Cummins ISB DOC

Trusted Emissions Solution: Cummins ISB DOC

What is it?
The Cummins ISB Diesel Oxidation Catalyst (DOC) is a critical emissions component for ISB engine platforms. It oxidizes hydrocarbons (HC) and carbon monoxide (CO) in exhaust gases, helping to clean the exhaust stream and support downstream after-treatment components like DPFs and SCR catalysts.

Why Choose the Cummins ISB DOC?
This DOC is engineered to match Cummins’ specifications for the ISB engine series, ensuring proper mounting, sensor integration, and exhaust flow dynamics. Using the correct DOC supports stable exhaust system behavior, helps prevent issues like increased back-pressure, and contributes to overall after-treatment reliability.

Key Benefits
✅ Direct-fit design with factory mounting and sensor compatibility
✅ Robust construction ideal for heavy-duty conditions and continuous operation
✅ Efficient oxidation of HC and CO, promoting cleaner exhaust output
✅ Helps minimize emission-system faults and supports consistent vehicle operation
✅ Protects downstream parts by delivering cleaner exhaust to the next stage

Applications
This DOC is suitable for Cummins ISB‐powered trucks and equipment where an emissions after-treatment system is required. It is especially relevant for fleet vehicles, medium- to heavy-duty applications and equipment where emissions reliability matters.

Installation Notes
Professional installation is recommended. Confirm engine compatibility and identify the correct part before removal. Remove the old DOC, clean all mating surfaces, inspect sensors, and replace any worn seals or gaskets. Install the new unit with proper orientation and torque, reconnect sensors, clear any stored codes, and run the system to verify stable exhaust temperatures and flow.

Final Thoughts
A correctly specified DOC is foundational to a stable after-treatment system. The Cummins ISB DOC delivers reliable oxidation performance, supports system durability, and contributes to the long-term operational readiness of your vehicle’s emissions infrastructure.