KIT-SEAL- 3367352 - Caterpillar

Note: Refer to this procedure if the interval between DPF regenerations has changed.
Table 1
Troubleshooting Test Steps Values Results
1. Check the Regeneration History
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Open the "Information" tab.
C. Open the "History" tab.
D. Open the "Aftertreatment Regeneration History" tab.
E. Verify the following information:
1. If the regeneration intervals have changed
2. If the regeneration was manual or automatic
3. The soot level when the regenerations occurred.
Regeneration History
Result: The engine has logged less than 5000 hours since the last ash service regeneration
Proceed to Test Step 2.
Result: The engine has logged 5000 hours since the last ash service regeneration
Repair: Perform an ash service.
Refer to Special Instruction, REHS8180, "Aftertreatment Filter Maintenance on Tier 4 Final Products Equipped with a Diesel Particulate Filter (DPF), Diesel Oxidation Catalyst (DOC) and a Selective Catalyst Reduction (SCR) Filter".
2. Inspect for Restrictions
A. Remove the DPF Differential Pressure sensor and lines group.
B. Closely inspect the sensors, elbows, lines, and manifold for restrictions. Restrictions could be caused by an accumulation of moisture, ice, or soot.
Restrictions
Result: Restrictions were not found.
Proceed to Test Step 3.
Result: Restrictions were found.
Repair: Replace the affected components. Perform a "Manual DPF Regeneration" using Cat ET to verify that the problem is resolved.
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).