I have had a Dewalt d51825 frame nailer for a week, worked awesome, set it down working on Friday, went to use it today and it won't fire and bypassses air through the trigger when pushed. Took it apart and checked the o rings, seemed to look okay, any suggestions? Thanks Mike
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Go to the Dewalt service site at http://servicenet.dewalt.com/ (Stanley now ownes Dewalt/Black & Decker). Put your model number, SB-1664FN (with the dash) in the FIND PARTS search box and you'll go to a page where you can view or download the manual and parts breakdown.
Using the web address below for reference, item number 46 is a small slider button on the nose of your gun. Push in on the slider and adjust the safety nose up into the gun for setting the nail deeper into the work. Good luck on your projects
Problem you describe is typical of stuck driver or firing valve. Easy to check; remove head and make sure piston moves down cylinder (upon removing head, piston should be at top). Your gun utilizes sliding cylinder instead of moving valve in head. When you pull the trigger the cylinder moves down allowing air pressure to drive piston down. Orings swell overtime which prevents the cylinder from moving/firing. If cylinder does not move down/up, may be time for rebuild kit. Parts are available at dewalt service center or can be ordered from www.toolpartsdirect.com. Good luck
You have a crumbled trigger seal. You can order a new trigger valve through bostitch. It usually takes a couple of weeks though.. Every time I order one it is on backorder. You will need to order trigger valve kit part number TVA11 $21.40. Go to the Bostitch website click on Schematics and Parts to the left then find your model nailer in the search field and select item 53 when the parts list comes up. Click add to cart to order. Another screen will pop up and ask you if you want to checkout. Any questions please post back.
couple of things there are o-rings inside that trigger assy. they are either pintched in or dry. next there could be internal rubber hoses inside the gun. might need replacing. lastly the hose or o-ring going to the back side of the ram is leaking or broken. here is what i would do. you sound pretty handy with your tools so i would get somewhere clean start taking the gun apart thouroghly noting where everything went and go untill you find the problem. but first i would shoot a couple of drops of oil into the air input on the gun then hook it up and fire a few off and see if it clears up, if not then start takeing it apart. I CAN NOT STRESS ENOUGH....DO THIS ON A CLEAN SERFACE WITH YOUR HAND CLEAN. i chased a leak around in a pnumatic hammer for 3 days all because it wasnt clean on the inside..