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All air tools need regular, sparing application of tool oil to maintain the seals and minimize moisture damage. With the tool disconnected from the air line, drip one or two drops of air tool oil -- NOT motor oil or any solvent -- into the air connector. Position the tool so the air connector is up, allowing the oil to run down into the tool.
Again sounds like blown O ring give it a squirt of 3in1 oil and fire it several times (if oil is compatible in your gun). Repair center if that doesn't work. Trash can also get in the air orifice and stop moving parts from moving.
Did you check to make sure the driver is not jambed with a nail? Look for flat spots on the O rings and sometimes rotate the piston 180 degrees. Load the piston edges at the O rings with gun oil. Last resort turn the gun upside down and smack cap on wood with no air plugged in then plug air to it. Gun should cycle after this. Old Framer with many guns.
Rebuild gun with gasket repair kit. How it works: Compressed air enters through air hose and fills gun cylinder. When trigger is pulled, air inside cylinder rushes out and pushes firing pin that shoots nail.
Inside the gun there are gaskets that seal the nose, the trigger and the cylinder head. When any of those three gaskets fail, then air starts leaking.
Putting a few drops of nail gun oil into gun before connecting hose is supposed to protect gaskets. But everything wears out, and sometimes folks use 3-in-1 oil instead of gun oil. 3-in-1 is detergent type oil and will cause gaskets to fail.
Another thing is guns that are not used frequently and gaskets get dry. Putting in a few drops of oil and then immediately shooting gun will cause gasket to fail, because gaskets are still dry. Best to put in plenty of gun oil, and let oil go down into gun for a few hours before connecting hose and shooting. Even so, nail guns are designed to be used every few days with continual oiling.
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You need to open the nail magazine and you just load one strip of nails at a time, then close the magazine. It will have a spring putting pressure on the nails, so it will have resistance on it and it will increase as you close it.
The oil gets dripped in the air hose connection on the gun before you connect the air. Make sure that this gun actually takes oil, some newer guns are oilless.
A nail gun works on compressed air. When you hook the air hose to the gun it fills a cylinder with air pressure. When you pull the trigger. the cylinder pressure is released onto a firing pin that shoots the nail. The air pressure line is also connected to the trigger and therefore the trigger has to be sealed.
When ever using a nail gun, you add a bit of gun oil in the back of the gun (not 3-in-1motor oil, it has to be non-detergent gun oil)
If you haven't used the gun in a while, it is best to oil up the gun and let the oil run down into the gun. If you use anything but gun oil, the seals will give out.
Your trigger seal has given out. It is probably an 'O' ring. You can access it by taking it apart. Look for the O ring. Bostich makes re-build kits for the different guns that you can buy on-line. Back when I was in construction, there were several nail gun shops that sold and serviced nail guns, and sold nails to the contractors. I don't know if that business model is still active or if you have to send the guns to Bostich service center.
Yes. Roofing nailers all use about the same size and spacing on coil nails. You will find that Harbor Freight is about 1/2 the price of Home Depot or Lowes for those nails.
-Jim
Where does the air leak out from? If it leaks from the trigger DeWalt makes a trigger valve assembly part # 641006-00 list 8.89 BUT if it leaks from other areas we have to look into it deeper. If it is just the trigger valve let me know and I will give you instructions how to remove and install the new one.
Have you been lubricating it regularly with nail gun oil. We use
framing nailers every day at the commercial tree farm I work at and one
of the operating instruction is to put 6 to 8 drops of oil in the air
hose connection on the nailer before every use. I suspect the O ring on
the piston is worn out/
Hope this helps Good luck Loringh PS Please leave a rating if appropriate Thks
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