Question about Dewalt Air Tools & Compressors

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I have a D55155 compressor. When completely empty of air the guages do not read zero, should they or does it take awhile for them to go down. Also where is the pressure switch on the D55155?

It seems to run often, but I think the disconnect couplers are worn. What is the parts number for them. I forgot to add that when using the regulator nothing changes on the guage.

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  • Dewalt Master
  • 885 Answers

GUAGES: Guages read exactly what pressure is on them at the time, there is no bleed down time. If the reading is off at zero it will be off accross the dial. The case may have been hit to knock the guage out of allignment or the needle is bent but that's hard to do unless the plastic cover is broke off.
PRESSURE SWITCH: The pressure switch is the black box under the large pannel right behind the quick connects.
LEAKS: Leaks cause compressors to cycle on and off frequently. They are easily found with soapy water in a spray bottle. The guages and quick connects should be replaceable with off the shelf (Home Depot, Lowes, tool repair shops) similar parts.
REGULATOR: If adjusting the regulator does not affect the pressure at the quick connects, and on the guage, it may be stuck or broken. This could also be the place to look for a leak. Dewalt does make a regulator repair kit, part number 5130027-00.

Posted on Nov 02, 2012

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Posted on Jan 02, 2017

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  • 65 Answers

SOURCE: coleman compressor no build up of pressure

your correct either the valves are worn or maybe just need cleaning as for the gaskets,idont know what part of the world your in but check out coleman on the internet or failing that ,i have maid these from gasket material suuplied from my local bearing supplier

Posted on Dec 03, 2008

  • 1388 Answers

SOURCE: coleman compressor no build up of pressure

Parts for coleman are available at www.mastertoolrepair.com your compressor is listed as L0502710. If however you like to tinker, you can make a pretty good reed valve out of aluminum can material or other (any ideas?). It is fairly easy to cut, does not last as long as factory stainless steel, but for short term, why not? Good Luck

Posted on Jan 10, 2009

  • 1388 Answers

SOURCE: dewalt D55155 air compressor regulator installation

The d55155 unit suffers from regulator problems due to weakness in the design of the manifold. The manifold parts are very light duty metal and will break during installation if not carefull. If you can return the parts to dewalt it may be more efficient to to use a generic pressure regulator from www.grainger.com for about 20 bucks and mount using a couple of 1/4" tees directly off the pressure switch. Remove the hose from the pressure switch that feeds air to the manafold . Install parts so that the quick disconnects, guages and new regulator are accessable from the side. It will not be pretty but problem will be solved for long term. We repair other brands that come with control panels using the same method. Pressure regulators built into a manafold will fail. For demanding customers we have recreated the manafold using 1/4 pipe fittings and refit the gauges and grainger regulator into panel.(lots of work) But leave the safety unloader at the pressure switch. If all you need is a good functioning compressor same time and money and mount to side. Good Luck and email if you have questions or other issues with your dewalt.

Posted on Feb 26, 2009

goofduck
  • 490 Answers

SOURCE: craftsman 3 gal ari compressor low presure

put a blower on the hose and see if air comes out
very possible there is a blockage in the hose or if you are using quick connects they may have failed

Posted on Apr 17, 2009

  • 1388 Answers

SOURCE: I have a 3hp 15gal air compressor that i bought

I am assuming that your compressor is oilfree type. Lets go over some basics to determine where fault is located. You will need to do some simple tests. If there are leaks the compressor may not reach set pressure. I use soapy water on all connections and on the head/headvalve (remove plastic covers to get to all parts that may leak) while compressor is running. Make repairs as necessary. If still low pressure, while compressor is running and has reached max obtainable pressure (in your case 15 lbs), carefully place finger over intake port hole (remove filter). If the compressor is pumping normally but leaking there will be ample suction at intake and cause the compressor to speed-up when intake is obstructed with finger. If you feel plenty of suction and no visible (soapy water) leaks, then the problem is probably the cylinder /ring is not correctly seating /scratched and air is leaking past cylinder. Make sure that the cylinder /piston ring is properly aligned and that the lip on the vinyl ring is up toward the head. On oilfree compressors you can examine the cylinder by pushing the piston all the way up, then look for scratches neer top of cylinder. If scratched install cylinder kit. If you do not feel suction but rather air blowing out of the intake, then the problem is the headvalve plate/reed valves are leaking. The reeds must seal perfectly on their seats and not be bent or have obstruction. Replace as necessary. Only one other thing to check and that is the intank check valve. Easy to check. Run compressor till you have about 15 + lbs in the tank then unplug compressor. Carefully loosen the inlet hose at checkvalve and listen for air leaking out of tank. If leaking replace checkvalve. Use caution when removing head to try and save the gaskets. If you see any model numbers on your compressor beginning with WL, you probably have a unit built by Campbell Hausfeld and can find parts at www.chpower.com
Good luck on your repair and email if you have other question.

Posted on May 09, 2009

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1 Answer

How do i start a dewalt d55155 compressor


Its switched automatic on when the air-pressure in the tank comes to a lower level .
Other is by hand but there can be build on a circuit breaker on your type if the powercord was manual used by hand without pressure relief by switch.

Sep 10, 2014 | Dewalt D55155 Emglo Air Compressor

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I want to know where the oil goes on this machine?


ON a d55155 compressor, you will find the dipstick on the left side as you are facing the control panel. Notice a small black knob on the end-bell of the pump. Pull out the dipstick and notice the oil level line just up from the tip of the stick. Over-filling will cause oil to leak. Use 30wt non-detergent oil or compressor oil. Good luck

Apr 02, 2013 | Dewalt D55155 Emglo Air Compressor

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Dewalt d55155 compressor runs to 60 lbs then acts like not enough power and shuts down


Looks like it's an oiled style compressor. Is it getting pretty hot by the time it hits 60psi? Might be low on oil, or the oil has been contaminated with water from condensation. If that's the case then what is happening is the compressor is causing too much resistance for the motor to turn it because of the excess friction. This is could be what is causing it to shut down prematurely.

Nov 23, 2012 | Dewalt D55155 Emglo Air Compressor

1 Answer

I have a DeWalt D15155, Type 2 compressor. Regardless of setting of the regulator, the downstream gauge shows the same pressure as the tank gauge and there is constant air escaping at the...


Sounds like the diaphragm is leaking. It is use pipe threads , so power down empty tank and remove the mounting bracket and gauge and unscrew the regulator A complete regulator is 5140442-76 You mat be able to find parts. Check ebay. anew one is about $100

Apr 21, 2017 | Black & Decker Dewalt #D55155 2HP 4GAL...

1 Answer

I want to change my EMGLO D55155 compressor oil. What type and how much oil should I use? Thank you!


The compressor tanks 4 ounces of oil.

You want to use a synthetic oil in this unit. We like to use Mobil 1 full synthetic 10w30 oil.

Here is a link top the owners manual:

http://shoppingcart.msservicecompany.com/msservice_net/product_files/D55155/D55155_OM.pdf

Oct 07, 2010 | Dewalt 2 Hp 4 GAL Air Compressor

1 Answer

I have d55155 and cant get over 60 psi, it never shuts off. how do i tell where the leak, o ring, or teflon tape should go. should the release valve be in a certain position? it seems down all the way


Could be leak or faulty valve plate in head. Use soapy water and spray all fittings including drain valve and pressure regulator. Repair as needed. If no leak found suspect problem with compressor. Try simple test, with compressor running and has reached max pressure (60psi) remove air filter and feel intake for suction. Be carefull could be hot. The suction should fairly strong. If no suction or actually feels like air is blowing out of intake, suspect valve plate. Parts are available at dewalt service center or www.toolpartsdirect.com. Good luck

Sep 22, 2010 | Black & Decker Dewalt #D55155 2HP 4GAL...

1 Answer

Dewalt D55155-QS 220 volts can it convert to use 115 volts?


The short answer unfortunately is no. The internal motor that drives this compressor requires 220 and will not work properly with 110. Your only option would be to replace the motor with one compatible with 110. The cost of that would approximate a major portion of a replacement unit.

Sorry about the bad news.

Dan

Jul 08, 2010 | Black & Decker Dewalt #D55155 2HP 4GAL...

1 Answer

I have a D55155 Dewalt air compressor. When I flick the switch to on the compressor sounds like it is starting very weak and then dies. A couple seconds later it repeats. Anyone know what this could be?


Yep! 2hp compressors need a strong power source. They'll draw alot of amps on initial startup. If they aren't getting sufficient power,they'll act just like this. It's causing the compressor's circuit breaker to cut out. Then when it cools off, it'll reset.
My suggestion is to avoid using extension cords if at all possible. The longer the cord, the harder it will be to start.
Try to plug directly into an outlet. If you need extension cords, use the shortest length possible. Also make sure the wire guage in your extension cords are no smaller than a 12guage wire(the higher the number, the smaller the wire guage).

Jan 02, 2010 | Black & Decker Dewalt #D55155 2HP 4GAL...

1 Answer

Dewalt D55155 air compressor regulator installation


The d55155 unit suffers from regulator problems due to weakness in the design of the manifold. The manifold parts are very light duty metal and will break during installation if not carefull. If you can return the parts to dewalt it may be more efficient to to use a generic pressure regulator from www.grainger.com for about 20 bucks and mount using a couple of 1/4" tees directly off the pressure switch. Remove the hose from the pressure switch that feeds air to the manafold . Install parts so that the quick disconnects, guages and new regulator are accessable from the side. It will not be pretty but problem will be solved for long term. We repair other brands that come with control panels using the same method. Pressure regulators built into a manafold will fail. For demanding customers we have recreated the manafold using 1/4 pipe fittings and refit the gauges and grainger regulator into panel.(lots of work) But leave the safety unloader at the pressure switch. If all you need is a good functioning compressor same time and money and mount to side. Good Luck and email if you have questions or other issues with your dewalt.

Feb 19, 2009 | Black & Decker Dewalt #D55155 2HP 4GAL...

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