BEARING ASSEM. 6D4196 - Caterpillar

Use this procedure in order to troubleshoot high fuel temperature. Use this procedure if one of the following event codes is active. Refer to Troubleshooting, "Event Codes" for information about event codes. For information on the engine monitoring system, refer to Troubleshooting, "Engine Monitoring System".Note: Refer to Troubleshooting, "Cat ET Service Features" for information about service features.Probable Causes
Probable causes of high fuel temperature.
Associated codes
Fuel level in the tank
Restriction in the fuel lines
Fuel cooler (if equipped)
Fuel temperature sensor
Fuel return pressure regulator
Fuel injectorRecommended Actions
Complete the procedure in the order in which the steps are listed.
Table 1
Troubleshooting Test Steps    Values    Results    
1. Determine the Code
A. Establish communication between Cat® Electronic Technician (ET) and the Electronic Control Module (ECM) . Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Download the "Warranty Report" from the engine ECM before performing any troubleshooting or clearing diagnostic trouble codes. Check for active codes and check for logged codes on Cat ET.
C. Check Cat ET for any associated codes that are listed in Table 2. Troubleshoot any active codes before continuing with this procedure.
   
Codes    
Result: An associated code is active or logged.
Repair: Troubleshoot any active codes before continuing with this procedure.
Result: An associated code is not active or logged.
Proceed to Test Step 2.
   
Table 2
Associated Diagnostic Trouble Codes    
J1939 Code     CDL Code    
94     E1218    
5580     E198    
Table 3
Troubleshooting Test Steps    Values    Results    
2. Check the Fuel Level in the Fuel Tank
A. Check the fuel level in the fuel tank.
   
Fuel Level    
Result: The fuel level is acceptable.
Proceed to Test Step 3.
Result: The fuel level is not acceptable.
Repair: Fill the tank. Verify that the problem has been resolved.
If the problem has not been resolved, proceed to Test Step 3.
   
Illustration 1 g02041759
Fuel supply lines for inspection
Illustration 2 g02163246
Cooling line from fuel high-pressure pump to injectors
Illustration 3 g02041781
Fuel return line to be inspected
Table 4
Troubleshooting Test Steps    Values    Results    
3. Inspect the Fuel Supply Lines
A. Visually inspect the fuel lines between the priming pump and the inlet to the cylinder head. Also, inspect the fuel cooler (if equipped) for dirt, debris, or damage. Inspect the fuel return line from the head to the fuel tank. Inspect the lines for restrictions, pinching, and swelling. Refer to Systems Operation/Testing and Adjusting, "Fuel System - Inspect" for additional information.
B. Inspect the fuel cooler for dirt, debris, or damage.
   
Fuel Supply Lines    
Result: The fuel lines and the cooler (if equipped) are OK.
Proceed to Test Step 4.
Result: The fuel lines and the cooler (if equipped) are not OK.
Repair: Replace damaged fuel lines and/or fuel cooler. Remove dirt or debris from fuel cooler fins. Verify that the problem has been resolved.
If the problem has not been resolved, proceed to Test Step 4.
   
Illustration 4 g02338019
Fuel cooler
Illustration 5 g03764302
(1) Fuel temperature sensor
Table 5
Troubleshooting Test Steps    Values    Results    
4. Replace the Temperature Sensor
A. Replace fuel temperature sensor (1) .
B. Check for active codes or logged codes.
   
Fuel Temperature