TUBE ASSEM. 7N2975 - Caterpillar

Which Generate This Code: 3176C and 3196 EnginesThe Electronic Control Module (ECM) detects all of the following conditions:
Coolant temperature is greater than 106 °C (223 °F) for more than four seconds.
The engine has been running more than three minutes. This three minute delay begins once the engine speed is within 50 rpm of low idle. 3406E and 3456 EnginesThe Electronic Control Module (ECM) detects all of the following conditions:
Coolant temperature is greater than 108 °C (226 °F) for more than four seconds.
The engine has been running more than three minutes. This three minute delay begins once the engine speed is within 50 rpm of low idle.System Response:The ECM will log the diagnostic event. The ECM will derate the engine power by 12.5 percent for each degree celsius above the trip point. The maximum derate is 25 percent of full power. The ECM will restore full engine power when the coolant temperature falls 2 °C (3.6 °F) below the trip point for 20 seconds.
Low power
There may be a problem with the cooling system.
There may be a problem with the coolant temperature sensor.Test Step 1. Check for Diagnostic Codes
Connect the Caterpillar Electronic Technician (Cat ET) to the service tool connector.
Turn the keyswitch to the ON position. The engine should be OFF.
Check for any active diagnostic codes or logged diagnostic codes.Expected Result:No diagnostic codes are present.Results:
OK - Proceed to Test Step 2.
Not OK - Repair: Repair the diagnostic codes that are present. Refer to the appropriate topic in the "Troubleshooting With a Diagnostic Code" section of this manual.Ensure that the repair eliminates the problem.STOPTest Step 2. Perform a Check of the Cooling System
Perform a check of the cooling system. Refer to Troubleshooting, "Coolant Temperature is Too High" for possible causes.Expected Result:There are no problems with the cooling system.Results:
OK - There may be an intermittent problem.Repair: Monitor the operation of the engine.Repair the problem.Ensure that the repair eliminates the problem.STOP
Not OK - Repair: Repair the problem.Ensure that the repair eliminates the problem.STOP