Engine Overspeeds
Use this procedure in order to troubleshoot an engine overspeed or use this procedure if one of the following event codes is active.
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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) |
- Turbocharger
- Intake air and starting aids
- Drop of load
Note: The procedures have been listed in order of probability. Complete the procedures in the order of the listed test steps.
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Troubleshooting Test Steps | Values | Results |
---|---|---|
1. 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 2. |
2. 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. |
3. 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).
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