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The oscillation arm controls the back and forth motion of the fan. A broken or compromised oscillation arm will inhibit the fan oscillation function.
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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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            Unscrew the 10 mm screw in the center hole of the oscillation knob with a Phillips #3 screwdriver. 
 
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            Use your fingers to gently pull the power knob directly away from the motor housing. 
 
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            Unscrew the flat 17 mm nut fastened at the bottom of the power knob with a small crescent wrench. 
 
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            Remove the four 6 mm bolts and small washers that secure the front face of the motor housing with a Phillips #3 screwdriver and remove the washers. 
 
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            Pull the front face of the motor housing off toward the front of the rotor. 
 
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            Remove the 10 mm triangular-headed bolt with a Phillips #3 screwdriver. 
 
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            Slide the back end of the motor housing away from the front of the rotor. 
 
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            Remove the small piece of paper hanging on the power button. 
 
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            Using a Phillips #3 screwdriver, unscrew the the 16 mm long screw fastening the oscillation arm to the lower oscillation gear screw. 
 
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            Using a Phillips #3 screwdriver, unscrew and remove the 4 mm long bolt on the front face of the base that fastens the motor assembly to the base bolt. 
 
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            Remove the fan motor assembly from the base. 
 
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            Using a Phillips #3 screwdriver, unscrew the 15 mm long bolt fastening the oscillation arm to the fan base bolt. 
 
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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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