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Re: the nailgun only shoots the nail in halfway
The Hitachi nv45 series guns are lifetime guns and parts (parts available at www.toolpartsdirect.com) are not too expensive. There should be no air leaks for best results. If air leaks from the trigger area remove the trigger and white plastic plunger. Make sure that the plunger has oring and the ball that the plunger acts against is whole. If air is leaking from the boot around the firing pin then remove the head of the gun and pull off the cylinder ring and check the outer oring. (After you remove the head, the cylinder ring is the part that has two threaded pull points, the outer oring sometimes breaks causing leak) With the head off push the piston all the way down and make sure that the driver extends about 3/16 past barrell. If the end of the driver is wrorn to round shape, you can grind it square if there is enouth length left. If the sheet seal is good the driver will not pull out of the cylinder.(look at parts diag. to find sheet seal, it is below the bumper) If the driver easily pulls out of the cylinder then open the gun from the bottom and examine the bumper and sheet seal and replace as neccessary. If the driver will not pull out of the gun (thats a good thing) then pull up and to side enough to peek/look at the lower bumper to check for cracks or missing pieces. The driver oring should hold the driver in upper position. Check that the top edge of cylinder is smooth and seals against the vinyl part in the head. Use caution not to damage the top edge of cylinder. The oring kit for this gun will cost about $20, however you only have to replace the worn parts for good results. Let me know if your air leak is somewhere other than stated above or other questions. Good Luck
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The SFN1 is a great nailgun, built for professionals, and is pretty much indestructible. It's air leak is most likely an O ring that is worn out. While it is theoretically possible to figure out which one it is, and replace it, the smart move is to have the gun rebuilt by an approved service tech. I usually pay about $60 to have my SFNs gone through. My oldest SFN1 is 18 years old, and it has only been rebuilt once.
The driver is coming down far enough to break the nail off the strip but not far enough to drive it in. This could be caused by any of the following: - The driver is broken off and too short to drive the nail - The driver is bent and doesn't travel all the way down - The seal/o-ring on the piston is damaged and air is leaking past it Any of the above will require you to remove the head and inspect the driver, piston and o-rings or have a service center check it out.
The only adjustment on nail guns is for the nail drive depth, the magazine is hard mounted to the nose piece. If you are having problems with the nail clips feeding, first make sure the entire feed path is clear of any nails, parts of nails or other foreign things. Then make sure the nails you are using are fully compatable with your nailgun. Your gun needs 16 guage nails set at a 20-degree angle no shorted than 1 1/4" and no longer than 2 1/2" long. Any deviation from those requirements will only give you a headache worse than what you have now.
Without model number I cannot be more exact, however, air leaking from nose as soon as you connect the airline indicates that the cylinder spacer orings are leaking. The cylinder is usually sealed by a plastic or metal ring with an oring at the outer edge and seals against an oring installed at the cylinder. Broken oring or grit entering the gun will cause the orings to leak. A quantity of air leaking from the nose when you fire a nail indicates that the lower bumper is cracked or missing pieces. Air leaking from nose with driver being pushed to bottom of cylinder when you connect the airline indicates that the cylinder seal at top of cylinder is leaking. Parts are available at www.toolpartsdirect.com Good luck with your repair and post again with model number if you need more help.
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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This happens sometimes try holding it up against a board with the trigger depressed and then inset the battery.
The goal is to try to force the firing sequence to get the piston back to the right position with corded units this is simply done by attaching the air hose with the trigger pulled this causes air to rush into the gun chamber pushing the piston back and firing a nail out.
The cause of this is a misfire or jammed nail that stopped the piston in the wrong location so air will not build in the chamber correctly.
Nail guns either have a switch or a seperate trigger assembly for two options - automatic, or 'bump' fire, and sequential fire. Sequential firing may be best for you since the nose must be fully depressed and the trigger pulled for each nail.
If you're stuck with bump firing, practice your technique. Double fires often occur when the workpiece bounces back into the nose of the gun; learn to 'bounce' the gun off the material to avoid this second contact.
If you're getting double fires in sequential mode, the problem could be more serious. I keep a can of aerosol silicone lubricant on hand to clean and lubricate the feed mechanism and magazine. Make sure your tool is clean and lubricated before each use, including the 3-5 drops on the air coupling.
Check that your air pressure is not set too high. Overdriving nails reduces their effectiveness and can cause tool malfunction.
This problem could also be caused by worn out O-rings or other parts within the tool. If you're not comfortable servicing the tool yourself, take it in for repair/maintenance work.
Another important thing to remember: With tools like this, you get what you pay for. A cheap nailgun will never function as well as a quality nailgun.