Air Supply Problem
Check the compressor to ensure it is turned on. Pull the release valve to discharge the pressure and restart the compressor. Allow it to fill until it stops and test the nailer again. If this fixes the problem, return to normal use, if not, continue.
Disconnect the air hose before beginning troubleshooting. Pull the feeder shoe toward the bottom of the nailer along the magazine until it locks in place. Make sure there are nails in the magazine.
Inspect the top of the magazine for jammed fasteners. Unsnap the latch on top of the nailer and fold it open. Remove jammed fasteners with a small screwdriver, then close the top.
Push the fasteners up to the top of the clip and release the feeder shoe so the spring carries it up against the fasteners.
Apply three drops of tool oil into the air intake at the bottom of the nailer handle. Reattach the air hose and resume normal use. If the problem persists, see a professional tool service for repairs.
Fasteners not Seating Fully
Disconnect the air hose. Inspect the magazine as outlined above. Make sure the fasteners are set with their points at the front of the clip, and adjust if needed.
Check the compressor to make sure it is set at the correct air pressure. Adjust the pressure gauge as needed for optimum operation.
Tighten the screws holding the back vent cover on the nail gun at the top rear of the handle. Use an Allen wrench to turn them clockwise to tighten.
Reattach the air hose, start the compressor and allow it to charge fully. Test the gun, and if the problem persists seek professional servicing.