Retrofit SCR Aftertreatment Caterpillar

Note: Disposition and Recycling - Common components of exhaust aftertreatment devices include, but are not limited to, cordierite, silicon carbide, iron zeolite, vanadium, platinum, and palladium. After the devices are used in an engine exhaust flow they can include some by-products that result from combustion. Follow applicable Federal, State, and local regulations when handling or discarding used aftertreatment devices.

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Illustration 1	g03689790

1. Remove Diesel Particulate (DPF) hatch cover (1) nuts, bolts, and washers.

2. Remove hatch cover (1) from the reactor unit.

3. Remove gasket assembly from the sealing surface of the hatch cover.

4. Carefully remove DPF catalyst assembly by removing the V band clamps. If necessary, repeat for other PDF catalysts. Take note of DPF air flow direction and location for reassembly.

5. Carefully install DPF catalyst into the cabinet with new gaskets. Verify correct position and air flow direction of the DPF.

6. DPFs should always be installed in the direction shown in illustration 1. The long end of the DPF should be installed in the sleeve of the reactor and secured with the proper V band clamps.

7. For verified applications, replacement DPFs must have the proper tags and meet all documentation requirements.

8. Apply final torque to V band clamps. Refer to Specifications, SENR3130, "Torque Specifications" for the proper torque.

9. Replace all inner backing strip gaskets on the DPF catalyst cover.

10. Install DPF cover assembly.

11. Replace all damaged bolts.

12. Apply final torque to all bolts in a circular pattern. Refer to Specifications, SENR3130, "Torque Specifications" for the proper torque.

13. Verify that all bolts are at the proper torque value.