Warning: The fan will engage when the engine is started.
To avoid personal injury, do not put your hands in the
path of the rotating fan.
Caution: Do not exceed 100°C [212°F] (104°C [220°F]
for the N14-460E) coolant temperature. Higher coolant
temperatures can damage the engine.
When the coolant temperature reaches 91°C [195°F],
measured fan speed must reach a minimum of 85 per-
cent of a pulley speed.
The measured fan speed divided by the measured fan
hub (pulley) speed. Must be greater than or equal to 0.85.
Measured Fan Speed
≥ 0.85
Fan Hub (Pulley) Speed
While the engine is still at high idle, remove the radiator
grill cover. The fan speed must begin to decrease after
one (1) minute and eventually drop to a maximum of 50
percent of the input pulley speed.
If the viscous fan hub fails this test, have it checked by
an authorized fan hub dealer for repair or replacement.
If the fan does not operate within the temperature range
indicated in the Thermal Control Settings Chart shown in
the front of this section, the fan clutch and the controls
must be checked. Refer to the fan clutch manufacturer’s
service manual.
Section 1 - Cooling System Viscous Fan Clutch (1-23)
N14 Page 1-49
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