Crane operations demand reliability under every condition. For Tadano cranes powered by the Cummins ISL engine, the DEF (Diesel Exhaust Fluid) head unit is one of those critical parts that often goes unnoticed — until it fails. The Tadano Crane Cummins ISL DEF Head Unit (OEM 5142426-01) ensures your aftertreatment system remains accurate and compliant. If it malfunctions, you could see emissions errors, derates, or engine performance disruptions — all of which are unacceptable on a jobsite.
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Continuously measures DEF fluid temperature, level, and urea concentration, then relays those readings to the engine control module
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Controls precise dosing of DEF into the exhaust stream so the SCR (Selective Catalytic Reduction) system can reduce NOx emissions effectively
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Engineered exactly to OEM 5142426-01 specifications, allowing seamless fit and integration with Tadano Cummins ISL systems
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Helps prevent fault codes, warning lights, and engine derates that can stem from sensor inaccuracies
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Built to withstand vibration, thermal variation, and exposure to corrosive DEF fluid
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Designed for ease of installation—reducing machine downtime
A failing DEF head can quietly degrade system performance until it triggers a warning at the worst possible moment. By installing the OEM 5142426-01 unit, you restore accurate sensing, safeguard emissions integrity, and keep your crane running when every minute counts. Prioritize this upgrade and avoid costly surprises down the line.




























































































































































































































































































