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If your Ridgid R175RNE nailer is firing sluggishly or not at all, then either the driver cylinder or driving blade O-rings may be worn out. Follow this guide to replace the driver cylinder O-rings.
The driver cylinder O-rings are what allows the cylinder to smoothly slide back and forth after the driving blade is fired.
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Use a 5/32" Allen wrench to remove the four 25 mm screws that secure the top cap.
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Remove the top cap.
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Remove the driver cylinder and place the nailer body to the side.
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Take your o-ring pick or flathead and gently slide the tip under the O-ring.
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Repeat with other four O-rings starting, from top to bottom.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.