BUSHING 3F6998 - Caterpillar

Use this procedure to troubleshoot high fuel temperature. Use this procedure if one of the following event codes is active.
Table 1
J1939 Code and Description CDL Code and Description Comments
174-0
Engine Fuel Temperature 1 : High - most severe (3) E363 (3)
High Fuel Supply Temperature The fuel temperature is above an acceptable level.
If equipped, the action lamp will illuminate.
The code is logged.
There may be a decrease in power.
174-15
Engine Fuel Temperature 1 : High - least severe (1) E363 (1)
High Fuel Supply Temperature The fuel temperature is above an acceptable level.
If equipped, the action lamp will illuminate.
The code is logged.
174-16
Engine Fuel Temperature 1 : High - moderate severity (2) E363 (2)
High Fuel Supply Temperature The fuel temperature is above an acceptable level.
If equipped, the action lamp will illuminate.
The code is logged.
There may be a decrease in power.
Table 2
Associated Codes
5580-17
5580-18
E1218 Probable Causes
The probable causes of high fuel temperature
Associated codes
Fuel level in the tank
Fuel temperature sensor
Fuel Cooler (if equipped)
Fuel return pressure regulator
Restriction in the fuel lines
Fuel injectorRecommended Actions
Table 3
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Check for active codes and check for logged codes on Cat® Electronic Technician (ET).
B. 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 not active or logged.
Proceed to Test Step 2.
Result: An associated code is active or logged.
Repair: Troubleshoot any active codes before continuing with this procedure.
2. 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.
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 for dirt, debris, or damage, if equipped. 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, if equipped.
Dirt and debris or damage
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 (if equipped). Remove dirt or debris from fuel cooler fins (if equipped). Verify that the problem has been resolved.
If the problem is not resolved, proceed to Test Step 4.
4. Replace the Temperature Sensor
A. Check for active codes or logged codes.
Codes
Result: An E363 or 174 code is active or logged.
Proceed to Test Step 5.
Result: An E363 or 174 code is not active or logged.
Return the unit to service.
5. Replace the Fuel Return Pressure Regulator
Pressure regulator
Result: The problem has been resolved.
Return the unit to service.
Result: The problem has not been resolved.
Proceed to Test Step 6.
6. Perform a Cylinder Cutout Test in Cat ET
Test was not successful
Result: