Troubleshooting

(Table 11, contd)
Troubleshooting Test Steps
Values Results
6. Water Temperature Regulator
A. Check the water temperature regulator for correct operation.
Refer to Systems Operation, Testing, and Adjusting, “Cooling Sys-
tem” for the proper procedure.
Water Temper-
ature Regulator
Result: The water temperature regulator is not operating
correctly.
Repair: Replace the water temperature regulator. Refer
to Disassembly and Assembly, “Water Temperature Regu-
lator - Remove and Install”.
Result: The water temperature regulator is operating
correctly.
Proceed to Test Step 7.
7. Engine Cooling Fan
A. Check for a loose drive belt.
Note: A loose fan drive belt will cause a reduction in the air flow
across the radiator.
B. Check the engine cooling fan for damage.
Fan and drive
belt
Result: The drive belt is not tensioned correctly.
Repair: Tension the fan belt. Refer to Operation and
Maintenance Manual, “Alternator and Fan Belts -
Replace”.
Result: The fan is damaged.
Repair: Repair the fan or replace the fan, as necessary.
Refer to Disassembly and Assembly, “Fan - Remove and
Install”.
Result: The fan is OK and the fan belt is tensioned
correctly.
Proceed to Test Step 8.
8. Quality of Coolant
A. Check the quality of the coolant. Refer to the Operation and
Maintenance Manual, “Refill Capacities and Recommendations -
Coolant”.
Coolant Result: The coolant is not of an acceptable quality.
Repair: Drain and refill the coolant system with coolant of
the correct quality. Refer to the Operation and Mainte-
nance Manual, “Refill Capacities and Recommendations -
Coolant”.
Result: The coolant is of an acceptable quality.
Proceed to Test Step 9.
(continued)
UENR0612-07 41
Symptom Troubleshooting
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