When operating Ditch Witch equipment powered by the Cummins ISB 6.7L engine, your emissions aftertreatment system faces harsh conditions: vibration, heat cycles, and exposure to corrosive fluids. Among all the components in that system, the DEF (Diesel Exhaust Fluid) head unit is one of the most critical—and one of the most vulnerable. The right DEF head can mean the difference between smooth operation and costly downtime.
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Continuously senses DEF fluid level, temperature, and urea concentration, providing accurate data to the engine control module
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Precisely regulates DEF dosing into the exhaust stream so the SCR (Selective Catalytic Reduction) system reduces NOx emissions correctly
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Built to meet OEM tolerances for Cummins ISB 6.7L, ensuring seamless compatibility with Ditch Witch applications
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Helps prevent fault codes, emissions warnings, and engine derates triggered by sensor drift or bad readings
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Designed to withstand vibration, temperature cycling, and exposure to harsh DEF fluid chemistry
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Engineered for straightforward field replacement to cut down on service time
Because Ditch Witch machines often work in rugged environments, even a small error in DEF sensing can quickly cascade into a serious emissions system fault. Installing the correct OEM-grade DEF Head Unit restores the feedback loop your system depends on, helps maintain compliance, and keeps your machine working reliably. Don’t let a failed sensor become a weak link—protect your operation with the right component.