20 Most Recent Dewalt 2 Hp 4 GAL Air Compressor - Page 4 Questions & Answers

Not enough volume... if psi is good just increase the size of the line.

check your regulator to see that 80 is what the gun is receiving and if it is move to 90 psi

https://www.manualslib.com/manual/1164551/Dewalt-D55141.html?page=2#manual

The box store pumps are usually sandborn pumps. I would find the model number and brand on the pump and go from there.

Try rearranging all the parts of the gun if possible. Clean them and try using them again , It should work.

You will have to get a new gasket. I had the same problem but I had drop my gun.

you can check a company in Wisconsin, Thomas industrial supply. this guy tom knows everything about fasteners. and what works in what. 1-800-836-1009. he can get stuff as dewalt dealer/ Black & decker.

Replace valve.Is the 45 psi in the tank or the regulated pressure that happens to 45 psi? Part 14 https://www.ereplacementparts.com/valve-safety-175-p-58678.html?osCsid=v6l1omob7oegoo1c7sibbsu5h3

The seal # 390140-00 installed on the upper part of the cylinder will allow air to come out the nose of the gun as well as the bulkhead orings as you suspect. Here is what I do the check the fit of the clear or vinyl orings on the inner side of the bulkhead. Remove both of the orings from the cylinder that come into contact with the inner side of the bulkhead. INstall one oring on the cylinder first then slip bulkhead on to check for snug /firm fit. If the one oring feels loose add a couple turns of Teflon tape under the oring and repeat test until contact feels firm but not too tight. Then remove this oring and try the other oring for fit and do the same if it feels too loose. When the second oring feels good go ahead and install both orings and re-assemble. It should work. I do not like the vinyl orings that come in the kit, I usually order buna orings to fit from "orings and more" on the internet, they sell orings by size so you must order the size needed. If you do not know how to measure the orings for size, take the orings to a hydraulic store or a bearing shop and they will tell you what size they are. vinyl orings do not last like the buna . Good luck

Air leaking out the nose is indication that the orings at the bulkhead are leaking or the cylinder seal is no longer holding back pressure. If the driver piston is pushed down when you connect air to gun then the cylinder seal is bad, of however the piston stays at the top of the cylinder when air is connected, then bulkhead orings are bad. The bulkhead orings are located around the outside of the cylinder and make contact with the outer housing of the gun. Good luck

I do not have a picture, but maybe I can describe how to assemble. The rear of the regulator has a removable plug the reveals two parts, a spring and a valve with rubber seat, the spring goes against the plug and pushes the valve against the seat on the body of the manifold. I find that this valve gets stuck on the plug and will not work correctly, easy to repair however, just remove the valve from the plug and apply grease so that spring can work forcing the valve against the body of the manifold. Reinstall the rear plug and verify that the valve moves by pushing down on part of the valve that sticks out from the adjustment knob side. Now for the knob side of the regulator. Insert the adjust screw into the housing with the square head first. This square head is what the adjustment knob turns to adjust the pressure. When installing this part, turn the adjust mut so that there is pressure on the heavy spring. Next on the adjustment screw is the heavy spring followed by the round plastic piston that has a lip seal on the outer groove. The piston lip seal goes installed with the open lip facing the body of the manifold and away from the heavy spring. There is a small oring that is installed on the round plastic piston at the center. This small oring makes contact with the valve that you installed from the rear of the regulator. So that's it. I hope that you can make it work with this description. I have worked on many of these regulators and find that most of the problems arise from the valve on the back side of the regulator, getting stuck on the rear nut due to water. Next problem is the round piston with the lip seal cracks due to too mush tension when cranking down on the pressure adjustment knob. Finally the third problem is the small oring at the center of the round plastic piston will get out of shape and not seal against valve installed from the rear causing leak at the adjustment knob. Good luck

ADJUST THE DEPTH GAUGE ON THE NAILER! lol.

Dewalt have a 3 year warranty on their tools so I'd get in contact with them and let them sort it for you.

try amazon

https://www.amazon.com/DeWalt-D55155-Compressor-Replacement-Regulator/dp/B00AF1QOB8

you can buy replacement parts call Dewalt for more info https://understanding-air-compressors.com/use-caution-with-your-air-compressor-extension-cord DeWALT D55152 Parts List and Diagram Type 1 eReplacementParts com

probably part # 30 here http://www.ereplacementparts.com/dewalt-d55155-type-compressor-parts-c-1009_3079_3080.html Dewalt D55155 Type 1 Compressor Parts

check / replace the start run capacitor for the motor check that the motor is not burnt out

The "dues" keep blowing ???

if new, take it back and replace it. if old, contact dewalt.