Oshkosh Cummins ISB 6.7L, B6.7 DEF Head Unit

DEF System Stability for Oshkosh Cummins ISB 6.7 / B6.7: OEM DEF Head Unit (A000P868)

What is it?
The OEM A000P868 DEF Head Unit is a factory‐specified DEF (Diesel Exhaust Fluid) tank header assembly designed for Oshkosh vehicles powered by Cummins ISB 6.7L or B6.7 engines. This remanufactured unit (TamerX part number 2321‑18‑4) includes sensors and the necessary header components to monitor DEF fluid level, temperature, and ensure proper DEF delivery under SCR emissions systems.

Why choose this OEM DEF Head Unit?
Built to original OEM specifications, this head unit ensures precise alignment, proper sealing, and compatibility with DEF system diagnostics in Oshkosh applications. Using the genuine or remanufactured OEM part helps avoid DEF header warning codes, erratic fluid readings, fluid leaks, and reliability issues that can arise with lesser quality substitutes.

Key Benefits
 ✅ Exact fit for Oshkosh Cummins ISB 6.7L / B6.7 applications
 ✅ Includes factory sensors for fluid level and temperature monitoring
 ✅ Proper sealing to prevent leaks and maintain DEF system integrity
 ✅ Remanufactured unit with One Million Miles or One Year Warranty
 ✅ Compatible with existing plumbing, wiring, and diagnostics

Applications
Intended for use in Oshkosh vehicles equipped with Cummins ISB 6.7L / B6.7 engines. This part is especially useful when the DEF system has warning lights, fluid level issues, or when performing DEF system maintenance, restoration, or repair.

Installation Notes
Have a certified technician perform installation. Depressurize or isolate the DEF system first. Clean the mounting surfaces and inspect O‑rings or gaskets; replace as needed. Torque bolts per Oshkosh / Cummins OEM specifications. After installation, verify sensor readings, ensure there are no leaks, and clear any DEF system fault codes.

Final Thoughts
When your Oshkosh truck with Cummins ISB 6.7L / B6.7 power is showing DEF-related faults or unreliable DEF system behaviour, the OEM A000P868 DEF Head Unit offers a reliable, OEM‐matched solution. This head unit restores sensor accuracy, system sealing, and emission compliance—helping your vehicle run cleaner and more dependably.