I have a bostich framing nail gun and as soon as i hook my air hose up to it the air comes directly out through where the driver is, dont even have to pull trigger, can u help, need gun operating to make money, thanks CP.

The tip of the driver could be missing. Easy to check, remove nails from the gun, connect air, then push the nose against rubber hose (scrap airhose) (tilt the gun to side while pushing the nose against hose so that you can see the driver come out) and depress and hold trigger. When you fire the gun the driver should be visable (about 3/16 past nose). If you dont see the driver, then most likely broken at tip. If the driver is visable, then most likely adjusted to high or safety foot bent. Good luck

n80 coil nailer is a very powerful nailer used for hard wood. If the driver is setting nails too deep, adjust safety foot to the lowest level. Install safety foot no-mar boot to lift the gun even higher. If still too deep, most likely the lower bumper inside the gun is worn-out or cracked. Easy test. Remove nails and connect air supply. With trigger depressed, push and hold the gun against work (I use an old rubber hose tightly coiled up). This will fire the gun but keep the driver down allowing you to examine the tip of the driver. The driver should extend out past the nose less than quarter inch. If the driver is extending too far, most likely bumper is worn out. If a large quantity of air is leaking out the nose of gun during the test, indication that lower bumper is cracked. Good luck.

The driver must be all the way up for nails to feed properly into place. Remove air and nails from gun. Examine the gun for driver neer bottom of gun. Driver could be broken or missing. If driver is neer bottom, push driver all the way up and test for proper action. If it only shoots one nail, time for oring kit or driver is bent. If it continues to work add only a few drops of oil as needed during use. If oil is coming out of nose, you have added too much oil. Parts are at www.bostitch.com. Good luck

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.

You either have a piston stop bumper failure or some damaged orings. Look on the schematic and the piston stop bumper is number 11, part #107236. A lot of times the piston stop bumper will disintergrate due to becoming brittle from the compressed air and not having enough lubrication. Look for small plastic balls in the head under the valve. If you see little plastic pieces than that is what remains of the piston stop bumper. You will need to remove the valve from the head cap in order to inspect the bumper. Also inspect all orings. The slightest damage can have big effects. One other thing to look for is damage to the plastic valve that rides on 3 orings. (2 out and 1 in) I don't believe you have valve damage because you say it is firing like a machine gun. This is almost always the piston stop bumper.

You have an o ring that is split and needs to be replaced, I would recommend getting a repair kit and redoing the whole tool that ay you know they are all new. Give me the model number and I will try and locate one for you and also the area (zip code) and see what i can help with. they are not that bad to repair if you are mechanically inclined.

Go here bostich suport page:

http://bostitch.com/default.asp?TYPE=STATICLEFT&PAGE=Support.htm&LEFT=left_support.htm

The F28WW takes 28Deg nails that are collated with wire, so your nails won't work in that gun. The N80SB is also a 28Deg nailer so your 30 Deg nails won't work in that gun either. Sorry about the bad news but it looks like your going to have to spring for new nails

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.

Generally, air leaking from the nose of the gun is caused by the vinyl headvalve/cylinder seal. It is installed on the headvalve and snugs against the cylinder. I would also check the cylinder ring supporting the cylinder that is visable when the head is removed. The cylinder ring is made of white plastic and has an oring on outside edge and seals against the cylinder with another oring. The ring tends to crack allowing air out nose. Some cylinder rings were made of metal, which is better and do not fail. Metal or plastic, check the orings there. Not to worry, these parts are not expensive and available at www.bostitch.com. enjoy