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ISM, ISMe, and QSM11 – 008-025   Fan Clutch, Air-Engaged

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This type of fan clutch is engaged by air pressure and is disengaged by spring tension.

Air pressure of 620 to 830 kPa [90 to 120 psi] is required to override the clutch spring tension to engage the fan.

  
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If the fan does not operate within the temperature range indicated on the coolant temperature sensor (1), the fan clutch and the controls must be checked. Refer to the OEM service manual.

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Last Modified:  23-Jan-2009
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