Westman Equipment Cummins ISB 6.7L DEF Head Unit

DEF System Integration: Westman Equipment Cummins ISB 6.7L DEF Head Unit (OEM 3600821)

What is it?
The Westman Equipment Cummins ISB 6.7L DEF Head Unit (OEM 3600821) is a key control module in the Diesel Exhaust Fluid (DEF) system for equipment powered by the Cummins ISB 6.7L engine. It handles fluid level sensing, temperature monitoring, suction flow monitoring, and feeds accurate dosing information to the Selective Catalytic Reduction (SCR) system.

Why Choose the Westman Equipment Cummins ISB 6.7L DEF Head Unit (OEM 3600821)?
This head unit is built to match OEM specifications for the Westman Equipment chassis and Cummins ISB 6.7L engine configuration. Its mounting, electrical interfaces, fluid ports, and sensor placements all align with factory standards—ensuring minimal installation risk, proper communication with the SCR system, and reliable emissions‑control operation.

Key Benefits
✅ OEM‑Correct Fitment: Designed for direct replacement without modifications, matching factory mounting and interfaces.
✅ Industrial‑(Duty) Durability: Built to withstand heavy‑use conditions found in yard trucks, terminals, or special‑purpose vehicles.
✅ Accurate DEF Control: Monitors fluid level, temperature, and flow to ensure correct dosing, which supports optimal SCR function.
✅ Reduced Risk of Faults: Factory‑matched component helps avoid DEF or aftertreatment diagnostic codes, reducing downtime.
✅ Extended System Reliability: Proper DEF management helps protect downstream SCR catalysts, sensors, and exhaust components.

Applications
This head unit is ideal for Westman Equipment yard trucks, terminal tractors, or material‑handling vehicles equipped with the Cummins ISB 6.7L engine, where an integrated DEF system and emissions control are required for reliable operations.

Installation Notes
A professional install is highly recommended. Verify that your engine and chassis configuration align with the part number OEM 3600821. Prior to installation, power down the DEF system and relieve any residual fluid pressure. Remove the existing head unit, noting all wiring, fluid lines, sensors, and mounting hardware. Clean the mating surfaces thoroughly, replace any worn gaskets or seals, and install the new unit respecting orientation and torque specifications. Ensure all sensors and fluid lines are properly connected. After installation, clear any diagnostic trouble codes, run the equipment through its initial cycle, and monitor DEF dosing, fluid level, and SCR system behavior to confirm proper function.

Final Thoughts
The reliability of your DEF and SCR system is crucial for emissions compliance and operational uptime. The Westman Equipment Cummins ISB 6.7L DEF Head Unit (OEM 3600821) provides a factory‑matched, durable solution designed to keep your system functioning as intended in heavy‑duty industrial applications.