Introduction
This guide shows how to remove or replace the solenoid assembly in a Dewalt DCN21PL Nailer.
What you need
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Use a T10 driver to remove the four screws securing the bottom half of the casing.
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Remove the four T10 screws securing the top half of the casing.
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Use a T10 driver to remove the screw securing the magazine to the base.
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Use a T15 driver to remove the framing hook retaining screw.
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Remove the hook.
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Use your two thumbs to firmly spread the metal hook clamp apart while slowly pushing it forward off the handle.
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Use the provided 3.5 mm hex key to remove the two return system bolts on either side of the nailer.
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Once loose, lift up to remove the right half of the clamshell case.
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Grasp either side of the main circuit board and slowly pull it up and out of the slot in the casing.
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Carefully use a pick tool to release the black and red wires from their routing guide on the nailer.
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Insert the point of a pick tool into the push-in connector's inlet hole, which has the solenoid wire plugged into it.
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With the pick tool still inserted, pull the red solenoid wire out of the push-in connector.
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Repeat this same process for the black wire and other push-in connector.
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Fully remove both wires from the wire guide.
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Pull out and up on the plastic wire guide to disconnect it from its clips.
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Detach and remove the wire guide.
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Pull directly back on the solenoid to remove it from the mount. You may have to "walk" the solenoid back and forth to slowly loosen it from the slots holding it in place.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.