Question about Dewalt Heavy Duty 2 Brad Nailer Compressor Combo Kit

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Dewalt compressor not filling with air constantly running

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Hi your problem seems to lie with the valves in the cylinder head not sealing i suggest you obtain a new valve set and replace said items
hope this helps

Posted on Dec 06, 2008

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SOURCE: dewalt compressor not filling with air drained tank closed valve

Some dewalt air compressors with single cylinder are known to develop trouble with reed valves and /or failed gaskets in head. Parts lists and parts are available at WWW.toolpartsdirect.com Simple test is to remove air filter and check for suction at intake. Bad reeds will tend to blow air out intake as pressure increases. Failed gaskets in head will cause very high temp at discharge hose. Parts are not too expensive. Enjoy

Posted on Dec 05, 2008

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SOURCE: dewalt compressor not filling with air

I have a Dewalt 2hp 4 gallon air compressor and it will not pressurize. When I turn it off I can hear and feel air coming out of a little needle valve where the line from the compressor goes into the tank. The pin is very small and down inside the hole - can barely see the tip.

Posted on Apr 25, 2009

6ya6ya
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Posted on Jan 02, 2017

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Hey there. I am having problems with my Emglo Dewalt d55151 compressor. I have taken it apart and and cleaned everything up. The reason I did all this was..because the cold start valve stays open and its...


The cold start valve will close when volume of air from compressor is sufficient to overcome spring under pin (allows the motor to come up to speed). Evidently your compressor is producing very little air. Usually the problem is leaking or broken reed valves or gaskets. Remove the head and look for torn/ leaking gaskets and replace as needed. Examing the reed valves and seats and look for broken cracked reeds or worn seats. Some of the valve plates used in Dewalt compressors are made of aluminum and would fail. Parts are available at www.toolpartsdirect.com or local dewalt service center. Good luck with your repair.

Apr 25, 2011 | Dewalt d55151 factory reconditioned emglo...

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Tank wont fill with air but compressor runs


Can you hear the air coming out? Or it is not pumping up at all? If the air is not coming out somewhere like the bypass or the regulator, or the drain plugs, then the reeds are shot in the head, it is an easy fix, and an easy part to get, I hope, call Dewalt's hotline and tell them what's happening, they will fix you up.

Mar 08, 2010 | Dewalt Heavy Duty 2 Brad Nailer Compressor...

1 Answer

Dewalt 4 gal air compressor will not build pressure in take.


The bleed valve is an unloader of sorts that allows the compressor to start with-out a load. It closes when the pressure in the airline reaches about 20-25lbs with good volume. If air volume is not sufficient, the valve will not close. To solve the problem lets do a few tests. A long cord will reduce power and reduce air volume. Try powering the compressor with-out extension cord. If bleed valve closes when you do not use a cord, the compressor is not getting enough voltage, use shorter cord of the 12 gauge quality and more hose to reach work. If valve still does not close, check for air leaks on all fittings including around pressure switch and drain valve with soapy water. Repair as necessary and retest. If no leaks were found, temporarily plug bleed valve port with screw/bolt and run compressor till set pressure cut-off while counting minuites/seconds. The compressor should fill and shut off within three minutes or so. If it takes an unusually long time to fill, then the reed valves /valve plate is worn and leaking pressure back into cylinger. Leaking valves will usually result in very hot discharge airline/air. Reinstall the bleed valve after test. Parts and partslist are available at www.toolpartsdirect.com . Good luck on the repair and email if you have other questions.

May 06, 2009 | Dewalt 2 Hp 4 GAL Air Compressor

1 Answer

Dewalt compressor not filling with air drained tank closed valve


Some dewalt air compressors with single cylinder are known to develop trouble with reed valves and /or failed gaskets in head. Parts lists and parts are available at WWW.toolpartsdirect.com Simple test is to remove air filter and check for suction at intake. Bad reeds will tend to blow air out intake as pressure increases. Failed gaskets in head will cause very high temp at discharge hose. Parts are not too expensive. Enjoy

Dec 05, 2008 | Dewalt Heavy Duty 2 Brad Nailer Compressor...

2 Answers

Dewalt compressor not filling with air


if you do not have any air leaks and it is a oil less compressor than it is most likely the piston seal is wore out. if it is an oil compressor that it is likely a flapper valve

Dec 05, 2008 | Dewalt Heavy Duty 2 Brad Nailer Compressor...

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