LINK (Master-Left Hand) 4K7042 - Caterpillar

Illustration 1 g03779528
C9.3 Engines (1) Fuel temperature sensor (2) Unfiltered fuel pressure sensor (3) Fuel pressure sensor (4) Fuel filter baseNote: Do not use location (2) for measuring the fuel pressure. Follow the steps below.
Illustration 2 g03779532
C13 - C18 Engines (5) Fuel temperature sensor (6) Fuel sampling port (7) Fuel pressure sensor (8) Fuel filter baseNote: Do not use location (6) for measuring the fuel pressure. Follow the steps below.
Table 5
Troubleshooting Test Steps    Values    Results    
4. Check the Fuel Pressure Sensor
A. Record the fuel pressure from Cat ET. Record the value in Table 6.
B. Remove the fuel pressure sensor .
C. Install a 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. Record the fuel pressure from Cat ET and on the pressure gauge. Record the data in Table 6.
   
Pressure Sensor    
Result: The gauge value of the fuel pressure is within 69 kPa (10 psi) of the fuel pressure reading shown in ET.
Proceed to Test Step 5.
Result: The gauge value of the fuel pressure is not within
69 kPa (10 psi) of the fuel pressure reading shown in ET.
Repair: Replace the pressure sensor. Verify that the problem has been resolved.
If the problem is not resolved, proceed to Test Step 5.
   
Table 6
Engine RPM     Fuel pressure from Cat ET     Fuel pressure from the mechanical gauge    
800            
1800            
Table 7
Troubleshooting Test Steps    Values    Results    
5. Replace the Fuel Filters
A. Replace the primary filter, the secondary filter, and the tertiary fuel filters.
The fuel system will need to be primed after the filters are replaced.
B. Reset all active codes by cycling the keyswitch to the Off position for 2 minutes.
   
Fuel Filters    
Result: The problem has been resolved.
Return the engine to service.
Result: The problem has not been resolved.
Proceed to Test Step 6.
   
6. Check for Air in the Fuel System
A. Check for air in the fuel. Refer to Systems Operation/Testing and Adjusting, "Air in Fuel - Test" for the proper procedure
   
Air in the System    
Result: Air is in the system.
Repair: Refer to Systems Operation/Testing and Adjusting, "Air in Fuel - Test" for the proper repairs.
Result: Air is not in the system.
Proceed to Test Step 7.
   
Illustration 3 g03429826
C9.3 Engines (9) Anti-drain check valve (10) Fuel return pressure regulator
Illustration 4 g03779537
C13 - C18 Engines (11) Anti-drain check valve (12) Fuel return pressure regulator
Table 8
Troubleshooting Test Steps    Values    Results    
7. Replace the Fuel Return Pressure Regulator
A. Replace the fuel return pressure regulator.
B. Inspect the anti-drain check valve for proper operation.
   
Pressure Regulator    
Result: The problem has been resolved
Return the engine to service.
STOP
Result: The problem has not been resolved.
Proceed to Test Step 8.
   
8. Replace the Transfer Pump
A. Replace the transfer pump.
For information about testing the transfer pump, Refer to Testing and