Question about Dewalt Air Tools & Compressors

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Is dewalt d51823 faming gun prone to trouble? I like it, but brought i new less months ago and have to send it back for second time, same fault, no fire, air just comes out round trigger. should i ask for money back. running brader off same new compresser

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Yes, I have had the same Issue. It is a pain to keep repairing but it would be better to go with a different brand

Posted on Feb 18, 2012

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D51823 manual

nailer worked for six nails, then air keeps going out the nailer end of my Dewalt D51823. I have replaced quick contects and air line

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DeWalt D51823 nailer shoots continusously when plugged into air hoswe

Shooting continusously caused by worn orings in the trigger valve and in the gun.Dewalt framing nailers use some vinyl orings (gold or clear in color) that fail too soon in both the trigger and the cylinder spacer (white plastic). Air out the nose of gun indicates air is leaking past the cylinder spacer seals (If piston is pushed down with air leak then headvalve seal is leaking (remove nails for this test)). If piston is not pushed down with leak, remove head and pull out the cylinder with cylinder spacer (white plastic). Place the cylinder on workbench with bottom up. Push down on locking ring and remove retainer to release all the other parts. Take picture or take note of parts together and as you pull them off to aid in re-assembly. You will need to replace the two orings between the white cylinder spacer and the cylinder. Order oring kit from dewalt or just purchase one ( # 141 universal oring ) and one metric oring 74.4mm x 3.1mm from hydraulic parts store. If the piston was pushed down with air leak, replace headvalve orings in the head. The trigger valve also has vinyl orings on the trigger pin. You could try replacing the orings but hard to find . Pin uses 2mm x 1.5mm. The orings on the inner valve should fit snuggly on the outer contact surface. If the valve just falls out the the body, the orings are too loose or the body is worn. I would just replace the trigger valve to be safe, however repaired works ok if you can find the orings. Trigger orings do not come in the kit. I would also remove the nails after each use and only reinstall them after air is connected and gun seems to work as it should. The Good luck with your repair.

Dec 23, 2012 | Air Tools & Compressors

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When i put air to my gun it has rapid fire and will not stop. How do i fix this

It sounds like either the trigger valve is stuck of malfunctioning. It is item 68 on this diagram. With the toll UNPLUGGED from air make sure the trigger pin is releasing as it should when the trigger is depressed. Obviously do not check this with it plugged into an air line.

DeWalt D51823 diagram

Aug 06, 2012 | Dewalt Tools & Hardware - Others

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Hey, I'm having trouble with my Dewalt 18ga Brad Nailer trigger. Can you send me the directions you have on how to get into this thing? I'd really appreciate it.

For removal of dewalt D51238k trigger valve. Remove the nails.
Remove the pin holding the trigger in place. Then remove two roll pins in the body of the gun just above the trigger (3mm roll pins). With gloved hand, apply air pressure to the gun which will pop out the trigger valve. Use caution because the valve could come out with force. Try with low pessure first, then increase as needed. If you are removing the trigger because the gun will not fire, (only puff of air from trigger area), suspect problem in the head valve instead (usually, trigger valve is bad if air leaks from trigger when you connect air ). Good luck

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2 Answers

I am having problem with my Dewalt D51823 Framing Nailer- air started leaking out of the nose always when is plug to the compressor. the gun is immaculate inside. quite annoying the compressor keep...

Either the plunger has not completely returned to the "pre-firing" position, or there is a defect in one of the o-ring seals. Make sure that the gun is sufficiently lubricated and if so, then next check the condition of the o-rings. An improper seal will cause this. It is also possible that the trigger assembly has a small crack/leak.


Jun 11, 2010 | Dewalt Heavy - Duty 31° Clipped Head...

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Replacing carraige in dewalt nailer

Be sure that the driver piece is in position. When replacing the actuation arm (the part with the spring), slide the driver down the nose piece as if it were driving a nail. This will allow you to slip the actuation arm down into place.

Let us know if you are still having trouble

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Nail gun leaking air through the nose.

Lets assume you have oiled the gun. Before you run out and buy an o-ring kit for this, take the gun apart and look for anything that may be jammed inside the gun. This could be dirt, grit or an unfired nail. The gun is very simple inside so don't be afraid to do this yourself. Undo the 4 hex screws holding on the cap at the back of the gun. Put the nose of the gun in a vise or get a friend to hold the gun for you. Grab hold of the cylinder inside the gun and pull it out. Wiggle it around and pull at the same time, it will be tight but it will come out. Totally disassemble the cylinder. If the seals look good take a very close look at the "Bulkhead". It is made of plastic and is prone to get very small hairline cracks in it and this will leak air. Look inside the cylinder and make sure the walls are smooth and not scored. This is all very easy to do. Don't just buy an o-ring kit assuming it will fix the problem. Look for the simple stuff first, it may save you some time and money. AGAIN IF THE O-RINGS LOOK GOOD TAKE A VERY CLOSE LOOK AT THE BULKHEAD AND LOOK FOR CRACKS, IF AIR IS LEAKING FROM THE NOSE THIS SHOULD BE THE FIRST PLACE TO LOOK AND COSTS ABOUT $7.00 TO REPLACE..........

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3 Answers

My monitor turns itself off

If it's only a few months old then send it back under warranty.
The fault you have is the inverter circuit.

Hope that helps. =)

Apr 12, 2008 | Acer AL2032WD 20" LCD Monitor

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