(Table 32, contd)
Troubleshooting Test Steps Values Results
6. Fuel System Inspection
A. Check that the fuel shut-off valve is in the OPEN position.
B. If the temperature is below 0 °C (32 °F), check for solidified
fuel (wax).
C. Check for fuel supply lines that are restricted.
D. Check that the low-pressure fuel lines are correctly
installed.
E. Check the pressures in the fuel system. Refer to Systems
Operation, Testing, and Adjusting, “Fuel System Pressure -
Test”
F. Check the diesel fuel for contamination. Refer to Systems
Operation, Testing, and Adjusting, “Fuel Quality - Test”.
G. Check for air in the fuel system. Refer to Systems Opera-
tion, Testing, and Adjusting, “Air in Fuel - Test”.
H. Ensure that the fuel system has been primed. Refer to Sys-
tems Operation, Testing, and Adjusting, “Fuel System -
Prime”.
Fuel System Result: A defect was found in the fuel system.
Make any necessary repairs.
Result: No defects found.
Proceed to Test Step 7.
7. Fuel Filters
A. Replace the primary fuel filter and the secondary fuel filter.
Refer to the Operation and Maintenance Manual, “Fuel Sys-
tem Primary Filter (Water Separator) Element - Replace”.
B. Run the engine at top speed.
Top speed Result: The engine reaches top speed.
Return the engine to service.
Result: The engine does not reach top speed.
Proceed to Test Step 8.
(continued)
76 UENR0612
Symptom Troubleshooting
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