SEAL-LIP TYPE 8F5340 - Caterpillar

Use this procedure in order to troubleshoot an engine overspeed or use this procedure if one of the following event codes is active.
Table 1
Event Code
J1939 Code and Description Conditions which Generate this Code System Response
190-15 Engine Speed : High - least severe (1) The engine rpm has exceeded the trip point for engine overspeed for the delay time. The code is logged. The ECM may shut down the engine.
190-0 Engine Speed : High - most severe (3) Probable Causes
Steep grades (if applicable)
Turbocharger
Intake air and starting aids
Drop of loadRecommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in the order of the listed test steps.
Table 2
Troubleshooting Test Steps Values Results
1. Proceeding Down Steep Grades (If Applicable)
Engaging the engine brakes on a steep grade may be necessary.
A. The operator needs to understand the proper operation of the machine while using the engine brakes.
Not all applications have engine brakes.
Steep grades
Result: Steep grades are the cause of the overspeed.
Repair: Control the engine speed during steep grades.
Verify that the repair eliminated the problem.
Result: Steep grades are not the cause of the overspeed.
Proceed to Test Step 2.
2. Proper Operation of the Turbocharger
A. Check for proper operation of the turbocharger.
B. Check for any oil that may be leaking into the air inlet.
Turbocharger
Result: The turbocharger is leaking oil into the inlet.
Repair: Repair or replace the turbocharger.
Verify that the repair eliminated the problem.
Result: The turbocharger is not leaking oil into the inlet.
Proceed to Test Step 3.
3. Intake Air
A. Check for combustible gases in the surrounding atmosphere.
B. Check for proper operation of starting aids (if equipped).
Air quality
Result: The atmosphere has combustible gases.
Repair: Do not operate the engine in an environment with combustible gases.
Verify that the repair eliminated the problem.
Result: The atmosphere does not have combustible gases.
Proceed to Test Step 4.
4. Check for a Sudden Drop of Engine Load
A. Converse with the operator about the overspeed event.
Engine load
Result: The operator confirms that the overspeed was caused by a sudden drop of engine load.
Repair: Decrease the load on the engine gradually.
Verify that the repair eliminated the problem.
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).