Due to number of different exhaust aftertreatment applications, this procedure is generic. Illustrations within
this procedure will not represent all applications.
The exhaust aftertreatment system is composed of four sections:
1 Inlet
2 Aftertreatment diesel oxidation catalyst
3 Aftertreatment diesel particulate filter
4 Outlet
NOTE: In some applications the aftertreatment diesel oxidation catalyst can be integrated into the inlet of the
exhaust aftertreatment system.
NOTE: In some applications, the Aftertreatment Diesel Oxidation Catalyst and the Aftertreatment Diesel Particle
Filter will be contained within one canister. This procedure refers to this system as a “Joined Aftertreatment Diesel
Oxidation Catalyst-Aftertreatment Diesel Particle Filter”. Aftertreatment systems with a Joined Aftertreatment Diesel Oxidation Catalyst-Aftertreatment Diesel Particle Filter use three-bolt joint connections.
NOTE: If the aftertreatment diesel particulate filter is being replaced due to progressive damage from engine oil or
coolant, clean the tailpipe from the turbocharger outlet to the aftertreatment diesel oxidation catalyst, including the
aftertreatment inlet. Refer to Procedure 011-048 in Section 11.
NOTE: Do not steam clean the inlet of the diesel oxidation catalyst.
A variation in vehicle aftertreatment configuration will require the aftertreatment system to have different
flanges. There are two types of flanged joints, spherical Marman and full Marman. The spherical Marman (1) joints
allow a small amount of misalignment and have a rounded cross section. The full Marman (2) joints are completely
rigid and have a more edgy profile.
