Perkins Engines Perkins DEF Head Unit

Emissions Control Renewed for Perkins – OEM DEF Head Unit (T434606)

What is it?
The OEM T434606 DEF Head Unit is the factory-designated header assembly for Perkins engines equipped with SCR (Selective Catalytic Reduction) systems. This component mounts atop the DEF tank and includes necessary sensors to monitor fluid level, temperature, and fluid quality—ensuring accurate Diesel Exhaust Fluid delivery for emissions compliance.

Why choose this OEM DEF Head Unit?
Crafted to Perkins’ original specifications, this head unit delivers precise sensor calibration, correct sealing, and plug-and-play compatibility with your engine’s emissions electronics. Using the genuine unit helps prevent DEF system faults, leaks, erratic readings, or error codes associated with lower‑quality aftermarket parts.

Key Benefits
 ✅ Direct OEM fit for Perkins SCR‑equipped engines
 ✅ Accurate monitoring of DEF fluid level and temperature
 ✅ Sealed construction to avoid leaks and contamination
 ✅ Supports factory diagnostics and SCR control integration
 ✅ Built to endure engine bay heat, vibration, and operational stress

Applications
This DEF Head Unit is appropriate for Perkins-powered equipment—construction, industrial, agricultural, or generator units—that utilize SCR/DEF aftertreatment. It’s critical for applications where emissions control, system stability, and DEF monitoring are essential.

Installation Notes
Professional installation is recommended. Begin by depressurizing or isolating the DEF system. Clean the tank’s mounting surface and inspect for damage. Replace any worn O‑rings or gaskets. Install the head unit and torque it to OEM specification. After installation, verify sensor performance, check for leaks, and use diagnostics to clear any DEF or SCR–related fault codes.

Final Thoughts
If your Perkins engine is signaling DEF errors, inaccurate level readings, or you’re servicing the SCR system, the OEM T434606 DEF Head Unit restores reliable emission sensing and system stability. It’s a factory‑matched solution that helps your equipment remain compliant, predictable, and operating cleanly.