When the coolant temperature drops to approximately
6°C [10°F] below the temperature stamped on the con-
trol, the shutters will be fully closed.
If the shutters do not operate correctly, refer to the shut-
ter manufacturer’s service manual.
Checking - Intake Air Temperature Actuation
Begin test with the engine cold. Any stabilized coolant
temperature at 60°C [140°F] or below.
Install the engine onto the engine or chassis dynamom-
eter. Refer to Section 8, Engine Testing.
Install a Fluke digital thermometer, Part No. 3822666,
and attach thermocouple wire kit, Part No. 3822988, into
the intake manifold.
Section 1 - Cooling System Radiator Shutter Operation (1-17)
N14 Page 1-39
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