Troubleshooting

(Table 60, contd)
Troubleshooting Test Steps
Values Results
4. 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 solidi-
fied 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
Systems Operation, Testing, and Adjusting, “Fuel System -
Prime”.
Fuel System Result: A defect was found in the fuel system.
Repair: Make any necessary repairs.
Result: No defects found.
Proceed to Test Step 5.
5. 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 in the conditions that the fault occurred.
Fault cleared Result: The fault has been rectified.
Return the engine to service.
Result: The fault is still present.
Proceed to Test Step 6.
6. Air Inlet and Exhaust System
A. Check the air filter restriction indicator.
B. Ensure that the air filter is clean and serviceable
C. Check the air intake and exhaust systems for the following
defects:
· Blockages
· Restrictions
· Damage to lines or hoses
Defects Result: A defect was found in the air intake or exhaust
system.
Repair: Make any necessary repairs.
Result: No defects found in the air intake or exhaust systems.
Contact the Dealer Solution Network (DSN).
i06228923
Valve Lash Is Excessive
Probable Causes
• Lubrication
• Valve train components
Recommended Actions
Note: The procedures have been listed in order of
probability. Complete the procedures in order.
122 UENR0612-07
Symptom Troubleshooting
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