4329542

Description

Overview

4329542 is a DOC used in the diesel oxidation catalyst section of the exhaust aftertreatment system. It is designed for PACCAR engines and supports oxidation of hydrocarbons and carbon monoxide and heat generation for DPF regeneration in heavy duty service. Paccar engines power many Kenworth and Peterbilt class 8 trucks in long haul and regional haul service.

What this part does

This diesel oxidation catalyst promotes oxidation of hydrocarbons and carbon monoxide in the exhaust stream. It also helps generate heat that supports regeneration of the diesel particulate filter downstream.

Where this part fits

This part is generally used on PACCAR engine platforms installed in class 8 trucks and heavy equipment. Exact fitment depends on the specific engine family, emission level, and chassis configuration.

OEM and cross references

This part may replace or cross reference the following numbers:

• 2015

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.
• When replacing a DOC it is important to correct any fuel dosing issues, exhaust leaks, or oil carryover that may have contaminated the original catalyst.

Specifications

• Part type: DOC
• OEM or application group: PACCAR
• Additional cross references are listed in the section above.

Related components

During service you may also need clamps, gaskets, sensors, mounting hardware, or additional aftertreatment components depending on the specific installation.