Introduction
If the shell of your Ryobi P501G is damaged or compromised, you might want to think about replacing it. A damaged shell might be the result of wear and tear, or overuse. The opening up is not too complex and does not require a lot of experience. You will need the indicated screwdrivers to accomplish the task. There are no warnings or potential hazards when replacing this part.
Tools
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            Locate the area where the blade is connected to the motor, where the circular covering is on the Ryobi P501G. 
 
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            Unscrew clockwise and remove the bearing in the middle, connecting the blade to the motor. This will also allow removal of the blade guard. 
 
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            Once the black bearing is off, remove the transparent cover of the blade. 
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            Once the cover is off, remove the blade. 
 
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            Remove the three screws on the inside base of the metal casing of the blade. 
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            Pull the metal blade casing off of the Ryobi P501G body. 
 
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            Remove all of the screws located on the right side of the saw. 
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            Separate the right side of the saw from the left side by pulling away once all of the screws are removed. 
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            Pull back the shell to access the housed parts underneath. 
 
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To reassemble your device, follow these instructions in reverse order.