Dewalt D51844 Round Head Nailer Magazine Cap Assembly
I had to remove the Magazine Cap on my nailer to get a trapped nail out of the gun. I pulled the pin and the locking lever and spring came out and I do not know how they go back together. Do you have a diagram or can you tell me which way the spring and lever go in.
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Re: Dewalt D51844 Round Head Nailer Magazine Cap Assembly
Send email to dewalt and request exploded view of nailer showing parts list- usually they are clear enough to figure assembly. best guess.guys at dewalt are pretty agressive these days and if you take parts in to repair shop- they will more than likely repair it on the spot for free. good luck
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Just pull the pusher back along the magazine all the way until it latches. It should be located on the side of the magazine and looks like something you can grab with your fingers. Then load the nails in through the slot. Pull back on the same pusher until it unlatches and it should slide forward to push the nails toward the head.
Dewalt uses about 4 or 5 orings within the gun made of semi clear urethane that fail (turn gummy and breake apart). Two are under the bulkhead and at least two in the trigger valve. To remove the bulkhead pull up on the white housing. With housing and cylinder assembly out, push down on the black retainer at the very bottom and remove the oring(take a picture of the assembly after each stage so that you can re-assemble the spring and checkvalve correctly). You will find two large orings under the bulkhead against the cylinder that need to be replaced (also the orings in the trigger, or replace the trigger valve ).
Orings /other parts tend to stick when nailer is new. Dewalt uses some vinyl orings that have been causing premature failure. Be sure to add a few drops of oil when used. Too much oil is not good. Wrong oil will cause orings to swell and cause problems such as yours. Your nailer's firing valve can be reset by rapping the nailer against rubber surface such as a thick rugger mat or coiled rubber air hose. Remove airline and nails, being carefull not to damage the head, rap had against rubber mat and retest gun. If it did not reset rap against nose of gun and test. If no joy, you will most likely need to remove head and manually move cylinder up/down and /or check vinyl orings for failure. Before you try to reset the gun, make sure that the safety is pushing the firing pin all the way in. Air removed, look under the trigger as you push down on safey, if it does go all the way in try bump-firing the gun (for test have nails removed). Hold in trigger and quicky /firmly strike gun against rubber pad. Good luck
If the nails are stuck in the rails, remove the rails and fish them out. If a nail is stuck between the driver and nose of the gun, you will need to forcefully push the driver back into the gun. Remove the head and cylinder and place the body of the gun on piece of plywood with nose pointing up. Using very sturdy steel rod, hammer the driver down. The steel rod needs to be slightly thinner than the driver to allow for the stuck nail. I use a broken driver ground thinner on the side that will need to bypass the stuck nail. Careful when striking hard steel with hammer, could spinter (I use a heavy brass hammer). Good luck
This nailers are very inclusive , i have experience issues when i try other nails brands, and when i put DeWalt nails they work just fine. keep in mind that most nailers have a safety that when a couple of nails are in the magazine it wont shoot,
The Dewalt D51844 uses a full round head 20 degree nail. Sometimes the generic brand nails are not made exactly to the stated degree. They do this so their nails will work on a variety of nailers. Best to check the nails angle in relation to the angle of your nailer. Place a strip of nails on the outside of the rail. Align the heads of the nails to a convenient straight edge on the rail then check that the head and shaft of the first nail is aligned with the barrel. If the lower part of the nail projects out further than the head, then the driver will miss the head. If the head of the first nail appears close enough to barrell for the driver to hit it then place a new strip of nails into the mag and slide the pusher foward. Fire one nail, if success, remove the nails from the mag and check if the plastic holding the nails together is projecting in front of the first nail. Sometimes the plastic is not right, too stiff, and will not let the next nail align with the barrell. If the next nail appears ready and slides forward then the driver may not be going all the way up after shot. Check by inserting a metal rod into barrell and push driver up till it stops. If the driver is in the uppermost position, then most likely brand of nails. Use Dewalt nail. Good Luck
The problem that you are experiencing could be caused by several conditions within the gun. Lets work thru the possibilities. First make sure that the nails are correct for the gun. Place a stick of nails on the outside of the magazine with the first nail aligned with the path of the driver. The stick of nails should align perfectly with the path of the driver and also with the magazine. If they do not, don't use the nails. Check with dealer for correct nail. I find that short nails (around 2") will have a tendancy to jamb.
The driver will not travel to top of cylinder if the driver oring/ring is too worn or the driver is bent. The driver should fit snug into the cylinder but be able to travel rather freely . At the bottom of the cylinder check that the bumper is not missing pieces or is cracked. Some nailers have a washer below the bumper that fits snugly around the driver shaft. The bumper and washer prevent too much air from leaking down thru the nose and helps to push the driver back up to top. There is a check valve around the med section of the cylinder that is what actually caused the piston to return to the top with force. You must remove the cylinder to check. Parts are available at www.toolpartsdirect.com. There is also a rebuild kit for this gun. Enjoy