(3)Piston O-ring worn or damaged.Replacement O-ring. Nail guns … Viewed 4k times 0. DeWalt D51257 has been lightly used for home projects but it stopped working. Nail Gun Depot offers great pricing on Paslode, Senco, Dewalt, Hitachi, Bostitch, Duo-Fast, BeA and others. Full Round is … Ask Question Asked 3 years, 3 months ago. When trigger is pulled, only air is coming out (through the trigger area) but no nail is fired. DeWalt nail gun leaks air when trigger is pulled. clipped head nails in a full round tool or vice versa – or wrong nail angle e.g. Use an Allen wrench and a large hammer to blow the driver free. As with most air nailers, when properly maintained DeWalt framing nailers will give years of trouble-free service. Low lubrication symptoms: Air leaks; Driver jams; Pusher guide malfunctions; Nail loading errors; Not firing; Correct Nails. Tools leaks air through nose when trigger is depressed.Piston/driver does not return fully. All guns only need a couple of drops before each day of use or per 1,000 nails. The most common issues, other than simple troubleshooting, are caused by one of two parts, the driver cylinder or the trigger valve. The reason and repair way for the nailer’s leaks air . The last time it happened, I had it in and the dealer repaired it and wrote it off to "These things happen". Air and cordless framing nailers, flooring nailers, finish nailers, construction staplers, upholstery staplers, nails, staples and more. I have a Senco clipped head FramePro nailer that is about 6 years old. Pneumatic nailer leaking air. DeWalt Framing Nailer Troubleshooting / Repair Guidelines I) Symptom: Skips fasteners (won’t fire a nail every time) 1) Wrong nails used e.g. Air leaks; Broken parts or casing; Heavy wear; Lubrication. The easiest method to repair the Bostitch nail gun when this happens is to remove the head, uncover the cylinder and place the nail gun on a piece of wood with the nose facing up. For the second time now, it has started leaking air (not too much) out the exhaust port. The D51844 is a framing nailer capable of driving up to a 3 ½ inch long full round common nail. Tools & Nail Guns Ship Free! If the nail head gets stuck between the barrel and the plunger, the gun gets stuck and only fires air. Bostitch type 28 deg nails will not work. The reasons are as follows: (1)Bumper cracked or damaged.Replace bumper (2)Piston or cylinder damaged.Replace damaged part. Active 8 months ago.