Question about Dewalt D55155 Emglo Air Compressor

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My De Walt D55155 portable compressor wont build any pressure

Won't build pressure,put finger over output port on head and compressor comes to halt until I remove finger.

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Posted on Jan 02, 2017

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1 Answer

Stanley Bostitch compressor cpack model runs and runs but won't fill tank.


check for any air leaks and fix as needed. then look for oil coming from cylinder heads , if oil is coming from heads you have blown head gaskets ,it wont build pressure like this. you might also check the pop off valve to be blown open. push the pin in and see if air starts to build up then. If so get a new valve.also check the drain valve under the tank and make sure its closed.

Apr 17, 2013 | Air Tools & Compressors

2 Answers

I have a porter cable compressor, but the pump won't shut off, and the pressure won't build it


Hi

Here are a few things to check, you may have already checked some of these.

*Electricity...Compressors will run best with full 115Vot 15AMP/Or 220V electrical supply from a circuit, over the shortest electrical cord as possible.

*Air Leaks..Place your ear close to the compressor and listen for air leaking, if you hear air that is not normal and means you have to locate and repair whatever it is that is leaking.
*Check the air unloader valve... The air unloader valve will blown out air when you turned off the compressor, that is normal.
But it should not have air leaking out of it all of the time. If so then it is faulty and in need of repair/replacement.
*Valves...If either the intake or exaust valves fail, breaks, or fails to seat, then your compressor will run 24 hours a day and never build up to the correct pressure for shut-off.
*Gaskets...Check to see if your gaskets have failed.
You could have a gasket failure between the pistons and you will never know it because it shows no external air leak.
If this situation happens then the air will only cycle between cylinders and never build up the correct air pressure.
One way to check the gasket is remove the air filter, then put your hand over the intake.
If correct then it will **** you hand against the intake.
If the valve or valves have failed then you will feel the air sucking in and blowing out.
*Piston Rings and Cylinder...The piston rings could be stuck,broken, or worn and not allowing the correct pressure to build up in your tank.
A worn cylinder will also contribute to the problem of pressure build-up.
*Pressure Switch...Check for air leaks at the pressure switch, it has a rubber diaphram that can fail and leak air out of the system.
Please take time to rate me
Bud

Nov 01, 2012 | Porter Cable Air Tools & Compressors

1 Answer

Cf2600 won't build pure pressure. Could air intake be stopped up. Had dirt dobber stop up on older compressor. Where is air intake. Can't locate.


No there is not a filter. Since the pump is enclosed in the plastic covers there would not be a way to service it. Now if it is not building any pressure then it could be a few things. First would be the drive belt. (item 125) If it breaks then it won't pump at all. Also if the air hose that exits the pump (item 122) gets a hole in it then it won't fill the tank. A worn head valve plate (item 106), blown gasket (item 105), or a worn piston and sleeve (items 109 and 112-2) can also cause this. If the check valve into the tank (item 16) gets stuck open it too will limit how much the compressor will pump BUT usually it will build up some pressure then just keep running without building any higher pressure into the tank.

Here is a parts diagram so you can see where the belt and other parts are located plus it contains all of the part numbers.

PC CF2600 diagram

Aug 23, 2012 | Porter Cable Air Tools & Compressors

1 Answer

Compressor won't build more than 30#


Most compressors that get at least that much pressure usually have a problem with the piston-rings-cylinder or the valve plate has bent or broken reed valves. Not knowing what make or model compressor you have, you'll have to remove the head and valve plate if so equiped and check them and the cylinder to see which is damaged and repair that.

Feb 20, 2012 | Air Tools & Compressors

1 Answer

Air compressor will not restart after it builds pressure and pressure drops to 80 psi


Make sure the power cord is plugged into an adequate extension cord if one must be used. Never less than 12 gauge wire.

The start/run capacitor may need to be replaced.. If there are any ball check type valves, make sure they are not worn or sticking. they would be on the output of the compressor head itself.

Dec 13, 2011 | Hitachi EC12 Portable Electric 2hp Air...

2 Answers

Compressor 25 psi thats it


I assume it keeps pumping, but doesn't build any more pressure. That is probably bad valves or rings. If your unit has a crankcase breather, and it is puffing alot of air, look for rings. Otherwise valves.

Dec 15, 2009 | Campbell Hausfeld 26 - Gallon Air...

3 Answers

I have a dewalt D55155 compressor that has not been used in three years. It starts and builds pressure, but does not charge the air hose. Ant thoughts?


have you turned up the regulator, the big black know by the output fitting

You may have to open andclose it a few times cuz it may have trash or be stuck

Nov 04, 2009 | Black & Decker Dewalt #D55155 2HP 4GAL...

1 Answer

Added detail for D55155 problem


well if it has been used for the past 5 years im suggesting the valves strip the head off and inspect items get back to me with results

Nov 02, 2009 | Black & Decker Dewalt #D55155 2HP 4GAL...

1 Answer

Portable oiless compressor wont pressurize


If there is pressure at the pump, either:

1) The tank check valve isn't opening (it's located where the line from the head enters the tank - usually extends into the tank, and the the pressure switch unloader line comes off of it as well)
2) The pressure switch unloader is bleeding off the air. This is a small valve on the side of the pressure switch. It should close when the compressor is running and open when the compressor shuts off to bleed off head pressure.

Oct 19, 2009 | Campbell Hausfeld No.FP2028 Gal Pancake...

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