How to Repair a Nail Gun

The nail gun will misfire if the piston is not regularly lubricated. Unscrew the air line connector from the bottom of the nail gun with your fingers. Remove the air line hose from the nail gun. Turn the nail gun over and drip 10 drops of air tool lubricant into the air line hose hole. Place the air line hose back on the hole and screw the air line connector clockwise. Screw the valve on the air compressor three turns clockwise. Aim the barrel of the nail gun off in the distance. Fire off the trigger of the nail gun six to eight times to lubricate the piston.

Vibrations from firing the nails can loosen the screws surrounding the tip of the barrel and impair the nail gun's ability fire to fire a nail in a straight line. Unscrew the connector from the air hose line. Remove the air hose from inside the connector. Hold the nail gun with the barrel facing straight up. Insert a hex tool in one of the screws surrounding the nose at the end of the barrel. Tighten the screw clockwise with the hex tool. Repeat this procedure on the other screws surrounding the nose. Reattach the air line hose to the nail gun and tighten the air line connector.

To keep nails from sticking inside the magazine, first unscrew the air line connector from the bottom of the nail gun and remove the air line hose. Press down on the locking latch by the side of the trigger. Lower the magazine from inside the nail gun. Empty any nails in the magazine into your palm. Pull out any nails in the open compartment directly above the magazine --- you may need a set of needle-nose pliers to pull out a stuck nail by the head. Apply air tool lubricant on the clean edge of a soft cloth. Wipe the edge of the cloth on the edges of the magazine, inside the magazine and around the edges of the open compartment. Place the nails back in the magazine. Close the magazine back in the nail gun. Pull up on the locking latch to reengage it. Reattach the air line house, and screw the air line connector clockwise.