Cummins ISB 6.7 DOC

Precise Emission Control Component: Cummins ISB 6.7 DOC

What is it?
The DOC—Diesel Oxidation Catalyst—for the Cummins ISB 6.7 engine is an essential part of the after-treatment system. It serves to oxidize hydrocarbons (HC) and carbon monoxide (CO) in the exhaust stream, reducing harmful emissions before they reach downstream components such as the DPF and SCR modules.

Why Choose the Cummins ISB 6.7 DOC?
This DOC is engineered specifically for the ISB 6.7 engine platform to ensure proper fitment, exhaust flow dynamics, and mounting geometry. Selecting the correct DOC helps maintain exhaust system balance, avoid excessive back-pressure, and preserve overall system reliability.

Key Benefits
✅ Designed for factory compatibility—mounts, flanges and sensor ports align with original specifications.
✅ Constructed to endure high exhaust temperatures, soot loads and heavy-duty operating cycles.
✅ Supports oxidation of HC and CO to promote cleaner exhaust output.
✅ Helps reduce emission-system faults, promoting more reliable operation.
✅ Protects downstream after-treatment components by maintaining optimal exhaust conditions.

Applications
This DOC is suitable for medium- to heavy-duty trucks and equipment powered by the Cummins ISB 6.7 engine, especially in applications where emissions control and durability are critical.

Installation Notes
It is recommended that installation be performed by a qualified technician. First verify engine configuration and compatibility. Remove the existing DOC, inspect the exhaust flanges, clamps and sensors for wear or soot buildup, and clean all mating surfaces thoroughly. Install the new DOC with correct orientation and torque, replace any gaskets or seals, reconnect sensors, and clear diagnostic fault codes. After installation, monitor the exhaust temperature, back-pressure and system readings to confirm proper operation.

Final Thoughts
A properly configured DOC is foundational to an efficient and compliant emissions system. The Cummins ISB 6.7 DOC offers a reliably engineered solution tailored to the engine platform—helping maintain system integrity and performance under demanding conditions.