Remove any residual gasket material from the flanges on the aftertreatment diesel particulate filter with a putty
knife.
NOTE: Avoid dropping fragments of gasket material into the aftertreatment diesel particulate filter.
NOTE: If the aftertreatment diesel particulate filter is being inspected due to progressive damage that introduced
engine oil, or excessive fuel into the exhaust, inspect the exhaust tailpipe from the turbocharger outlet to the
aftertreatment diesel oxidation catalyst.
If a trail of engine oil or fuel can be seen from the turbocharger outlet to the aftertreatment diesel oxidation
catalyst, the aftertreatment diesel oxidation catalyst must be replaced.
If a trail of engine oil or fuel can be seen exiting the turbocharger outlet, the exhaust tailpipe between the
turbocharger outlet and aftertreatment diesel oxidation catalyst must be cleaned. Refer to Procedure 011-048 in
Section 11.
If the aftertreatment diesel oxidation catalyst section has shifted, moved, or is loose inside the canister, replace the
aftertreatment diesel oxidation catalyst section.
Consult the Additional Aftertreatment Diesel Oxidation Catalyst and Aftertreatment Diesel Particulate Filter
Reuse Guidelines, Bulletin 4021600, to inspect the inlet and outlet faces of the aftertreatment diesel oxidation
catalyst for signs of damage.
Replace the aftertreatment diesel oxidation catalyst, if damaged.
Inspect the outlet of the aftertreatment diesel oxidation catalyst for loose debris and soot. Use a rag to wipe off
any soot. Use a HEPA vacuum to remove any remaining loose debris.
NOTE: Use a vacuum bag, such as a drywall dust bag, to capture the soot that is removed.
Attach the Cumminsยฎ aftertreatment diesel particulate filter cleaning machine cone, Part Number 4918849, to the
inlet and outlet sides of the aftertreatment diesel oxidation catalyst with the adapter rings, Part Number 4918845 and 4918846. Evenly space 4 to 5 spring clamps or C-clamps around the circumference of the aftertreatment diesel
oxidation catalyst to seal the cone and adapter ring to the aftertreatment diesel oxidation catalyst.
Service tool kit, Part Number 4918876, contains the cones and rings needed for this procedure.
If the aftertreatment diesel oxidation catalyst is integrated into the aftertreatment inlet, use one cone only, and attach it to the outlet side of the unit.
Obtain a 51 to 76 mm [2 to 3 in] rubber pipe reducer from a local supplier. If the aftertreatment diesel oxidation
catalyst is integrated into the aftertreatment inlet, obtain a 51 to 102 mm [2 to 4 in] rubber pipe reducer.
Attach the vacuum hose to the 51 mm (2 in] end of the pipe reducer. Attach the larger end of the reducer to the
aftertreatment diesel particulate filter cleaning machine cone attached to the inlet side of the diesel oxidation
catalyst. If the aftertreatment diesel oxidation catalyst is integrated into the inlet, install the larger end of the
reducer onto the aftertreatment inlet.
Use tape to seal any open ports.
Adjust the air supply for a rubber-tipped air gun to 621 kPa [90 psi].
Switch on the vacuum. The vacuum and service tool kit is properly installed if the air flow through the aftertreatment
diesel oxidation catalyst is opposite to exhaust flow.
Exhaust flow is indicated by an arrow on the canister of the diesel oxidation catalyst.
Blow compressed air across the outlet face of the aftertreatment diesel oxidation catalyst for approximately 5 minutes.
After 5 minutes, remove the aftertreatment diesel particulate filter cleaning machine cone and continue
blowing compressed air into the outlet of the diesel oxidation catalyst for an additional 10 to 15 minutes.
Maintain a 13 to 25 mm [1/2 to 1-in] distance between the air gun and diesel oxidation catalyst face. Use a sweeping
motion across the entire face of the diesel oxidation catalyst and attempt to blow air through every cell.
Allow the vacuum to operate for 1 minute after blowing out the aftertreatment diesel oxidation catalyst. After the
vacuum is switched off, disconnect the cleaning machine cone and inspect the cells of the diesel oxidation catalyst.
Inspect the cells of the diesel oxidation catalyst by looking through each cell. Shine a light on the opposite side of the
diesel oxidation catalyst to aid inspection. If the cell is clear of soot, it is possible to see straight through the
diesel oxidation catalyst.
Upon inspection, if less than 50 percent of the cells are blocked (1) the aftertreatment diesel oxidation catalyst can
be reused. If more than 50 percent of the cells remain blocked (2), repeat the cleaning procedure.
NOTE: It should not take more than two attempts to clean the face of the diesel oxidation catalyst.
Inspect the V-band clamps and aftertreatment diesel oxidation catalyst mounting straps for signs of over-
extension. The V-band must not be bent or otherwise damaged.
Replace the V-band clamps or aftertreatment diesel oxidation catalyst mounting straps if damage is found.
