SEAL-O-RING 4M6582 - Caterpillar

Use this procedure in order to troubleshoot a low fuel pressure, 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 Code    
Description    Default Conditions which Generate this Code    System Response    
E053(1) Low Fuel Pressure Warning     The fuel pressure drops below the trip point for the specified delay time.     The code is logged.    Probable Causes
Fuel level
Fuel tank cap
Diagnostic codes and event codes
Fuel pressure sensors
Fuel pressure regulating valve
Fuel priming pump (if equipped)
Fuel transfer pumpRecommended Actions
Table 2
Troubleshooting Test Steps     Values     Results    
1. Fuel Level
A. Visually inspect the fuel level in the fuel tank. Ensure that the fuel tank contains enough fuel in order to operate the engine.    
Fuel level    
Result: The fuel level is OK.
Proceed to Test Step 2.
Result: The fuel level is NOT OK.
Add fuel, as necessary.    
2. Fuel Tank Cap
A. Remove the fuel tank cap from the fuel tank. Check the vent port that is in the cap for debris.
Do not allow debris to enter the fuel tank while the cap is cleaned. Clear any restrictions with compressed air.    
Fuel tank cap    
Result: The vent port for the fuel tank cap is OK.
Proceed to Test Step 3.
Result: The vent port for the fuel tank cap is NOT OK.
Clean the vent port. Verify that the problem is resolved.
   
3. Diagnostic Codes and Event Codes
A. Establish communication with Cat ET. Refer to Troubleshooting, "Electronic Service Tools" for more information.
B. Check for active diagnostic codes and event codes.    
Codes    
Result: There are active codes present.
Troubleshoot any active diagnostic codes before continuing with the procedure.
Result: There are no active codes present.
Proceed to Test Step 4.    
4. Fuel Pressure Sensor
Use the following in order to check the fuel pressure sensor parameters:
1. Start the engine.
2. Run the engine at low idle.
3. Use Cat ET in order to monitor the fuel pressure for the engine.    
Sensor    
Result: The value of the parameter at low idle is reasonable.
Result: The value of the parameter at low idle is NOT reasonable.
   
5. Fuel Pressure Regulating Valve
A. Inspect the fuel pressure regulating valve for contamination or debris that is lodged between the valve and the valve seat.
B. Inspect the fuel pressure regulating valve for wear and damage.    
   
Result: The fuel pressure regulating valve contains contamination or debris.
Find the source of contamination, and clean contamination or debris that can keep the regulating valve open.
Result: The fuel pressure regulating valve does NOT contain contamination or debris.
Result: The fuel pressure regulating valve is worn or damaged.
Make the necessary repairs to the fuel pressure regulating valve. Verify that the problem is resolved.
Result: The fuel pressure regulating valve is NOT worn or damaged.
Proceed to Test