C27 Engine for the AD55B Underground Articulated Truck Engine Overspeeds Caterpillar


Engine Overspeeds
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1.1. Probable Causes
2.1. Recommended Actions
3.2. Intake Air is Combustible
4.2. Engine Parameters
5.2. Sudden Drop of Load

------ WARNING! ------

The connection of any electrical equipment and the disconnection of any electrical equipment may cause an explosion hazard which may result in injury or death. Do not connect any electrical equipment or disconnect any electrical equipment in an explosive atmosphere.

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Use this procedure in order to troubleshoot an engine overspeed or use this procedure if one of the following event codes is active. Refer to Troubleshooting, "Event Codes" for information about event codes and the default trip points for these codes. Access the monitoring system on AVSpare Electronic Technician (ET) in order to view the current trip points for these codes.

Table 1
Event Code    
Code and Description     Conditions which Generate this Code     System Response    
E362(1) Engine Overspeed     The engine rpm has exceeded the trip point for engine overspeed for the delay time.     The code is logged.    
E362(2) Engine Overspeed     The Electronic Control Module (ECM) will not power the injectors above the engine high idle speed.
The code is logged.
E362(3) Engine Overspeed    

Probable Causes

  • Intake air is combustible.

  • Engine parameter

  • Sudden drop of load

Recommended Actions

Intake Air is Combustible

Check for hydrocarbons in the surrounding atmosphere. Do not operate the engine in an environment with hydrocarbons in the surrounding atmosphere.

Engine Parameters

Verify that the current flash file has been installed and verify that the correct parameters are being used.

Sudden Drop of Load

Decrease the load on the engine gradually.

Information System:

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