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The Fan Clutch is a component of the cooling system that varies the fan speed to meet the cooling needs of the engine. Nearly all rear wheel drive vehicles use Fan Clutches to control fan speed because of their ability to provide high volumes of air and good fuel economy. The air temperature coming through the radiator is sensed by the bi-metal thermal spring on the front of the thermal fan clutch. It expands and contracts with the change in air temperature operating a valve inside of the clutch. Most models are designed to duplicate original equipment performance. Some Chevrolet/GMC truck models are specifically designed to engage at lower temperatures than the original equipment parts that they replace. Thermal Fan Clutch Design Types We make four different types of thermal fan clutches; Standard, Heavy Duty, Severe Duty and Truck Fan Drives. Each type is engineered to simulate the performance, fit and appearance of the original equipment clutch that it replaces. Fan Clutch Trouble Shooting : Faulty fan clutches can be detected by checking for obvious indications of failure such as : Leaking fluid - oily build up around the bearing or thermal spring. Bad bearing - seized, turns rough or has excessive play (more than 1/4” at fan tip). Worn thermal spring - spring is loose. Some fan clutches will show no visible indication of a problem yet may still be faulty. The following may also indicate a faulty fan clutch. Other Cooling Systems Problems Affecting Fan Clutch Operation. Symptoms of Radiator Problems, MUSTANG, MUSTANG II. EXPLORER, EXPLORER SPORT, EXPLORER SPORT TRAC.
Tags : explorer sport trac, wheel drive vehicles, fan clutches, clutch design, radiator problems, fan clutch, chevrolet gmc, mustang ii, thermal fan, thermal spring, gmc truck, visible indication, truck models, rear wheel drive, fuel economy
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