Introduction
Tools
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            Place an opening tool in the groove line of the handle and pop the back loose. 
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            Grab the drill with two hands and pull the cover off. 
 
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            Firmly grab the body of the trigger. 
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            Slowly pull the trigger until the entire body is out and only attached by wires. 
 
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            With a pair of blunt nose tweezers, grab the white wire. 
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            Carefully wiggle the wire loose. 
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            Pull the wire slowly until it comes out. 
 
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            Use an opening tool to lift up the spring holding down the brush. 
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            Remove the brush from its holding. 
 
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            Grab the gear case cover and gently pull it out just enough to where it exposes the lever assembly. 
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            The lever assembly can now be lifted out. 
 
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            Hold the hammer drill tool firmly by the handle. 
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            Gently separate the gear case unit from the hammer drill body. 
 
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To reassemble your device, follow these instructions in reverse order.