Question about Air Tools & Compressors
Iwent to use it and no air pressure at all air pressure will not build. my eye sight is bad so i could not read the directions that came with it.
Make sure pressure relief value is not pulled out
Posted on Dec 03, 2012
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Posted on Jan 02, 2017
SOURCE: Will not build up pressure
If this compressor is dry type with no oil needed, then it may have a worn cylinder and/or piston ring. With flashlight in hand, look under cylinder with piston in upper most position. If you see scratches most likely it needs cylinder / piston kit. Not to worry, not too expensive. If you compressor has a crankcase with oil, then you may have problems with valves in the head. Cracked or dirt under headvalves will prevent pressure from building. Finally there may be one or several leaks in the tubing, check leaks with soapy water. enjoy
Posted on Nov 29, 2008
At the web address below you will find a parts list of your compressor. The most likely problem areas are the tube seal and the piston/cylinder. The tube seal seals the discharge tube to the head of the compressor. It will fail over time and cause the problem that you have. (only costs a few dollars) The other problem that you could have is a worn cylinder. Your compressor is oil free thus the piston ring is made of silicone vinyl and wears depending on conditions at the job site. Heavy dust/ dirt will shorten the life of the unit. With unit unpluged and covers removed, push the piston to top of stroke and examine upper portion of cylinder. If you see groves/scratches install cylinder kit. (cost around 39 dollars) In most cases I would replace both the seal and cyl kit. These parts are also available at your local dewalt service center or on line at dewalt.com. The folks at dewalt are very helpfull. Good luck with your repair and email if you have more questions.
Posted on Mar 26, 2009
It sounds like you may have a broken reed on the diaphragm plate. This is located at the block. Remove the cover, and look for a cast metal assembly with fins. It will be attached to the side.
Posted on Apr 23, 2009
This is a fairly common problem in small pancake compressors. I would start by making sure no air is escaping from the condensation drain valve on the bottom of the tank.
Next Pump it up as much as it will hold and turn it off. Listen for air leaks around the fitting on the bottom of the regulator that screws into the tank. These really need teflon tape and to be screwed in well.
Next check the regulator itself. These are rather inexpensive and don't last long when the compressor is used a lot. Also it doesn't take much of a bang when jostled around.
Is the regulator for tank pressure set correctly? Thump the glass covering the dial with your finger. Sometimes it sticks and you'll think it's set correctly when it isn't.
Lastly, check each connection for tightness with teflon tape. If all looks good, gamble about $20 on a new regulator. Odds are that's where the problem lies. This has happened to me a few times.
Posted on May 12, 2009
Maurader1 an apprentice has this problem solved and is spot on. All these gurus and wiz need to stick to the basic and common sense. The first place your pump will give out after use or abuse is the gasket. All this garbage about defective reeds and defective pressure switch is a lot of nonesense if you first don't rule out the most common problem the head gasket. I'm cheap and this thing has paid for itself 10 time over. You can get a gasket kit for $7, but I fabricated a gasket out of the back of my notebook and sprayed some gasket spray and been working like a charm ever since.
Posted on Jan 04, 2010
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