BUSHING 4F0886 - Caterpillar

Note: High fuel pressure may cause high fuel temperatures. Troubleshoot a code for high fuel pressure before troubleshooting a code for high fuel temperature.Use this procedure in order to troubleshoot high fuel pressure. Use this procedure if one of the following event codes is active.
Table 1
CDL Code and Description Comments
E096 (2)
High Fuel Pressure The code is logged.
The fuel pressure is above the trip point pressure. The probable causes of high fuel pressure
Fuel pressure sensor
Fuel lines
Fuel transfer pump
Fuel return pressure regulator
Table 2
Required Tooling
8t-7860 Connector
110-6349 Fitting as
8t-0855 Pressure Gauge
6v-3990 Coupler
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 diagnostic trouble 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 (3).
C. Install an 8T-7860 Connector into the port of the pressure sensor (3).
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.
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 the Off position, after the sensor is reinstalled.
G. 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
Illustration 2 g02893396
Fuel supply lines
Illustration 3 g02893278
Return fuel line
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.
Illustration 4 g02893398
(5) Return fuel pressure regulator