Detroit Diesel — Inspection
Testing & diagnosis · Aftertreatment Device (ATD)
From a Detroit Diesel service manual — check it applies to your exact model before use.
Before you start
- The most important means to qualify a failed or damaged filter is by visual inspection of the substrate.
Procedure
- Inspect outlet section for evidence of soot residue. If found, ATD should be replaced.
- Inspect DPF outlet face for evidence of soot residue. If found, ATD should be replaced.
- If no soot is found in step 1 or 2, DPF should be considered serviceable.
- Inspect inlet face for plugging. If DPF is plugged, ATD should be replaced.
Source: Detroit Diesel service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.