Lodal Cummins ISB 6.7L

Precision DEF Control for Cummins ISB 6.7L Engines

What Is It?

The OEM 3600821 is a remanufactured Diesel Exhaust Fluid (DEF) head unit designed specifically for Cummins ISB 6.7L engines. This module manages fluid level, temperature, and dosing flow within the SCR system, and includes a DEF filter (40-micron) and built-in heater. The unit is backed by a one-year or one-million-mile warranty.

Why Choose OEM 3600821?

Engineered to meet both Cummins and Lodal factory standards, this head unit delivers accurate DEF system working conditions without requiring modifications. Its calibration ensures plug-and-play compatibility with the vehicle’s SCR electronics, minimizing fault codes and maximizing uptime.

Key Benefits

✅ Tailored for Cummins ISB 6.7L platforms used by Lodal systems
✅ Integrated DEF filtration and heating for system reliability
✅ Accurate monitoring of DEF level, temperature, and flow
✅ Pre-calibrated for OEM system controllers and wiring harness
✅ Substantial warranty support—up to 1,000,000 miles or 1 year 

Applications

This DEF head unit is ideal for vehicles equipped with Lodal aerial or utility bodies built on Cummins ISB 6.7L chassis. It secures consistent SCR operation in municipal fleet trucks, service vehicles, and industrial platforms requiring emissions integrity.

Installation Notes

Installation should be performed by a qualified technician. Inspect DEF tank ports, wiring harnesses, and connectors before mounting the unit. Once installed, run a full SCR system diagnostic to verify fluid level accuracy, temperature response, and clear any active fault codes.

Final Thoughts

The OEM 3600821 DEF Head Unit delivers proven DEF system control tailored to Lodal/Cummins ISB configurations. With defect-free fitment, factory-calibrated sensors, and warranty-backed support, it helps maintain emissions compliance, avoids SCR faults, and ensures continued vehicle readiness.