SHAFT AS 7G7655 - Caterpillar

Use this procedure in order to troubleshoot low coolant level or use this procedure if one of the following event codes is active. Refer to Troubleshooting, "Event Code List" for information about event codes and the default trip points for these codes. You must access the monitoring system on Caterpillar Electronic Technician (ET) in order to view the current trip points for these codes.
Table 1
Event or Diagnostic Code    
Code and Description     Conditions which Generate this Code     System Response    
E058(3) Low Engine Coolant Level Shutdown     The engine coolant level has fallen below the coolant level sensor for the specified delay time.     The code is logged.
The engine will be shutdown after 10 seconds.    
E059(1) LowEngine Coolant Level Warning     The engine coolant level has fallen below the coolant level sensor for the specified delay time.     The code is logged.    
111-1 Low Coolant Level Warning     The engine coolant level has fallen below the coolant level sensor for the specified delay time.     The code is logged.
The diagnostic lamp will flash.
The alarm lamp will illuminate.    
111-11 Very Low Coolant Level (Derate)     The engine coolant level has fallen below the coolant level sensor for the specified delay time.     The code is logged.
The diagnostic lamp will flash.
The alarm lamp will flash.
The engine will be derated 10 seconds after the "Warning".    
111-11 Very Low Coolant Level (Shutdown)     The engine coolant level has fallen below the coolant level sensor for the specified delay time.     The code is logged.
The engine will be shutdown after 30 seconds.    Probable Causes
Low coolant level and/or coolant leakage
Coolant level sensorRecommended Actions
Low Coolant Level and/or Coolant Leakage
Personal injury can result from hot coolant, steam and alkali.At operating temperature, engine coolant is hot and under pressure. The radiator and all lines to heaters or the engine contain hot coolant or steam. Any contact can cause severe burns.Remove filler cap slowly to relieve pressure only when engine is stopped and radiator cap is cool enough to touch with your bare hand.Cooling System Conditioner contains alkali. Avoid contact with skin and eyes.
Inspect the coolant level. If necessary, add coolant.
Check for the correct mixture of antifreeze and water. Refer to Operation and Maintenance Manual.
Check the cooling system for leaks. Repair any leaks immediately.
Check for air in the cooling system. Refer to Systems Operation/Testing and Adjusting for the correct procedure.Coolant Level Sensor
If an electrical problem with the coolant level sensor is suspected, refer to Troubleshooting, "Coolant Level - Test" for information that is related to troubleshooting an electrical problem with the coolant level sensor.