C3.4B Engines for Caterpillar Built Machines Caterpillar

Required Tooling

Test Procedure

1. Remove the Diesel Exhaust Fluid (DEF) injector from the Clean Emissions Module (CEM). Refer to Disassembly and Assembly, "DEF Injector and Mounting - Remove and Install" for the correct procedure.

   Note: Leave the coolant lines, DEF line, and the electrical connector connected to the DEF injector.

2. Assemble the DEF collection container from Tooling (A). Three bolts and wing nuts will connect the DEF injector to the lid for the collection container.

   Note: Tooling (B) may be required to allow the DEF injector to be moved to a convenient location for testing.

3. Turn the key switch to the ON position.

4. Connect to the electronic service tool.

5. Click "Diagnostics" in the main menu, then click "Diagnostic Tests".

6. Proceed by clicking "DEF Dosing System Accuracy Test".

7. Click "Start" to proceed with the test.

   Note: With the DEF injector dosing, inspect the spray pattern. The injector spray pattern should be finely atomized and conical.

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   Illustration 1	g03370954
   Typical example

8. After the test has completed, check the measuring container to inspect the amount of DEF in the container. Dispose of the collected DEF as per local regulations and mandates.

   Specification for DEF sprayed during dosing test ... 240 mL ± 10 mL

9. Reinstall the DEF injector assembly. Refer to Disassembly and Assembly, "DEF Injector and Mounting - Remove and Install" for the correct procedure.