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Removing the back of the fan cage provides access to the motor housing.
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            Unplug your fan. 
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            Remove the 20 mm bolt that fastens the fan ring located at the bottom of the fan cage with a Phillips #3 screwdriver. 
 
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            Remove the ring that runs around the edge of the fan cage. 
 
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            Remove the 8 mm bolt fastening the fan blades to the rotor with a Phillip #3 screwdriver. 
 
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            Slide the fan blade off the end of the rotor. 
 
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            Unscrew the four 8 mm bolts that fasten the back of the fan cage back to the motor housing with a Phillips #3 screwdriver. 
 
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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