(Table 88, contd)
Troubleshooting Test Steps
Values Results
6. Cooling System
A. Check for an internal coolant leak into the cylinder and/or the
exhaust. Refer to Systems Operation/Testing and Adjusting,
“Cooling System”.
Internal coolant
leak
Result: There is an internal coolant leak.
Repair: Make the necessary repairs. Verify that the re-
pair eliminated the fault.
Result: There is not an internal coolant leak.
Proceed to Test Step 7.
7. Fuel Quality
A. Check the fuel quality. Refer to Systems Operation, Testing,
and Adjusting, “Fuel Quality - Test”.
B. Refer to Operation and Maintenance Manual for information on
the proper characteristics of the fuel for the engine.
Fuel Result: The fuel quality is not OK.
Repair: Drain the fuel system and replace the fuel fil-
ters. Refer to the Operation and Maintenance Manual,
“Fuel System Primary Filter (Water Separator) Element
- Replace” and Operation and Maintenance Manual,
“Fuel System Filter - Replace”.
Fill the fuel system with fuel that meets the standard in
the Operation and Maintenance Manual, “Fluid
Recommendations”.
Prime the fuel system. Refer to the Operation and
Maintenance Manual, “Fuel System - Prime”.
Proceed to Test Step 12.
Result: The fuel quality is OK.
Proceed to Test Step 8.
8. Valve Lash
Note: The valve lash can affect the performance of the engine.
A. Check the valve lash.
Valve lash Result: The valve lash is not set correctly.
Repair: Check the valve lash. Refer to Systems Opera-
tion, Testing, and Adjusting, “Engine Valve Lash - In-
spect” for the correct procedure.
Proceed to Test Step 12.
Result: The valve lash is correct.
Proceed to Test Step 9.
(continued)
UENR4469-36 177
Symptom Troubleshooting
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