
Porter Cable is a well-known brand of medium-priced professional woodworking tools. Their nail guns are widely used, and like any power tool, they sometimes need troubleshooting. One common issue is a nail jam, which can be caused by nails crumpling and jamming the plunger. To fix this, you need to release the tension on the nail clip, open the top of the gun, and remove the jammed nails with pliers or a screwdriver. It's also important to oil the gun after completing the repair. If you're having issues with air supply, you should check the power on the compressor and release the pressure from the tank. Always remember to prioritise safety when troubleshooting any nail gun.
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What You'll Learn

Loosen Allen screws to remove jammed nails
Loosen the Allen screws to remove jammed nails from your Porter Cable nail gun. The first step is to turn off the power source. If you have a cordless nail gun, remove the battery. Next, remove the fasteners to prevent injury in case a nail flies out suddenly.
Now, locate the two Allen screws near the nose of the gun. Loosen these screws with an Allen wrench. This will grant you access to the jammed nail. You may need to use a screwdriver or needle-nose pliers to remove the nail. Be careful not to use your hands, as this could lead to injury.
Once the nail is removed, push the driver blade down to ensure it is in the reset position. You can use a screwdriver or a hammer and nail for this step if the jam is tight. Finally, reassemble the nail gun, ensuring all screws are tightened, and reconnect the power source or battery.
It is important to oil your nail gun regularly to prevent jamming. Additionally, always test fire a few nails after clearing a jam to ensure there are no remaining fragments.
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Release air pressure from the nail gun
To release air pressure from a nail gun, follow these steps:
First, locate the end of the air hose where it connects to the nail gun. You should see a brass ring on the connector. Pull back on this ring to detach the air hose from the gun. Be cautious, as the air hose will release a burst of air when detached. If the air hose does not detach easily, something may be obstructing the airflow and will need to be addressed.
Next, find the release valve, typically a red or yellow plastic-shrouded valve located near the pressure gauge. Pull out on this valve to release the pressure from the tank. Continue releasing pressure until the compressor kicks in and begins to recharge. Monitor the pressure gauge to ensure it reaches the appropriate level, which is typically between 125 and 150 psi.
Now, open the top of the nail gun by releasing the flip latch located on the top. Pull it forward to release the top plate, which will rock up and back toward the handle, exposing the plunger slide. Check the nail clip to ensure it is not stuck and that nails are present. If necessary, reload the clip with nails, ensuring they are flat and facing the front of the gun.
Finally, close the top of the gun by pushing down the top plate and securing it with the flip latch. Connect the air hose back to the gun, ensuring a tight connection. The nail gun should now be ready to use, but always test it on a few nails before proceeding with your project.
Remember, safety should always be the top priority when working with power tools. Ensure you follow the necessary precautions and procedures when handling a nail gun to prevent accidents or injuries.
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Check for nail jams and clear with screwdriver or pliers
When your nail gun jams, it's usually because nails have fed incorrectly and become wedged against the driver blade. This can be fixed by checking for nail jams and clearing them with a screwdriver or pliers.
First, disconnect the nail gun from its air supply. Then, retract the feeder mechanism and remove any excess fasteners from the magazine. Next, loosen or remove the Allen screws near the nose of the gun. You can then try to pull out the jammed nail. If it's bent, you may need to pry it out with a screwdriver. If it's jammed, you may need to use pliers.
If there's a really tight jam, you can try tapping the driver blade down with a nail set and a hammer. Make sure the driver blade is all the way down and remove the stuck fastener from the nose of the tool. Finally, tighten the Allen screws and you're ready to go.
It's important to note that you should always test-fire a few nails with some kind of protection between you and the nail gun after clearing a jam. Sometimes there are fragments left that will fire on the next shot.
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Oil the nail gun after clearing jams
To prevent jamming and ensure a long life for your nail gun, it is important to oil your nail gun with every use. Lubricating the o-rings with air tool oil helps protect the aluminium housing from damage due to moisture in the compressed air.
To oil your nail gun, put a few drops of nail gun lube oil in the fitting that the compressed air hose attaches to. You can also put a couple of drops of oil in the inlet fitting and on the moving parts. Make sure that the oil you use is non-detergent-based oil.
If your nail gun is jamming, it might be due to improper air pressure settings. Clear the nail jam in the tip, put a good amount of oil in the air hole, and then connect the air supply. Let it sit for an hour and see if this will force oil into places it needs to be.
It is important to note that over-oiling can also be detrimental. Drain the water from the air tank at least once a week, as moisture flushes the oil out.
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Replace faulty O-rings to prevent air leaks
If your Porter Cable nail gun is leaking air, it may be due to a faulty O-ring or a damaged seal. This is often the result of a faulty piston-head ring. O-rings and seals are responsible for preventing air leaks from the nail gun's cylinder.
To fix this, you will need to install an overhaul kit. Before beginning this repair, ensure that you have the right parts by using a power tool parts search feature.
Firstly, remove the trigger, trigger pin, and the O-ring that holds the pin in place. Then, remove the trigger from the gun using a wrench to take out the trigger valve. Next, slide the alignment ring over the cylinder, and extend the piston out of the cylinder. Align the nose and driver, then slide the cylinder assembly into place. Replace the gasket on the head and fasten it onto the gun, tightening each fastener gradually to guarantee a good seal.
Finally, reinstall the trigger, trigger pin, and the O-ring that holds the pin in place. Finish the repair by reinstalling the magazine onto your nail gun.
Remember to consult the manufacturer's instructions and, if unsure, seek professional help to ensure safety when working with pneumatic tools.
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Frequently asked questions
First, ensure the gun is unplugged and clear any screws. Then, remove the nail clips and try to get the jammed nail out. You may need to use pliers.
Nails can crumple and jam the plunger. Remove any stuck nails with a screwdriver or pliers, reload the clip, and test the gun.
If your nail gun is not responding to basic troubleshooting, it may need to be serviced by a professional. Ask your local hardware store for recommendations.
Always ensure the gun is unplugged and there is no air supply connected before attempting any repairs. Also, be sure to oil your gun with every use to prevent jamming.
Some users have reported issues with the O-rings, which can break and cause malfunctions. The head valve seal may also need replacing if air is leaking from the top of the gun.










































