ROD AS - HYD 0R8922 - Caterpillar

If excessive black smoke is caused by a fault in the engine, and the engine is equipped with a wall-flow Diesel Particulate Filter (DPF), the smoke will only be visible when the DPF has also failed. Perform the following procedure to diagnose the cause of the black smoke and then investigate the failure of the DPF.A faulty DPF will allow some smoke to be visible. In this situation, there may not be a fault in the engine.If excessive black smoke is caused by a fault in the engine, and the engine is equipped with a through-flow DPF, the DPF will allow some smoke to be visible. This condition does not mean that the DPF has failed.Note: If the DPF is replaced as part of this procedure, use the electronic service tool to perform the "DPF Replacement Reset".Note: If the DPF is replaced as part of this procedure, use the electronic service tool to perform the "DPF Replacement Reset".Probable Causes
Diagnostic codes
Parameters in the Electronic Control Module (ECM)
Air intake system or exhaust system
Valve lash
Turbocharger
Low compression (cylinder pressure)
Electronic unit injectors
Individual malfunctioning cylinderRecommended Actions
Note: Complete the procedure in the order in which the steps are listed.
Table 1
Troubleshooting Test Steps Values Results
1. Diagnostic Codes
Note: Certain diagnostic codes and/or event codes may cause poor performance. Refer to in the electronic service tool.
A. Use the electronic service tool to check for active or logged codes.
Engine Derate or Diagnostic Codes
Result: A diagnostic code is present.
Troubleshoot the code. Refer to Troubleshooting, "Diagnostic Trouble Codes"
Result: A diagnostic code is not present.
Proceed to Test Step 2.
2. Parameters in the Electronic Control Module (ECM)
A. Use the electronic service tool to verify that the correct parameters are being used. Refer to Troubleshooting, "Configuration Parameters" for additional information.
Parameters
Result: The parameters are not correct.
Input the correct parameters. Refer to Troubleshooting, "Configuration Parameters" for additional information.
Result: The parameters are correct.
Proceed to Test Step 3.
3. Air Intake and Exhaust System
A. Check the air filter restriction indicator, if equipped. Replace a plugged air filters. Refer to the Operation and Maintenance Manual.
B. Check the air inlet and exhaust system for restrictions and/or leaks. Refer to Systems Operation, Testing and Adjusting, "Air Inlet and Exhaust System - Inspect"
Restrictions
Result: There are restrictions in the air inlet or exhaust system.
Make the necessary repairs, Refer to Systems Operation/Testing and Adjusting, "Air Inlet and Exhaust System - Inspect" for additional information.
Result: There are no restrictions in the air inlet or exhaust system.
Proceed to Test Step 4.
4. Valve Lash
A. Check the valve lash. Refer to Systems Operation, Testing, and Adjusting, "Engine Valve Lash - Inspect/Adjust".
Valve lash
Result: The valve lash is not set correctly.
Set the valve lash. Refer to Systems Operation, Testing, and Adjusting, "Engine Valve Lash - Inspect/Adjust" for the correct procedure.
Result: The valve lash is correct.
Proceed to Test Step 5.
5. Turbocharger
Note: The turbocharger that is installed on the engine is a non-serviceable item. If any mechanical fault exists, then the faulty turbocharger must be replaced.
A. Ensure that the mounting bolts for the turbocharger are tight.
B. Check that the oil drain for the