dependable dosing—even under frequent stop/start cycles and demanding service routines.
Why opt for this OEM DEF Head Unit?
Designed to match MCNEILUS chassis and Cummins ISL configurations, this OEM module connects directly to factory ECM wiring—no modifications needed. It provides consistent DEF delivery and helps prevent dosing problems, SCR system alerts, and engine derates that can result from non-OEM parts. Hardworking judgment-compliant and up-for-every-shift, it keeps your fleet running clean and compliant.
Key Benefits
✅ OEM drop-in fit for MCNEILUS trucks using Cummins ISL engines
✅ Stable DEF system support for strict NOx control
✅ Sensor-based tracking of fluid level, temperature, and pressure in real time
✅ Durable design handles vibration, DEF crystallization, thermal swings, and wet/dirty conditions
✅ Reduces SCR fault codes, limp-mode activation, and downtime
Applications
Ideal for MCNEILUS refuse collection vehicles, street sweepers, and utility fleet assets with Cummins ISL power. Promotes emissions system consistency across neighborhood routes, yard turnaround, and urban operations.
Installation Notes
Prior to swapping in, shut off power and depressurize the DEF system. Thoroughly clean the DEF tank and connector interfaces to remove contaminants and residue. Install using factory connectors and secure all fluid lines and sensor plugs. After installation, clear diagnostic trouble codes and verify proper DEF dosing and sensor feedback using a scan tool before returning to service.
Final Thoughts
If your MCNEILUS refuse truck is showing DEF system warnings, SCR-related errors, or dosing problems, this OEM DEF Head Unit offers the dependable solution you need. Designed for municipal-operational durability and emissions compliance, it ensures your equipment stays ready to serve—available now through Tamerx.