85549 Mercury "O" RING, BEARING CARRIER

Table 1
J1939 Code and Description CDL Code and Description Comments
5580-16
Engine Filtered Fuel Delivery Absolute Pressure : High - moderate severity (2) E096 (2)
High Fuel Pressure The code is logged.
The fuel pressure is above the trip point pressure. Probable Causes
The probable causes of high fuel pressure
Fuel pressure sensor
Fuel lines
Fuel transfer pump
Fuel return pressure regulatorRequired Tooling
Table 2
Required Tooling
8t-7860 Connector
110-6349 Fitting as
8t-0855 Pressure Gauge
6v-3990 Coupler Recommended Actions
Table 3
Troubleshooting Test Steps Values Results
1. Determine the Code
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Determine if a code is present.
Diagnostic trouble code
Result: A E096 (2) or 5580-16 code is present.
Proceed to Test Step 2.
Result: A code other than E096 (2) or 5580-16 code is present.
Repair: Troubleshoot the code. Refer to the proper troubleshooting procedure.
Illustration 1 g02893220
(1) Fuel temperature sensor
(2) Fuel sampling port
(3) Fuel pressure sensor
(4) Secondary fuel filter baseNote: Do not use the fuel sampling port (2) for measuring the pressure.
Table 4
Troubleshooting Test Steps Values Results
2. Check the Fuel Pressure Sensor
A. Record the fuel pressure from Cat ET. Record the data in Table 5.
B. Remove the fuel pressure sensor.
C. Install an 8T-7860 Connector into the port of the pressure sensor.
D. Install the 110-6349 Fitting as onto the 8T-7860 Connector.
E. Install a 8T-0855 Pressure Gauge onto a 6V-3990 Coupler.
F. Install the 6V-3990 Coupler onto the 110-6349 Fitting as.
G. After the pressure sensor is removed, a code for low fuel pressure will become active. Reset all active codes and clear all logged codes by cycling the keyswitch to Off, after the sensor is reinstalled.
H. Record the fuel pressure on the pressure gauge. Record the data in Table 5.
Fuel pressure sensor
Result: The gauge value of the fuel pressure is within 137 kPa (20 psi) of the fuel pressure reading shown in Cat ET.
Proceed to Test Step 3.
Result: The gauge value of the fuel pressure is not within 137 kPa (20 psi) of the fuel pressure reading shown in Cat ET.
Repair: Replace the pressure sensor.
If the problem is not resolved, proceed to Test Step 3.
Table 5
Engine RPM Fuel pressure from Cat ET Fuel pressure from the mechanical gauge
800
1800
Table 6
Troubleshooting Test Steps Values Results
3. Inspect the Fuel Supply Lines
A. Visually inspect the following components:
- Fuel lines between the primary filter base and the inlet to the cylinder head
- Fuel cooler (if equipped)
- Fuel return line from the head to the fuel tank
- Fuel lines for restrictions, pinching, and swelling
Fuel Lines
Result: The fuel lines and the cooler are OK.
Proceed to Test Step 4.
Result: The fuel lines and the cooler are not OK.
Repair: Make the necessary repairs.
If the problem is not resolved, proceed to Test Step 4.
4. Replace the Return Fuel Pressure Regulator
Fuel pressure regulator
Result: The regulator was replaced.
If the problem is not resolved, proceed to Test Step 5.
5. Inspect the Relief Valve for the Fuel Transfer Pump
Note: The spring must move freely.
Relief valve
Result: The relief valve is stuck closed.
Repair: Replace the fuel transfer pump. Verify that the problem has been resolved.
Result: The relief valve is OK.
Repair: Clean the relief valve and reinstall the relief valve. Verify that the problem has been resolved.
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).