Introduction
This is an easy guide. It should only take a few minutes to complete. It doesn't require any tools.
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            Use your index fingers to pull the yellow tabs towards you. 
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            While still pulling the yellow tabs with your index fingers, tilt up the brush guard. 
 
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            Pull back the brush guard to unhook it from the latches. 
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            Remove the brush guard by lifting it up and out of the Roomba. 
 
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            Remove the flexible rubber brush by grabbing it and pulling it up and out of the Roomba. 
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            First, insert the black end of the flexible rubber brush into the black square opening on the right side. 
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            Second, lay the flexible rubber brush back into place. 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.