Introduction
Make sure you don't lose any screws! This guide has you unscrewing in a lot of spots so be careful!
Tools
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            Pull up on the silver handle to release the top protectant plastic 
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            Remove the top plastic carefully 
 
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            Remove the ten 11mm screws that hold the front bumper to the plastic bumper protector with your Phillips #1 screwdriver. 
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            Pull the plastic bumper protector up and off of the bumper. 
 
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            Flip the Roomba back over, so you are viewing the top. 
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            Pull up on the front bumper to remove it. 
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            Remove the two 7mm screws with your Phillips #1 screwdriver, holding the wire sensors in place to the front bumper. 
 
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            The outside six - 10mm screws and the inside set of four - 10mm screws are the same here, use your Phillips head #2 to remove them 
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            Use your Phillips head #0 to remove the one - 7mm bottom center screw 
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            Use your Phillips head #2 to remove the two - 8mm screws by the handle 
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            Push down the two release points to pull the plastic piece up 
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            Pull the plastic piece up 
 
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To reassemble your device, follow these instructions in reverse order.