MOTOR GP-ELEC 10R2985 - Caterpillar

Use this procedure to troubleshoot an engine overspeed. Also, use this procedure if one of the following event codes is active or logged.
Table 1
J1939 Code and Description CDL Code and Description Comments
190-0
Engine Speed : High - most severe (3) E362 (3)
Engine Overspeed The engine has exceeded the maximum speed for time.
190-15
Engine Speed : High - least severe (1) E362 (1)
Engine Overspeed The engine has exceeded the maximum speed for time.
190-16
Engine Speed : High - moderate severity (2) E362 (2)
Engine Overspeed The engine has exceeded the maximum speed for time. Probable Causes
Steep grades (if applicable)
Turbocharger
Intake airRecommended Actions
Table 2
Troubleshooting Test Steps Values Results
1. Verify that the Overspeed Is not from Going Down Steep Grades
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.
Control the engine speed during steep grades. Return to service.
Result: Steep grades are not the cause of the overspeed.
Proceed to Test Step 2.
2. Check for Proper Operation of the Turbocharger
A. Check for any oil that may be leaking into the inlet air.
Turbocharger
Result: The turbocharger is leaking oil into the inlet.
Repair: Repair or replace the turbocharger.
Result: The turbocharger is not leaking oil into the inlet.
Proceed to Test Step 3.
3. Check the Quality of the Inlet 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.
Contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).