RETAINER 4L7827 - Caterpillar

Illustration 4 g02574776
(6) Flame detection temperature sensor
Table 6
Troubleshooting Test Steps     Values     Results    
7. Clean the Flame Detection Temperature Sensor
A. Remove the flame detection temperature sensor (6).
B. Clean the flame detection temperature sensor. Use a nonmetallic cleaning pad to clean the sensor.
   
Clean sensor    
Result: The components are clean. The flame detection temperature sensor is not damaged. Install the flame detection sensor.
Proceed to Test Step 8.
Result: The flame detection temperature is damaged. Replace flame detection temperature sensor.
Proceed to Test Step 8.    
8. Check the ARD for Proper Operation
A. Reset all active codes and clear all logged codes. Use Cat ET to perform an "ARD Ignition Test" in order to verify that the problem is resolved.
The ARD Ignition Test cannot be performed if the DPF soot loading is above 80%. When the DPF soot loading is above 80%, the Manual DPF Regeneration must be performed using Cat ET.
   
Successful test    
Result: The test is successful.
Proceed to Test Step 11.
Result: The test is not successful.
Proceed to Test Step 9.
Result: The test is not successful. There are additional codes.
Troubleshoot the additional codes. Refer to Troubleshooting for the correct procedure.
Verify that the problem is resolved.
   
Illustration 5 g02574802
Components of the ARD combustion head (7) ARD pilot filter connector (8) ARD main filter connector (If equipped)
Table 7
Troubleshooting Test Steps     Values     Results    
9. Replace the Pilot Filter Connector at the ARD Combustion Head
A. Flush the ARD fuel system and replace the pilot filter connector at the ARD combustion head. Refer to Systems Operation/Testing and Adjusting, "Fuel System - Flush" for additional information.
B. Reset all active codes and clear all logged codes. Perform the "ARD Ignition Test" using Cat ET and verify that there are no fuel leaks. Refer to System Operation/Testing and Adjusting, "ARD Fuel System - Test".
The ARD Ignition Test cannot be performed if the DPF soot loading is above 80%. When the DPF soot loading is above 80%, the Manual DPF Regeneration must be performed using Cat ET.
   
Successful test    
Result: The test is successful.
Proceed to Test Step 11.
Result: The test is not successful.
Proceed to Test Step 10.
Result: The test is not successful. There are additional codes.
Troubleshoot the additional codes. Refer to Troubleshooting for the correct procedure.
Verify that the problem is resolved.
   
Illustration 6 g02606408
(9) Fouled slot
Illustration 7 g02606409
(10) Acceptable soot accumulation
Table 8
Troubleshooting Test Steps     Values     Results    
10. Inspect ARD Swirl Plate
A. Remove ARD head. Refer to Disassembly and Assembly, "Combustion Head Group (ARD) - Remove and Install - Clean Emissions Module" for the proper procedure to remove the ARD combustion head.
Soot accumulation is normal. Slot fouling is defined as more than 1/2 the inner row slots being completely blocked. Partially blocked inner row slots are normal and do not affect regeneration performance. Refer to Illustrations 6 and 7 to verify if the swirl plate is fouled.
B. Inspect the swirl plate for fouled slots. Refer to Illustrations 6 and 7 to verify if the swirl plate is fouled.