Description
Overview
4394674 is a SCR used in the selective catalytic reduction section of the exhaust aftertreatment system. It is designed for CUMMINS engines and supports reduction of nitrogen oxides using diesel exhaust fluid in heavy duty service. Cummins produces heavy duty diesel engines widely used in class 8 highway tractors and vocational trucks.
What this part does
This SCR catalyst uses diesel exhaust fluid injection upstream to convert nitrogen oxides into nitrogen and water. It is a key component for meeting modern NOx emission standards on class 8 trucks and heavy equipment.
Where this part fits
This part is generally used on CUMMINS engine platforms installed in class 8 trucks and heavy equipment. Exact fitment depends on the specific engine family, emission level, and chassis configuration.
Installation and replacement notes
- Confirm compatibility with the engine family and emission certification level before ordering.
- Inspect related components for damage or contamination that may have contributed to the original failure.
- Follow OEM torque specifications and service procedures during installation.
- For SCR service always verify diesel exhaust fluid quality, inspect the DEF injector, and confirm that dosing and mixer hardware are in good condition.
Specifications
- Part type: SCR
- OEM or application group: CUMMINS
Related components
During service you may also need clamps, gaskets, sensors, mounting hardware, or additional aftertreatment components depending on the specific installation.
