Introduction
This guide will show you how to remove the back wheels and axle of a Sanitaire SC684 Vacuum and replace them. For this you will need a replacement back wheel and axle part for a Sanitaire SC684. The wheels come attached with the axle and are removed and replaced together.
Tools
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            Lay the vacuum on its side. 
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            Remove the two screws with the Phillips #1 screwdriver that are securing the axle of the back wheels. 
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            Repeat for the other wheel. 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.