Troubleshooting

(Table 6, contd)
Troubleshooting Test Steps Values Results
7. Turbocharger
Note: The turbocharger that is installed on the engine is a non-
serviceable item. If any mechanical fault exists, then the faulty
turbocharger must be replaced.
A. Ensure that the mounting bolts for the turbocharger are tight.
B. Check that the oil drain for the turbocharger is not blocked or
restricted.
C. Check that the compressor housing for the turbocharger is free
of dirt and debris. Make sure that the housing is not damaged.
D. Check that the turbine housing for the turbocharger is free of
dirt and debris. Make sure that the housing is not damaged.
E. Check that the turbine blades rotate freely in the turbocharger.
F. Ensure that the wastegate on the turbocharger is adjusted cor-
rectly. Refer to Systems Operation, Testing, and Adjusting, “Tur-
bocharger - Inspect”. If the wastegate actuator is faulty, replace
the turbocharger. Refer to Disassembly and Assembly, “Turbo-
charger - Remove” and Disassembly and Assembly, “Turbocharg-
er - Install”.
Turbocharger Result: There is a fault on the turbocharger.
Repair: Repair the turbocharger or replace the turbo-
charger. Refer to Disassembly and Assembly, “Turbo-
charger - Remove” and Disassembly and Assembly,
“Turbocharger - Install”.
Result: The turbocharger is OK.
Proceed to Test Step 8.
8. Fuel Supply
A. Visually check the fuel level in the fuel tank. Do not rely on the
fuel gauge only.
B. Ensure that the vent in the fuel cap is not filled with debris.
C. Ensure that the fuel supply valve (if equipped) is in the full
OPEN position.
D. If the temperature is below 0 °C (32 °F), check for solidified
fuel (wax).
E. Check the primary filter/water separator for water in the fuel.
F. Check for fuel supply lines that are restricted.
G. Check that the low-pressure fuel lines are tight and secured
properly.
H. Replace the primary and secondary fuel filters.
I. Check the diesel fuel for contamination. Refer to Systems Oper-
ation, Testing, and Adjusting, “Fuel Quality - Test”.
J. Check for air in the fuel system. Refer to Systems Operation,
Testing, and Adjusting, “Air in Fuel - Test”.
K. Ensure that the fuel system has been primed. Refer to Sys-
tems Operation, Testing, and Adjusting, “Fuel System - Prime”.
Fuel system Result: The fuel supply is not OK.
Repair: Repair the fuel system or replace the fuel system
components, as necessary.
Result: The fuel supply is OK.
Proceed to Test Step 9.
(continued)
UENR0612-07 33
Symptom Troubleshooting
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