HUB-END 9M5781 - Caterpillar

Electronic Technician Service Tool
When an abnormal power train operating condition occurs, the status screen on the Caterpillar Electronic Technician (ET) indicates that there is an active event.Event codes are displayed on Cat ET in the following format:EXXXX Description of the codeThe "E" means that the code is an event code. The "XXXX" is a numeric identifier. The numeric identifier is followed by a description of the code.Active event codes are listed in ascending numerical order. The code with the lowest number is listed first. The active event code is removed from the list when the condition is no longer present.Logged Event Codes
Every event code is logged in the ECM memory. Logged event codes are listed in chronological order. The most recent code is listed first.A logged code is cleared from memory when one of the following conditions occur:
The service technician manually clears the code.
A new code is logged and there are already 20 logged codes in memory. In this case, the oldest logged code is cleared.Note: Always clear logged event codes after investigating and correcting the problem which generated the code.Troubleshooting
Perform the following steps in order to troubleshoot an event:
Obtain the following information from the operator:
The event and the time of the event.
Determine the operating conditions at the time of the event of the engine. Conditions such as engine RPM and load may be important.
Determine if there are any systems that were installed by the dealer or by the customer that could cause the event.
Verify that the event is not due to normal machine operation. Verify that the event is not due to error of the operator.
Check all fluid levels and all oil levels.
Troubleshoot and repair any active diagnostic codes. Event Code List
The following table lists the event codes that apply to the Machine ECM. The recommended operator response is listed. Use the Cat ET service tool in order to determine the event codes that are active or logged.
Table 2
Event Identifier (EID) Codes
EID
Level Description Operator Response
E179 (1) Alternator Not Charging Check the alternator and wiring.
E232 (1) High Fuel/Water Separator Water Level Drain water from Fuel / Water separator.
E272 (1) Air Inlet Restriction Warning Check the engine air filter.
E360 (2) Low Engine Oil Pressure Check engine oil.
E360 (3) Low Engine Oil Pressure Immediate safe shutdown
Check engine oil.
E361 (3) High Engine Coolant Temperature Immediate safe shutdown
Reduce engine load and allow to cool down.
Activates at 110° C (230° F).
Resets at 109° C (228° F).
E391 (1) Inlet Air Restriction Check the engine air filter.
E441 (1) Idle Elevated to Increase Battery Voltage Charge Battery.
E459 (2) Engine Rated Horsepower Output Changed Engine Power Rating Mismatch
E568 (2) Unexpected Left Motor Forward Speed Detected Unexpected Motor