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VISCOUS FAN CLUTCH OPTION
The viscous fan clutch option allows the engine cooling fan to engage at lower speeds, and disengage at higher
speeds, increasing cooling system efficiency. The cooling fan will engage at full speed when the coolant temperature
rises. When the fan is operating at full speed, it will switch to a slower speed when the coolant temperature drops.
There will be an audible difference when the engine cooling fan switches speeds. Depending on unit model, the
temperature ranges vary 170-200ºF (77-93ºC).
