Detroit Diesel — Aftertreatment Device Removal
Repair & overhaul · Aftertreatment Device (ATD)
From a Detroit Diesel service manual — check it applies to your exact model before use.
Before you start
- To avoid injury from hot surfaces, allow engine to cool before removing any component. Wear protective gloves.
- To avoid injury when removing or installing a heavy engine component, ensure the component is properly supported and securely attached to an adequate lifting device to prevent the component from falling.
- The DPF is fragile. Take special care when handling the DPF as it could be damaged or destroyed by dropping or sudden impact.
Procedure
- If necessary, remove body panel(s) or other obstruction and jack up vehicle.
- Center lifting device in position underneath ATD.
- Disconnect 5 sensors from ATD.
- Support exhaust pipe assembly with rope sling.
- Remove rear marmon clamp at connection between ATD outlet and exhaust pipe.
- Remove front marmon clamp at connection between ATD inlet and turbocharger exhaust pipe.
- Carefully loosen both ATD support straps (they are under spring tension).
- Secure ATD to lifting device with security chain and lower ATD from vehicle.
- Remove security chain.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
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.