Forum Discussion
Griff_in_Fairba
Mar 06, 2018Explorer III
Fan clutches are overrunning clutches, sometimes called 'sprag clutches.' When airflow causes the fan blades to try to spin faster than the fan pulley, the clutch disengages. Otherwise, the engaged fan blades tries to overdrive the water pump and creates stress on the fan belt.
Note: Overrunning is different from freewheeling.
Note: Overrunning is different from freewheeling.
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