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Compressor running constantl but unable to build more than 60psi. No air leaks and the drain bung is tight.

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There might have a leak inside the vaive plate in the cylinder head,either joint or valve blade damaged.Or piston ring are worn out

Posted on Sep 29, 2009

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1 Answer

My black&decker electromate 400 compressor runs but will not build pressure


Mark:

There is an air leak in the system. check the easy stuff first. let the compressor run, and carefully feel around the ends of the tube that runs from the compressor cylinder head to the tank. You can sometimes feel where the air is escaping. You can also squirt a soapy solution on the ends of the tube and look for bubbles or pressurized air blowing the fluid back in your face :-).
When you find the leak, you will know how to stop it. Also check the drain valve at the bottom of the tank to make sure that it is closed and not leaking. Check your hose connections for leaks... remove the air hose and run the compressor.. if it builds pressure, your hose connections are leaking. The harder stuff... Take the shroud off, check the head bolts for torque and the head gasket to see if it is blown, (Use the soap solution). The really hard stuff... If you have found no leaks, the valve body or piston ring(s) are the problem. You'll need to pull the cylinder head and replace the valve body or piston or piston rings.

Good luck

Sep 14, 2013 | Hdc Homer Hdc 2 Hp, 4 Gallon Pancake Air...

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

Air compressor wont produce more than 60psi


clean the one way cheak valve on the head of the air compresser motor whier the big line comes out and goes to the tank.

Sep 09, 2012 | Coleman Powermate 27 Gallon Air Compressor

1 Answer

My air compressor won't get past 60psi but keeps running and isn't leaking air anywhere when I shut it off


Your problem lies with the valve plate and/or piston & cylinder. If one or more reed valves on the valve plate are cracked, bent or broken; pressure will only build to a certain point. If either the ring on the piston is damaged or the cylinder is badly scored it will not be able to compress air beyond a certain point. Unless the tank pressure reaches 120psi to 130psi the pressure switch will never turn the motor off.

Feb 18, 2011 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

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

My compressor charges up to 60 PSI. It keeps on running but will not charge over 60PSI. I feel or see no leaks. Why?


Reed Valves in cylinder head. Pull head off and order Valve Kit through Campbell Hausfeld. Phone number etc is on internet.

Apr 27, 2010 | Campbell Hausfeld 26 - Gallon Air...

1 Answer

Craftsman compressor model no 919.153160 Runs fine, but does not build up pressure past 60PSI. Will not shut off as the pressure does not reach to cut off pressure. Where to start looking>


you have a valve problem in head /or leaking head gasket /or a bad leak in system
take off breather and see if it is pulling air it sould not be pushing back
one other thing would be the unloader at pressure switch or tank check valve

Dec 30, 2009 | Craftsman Air Tools & Compressors

1 Answer

Porter-cable compressor stops and restarts at about 60psi


You prolly have a leaky gasket in the main valve. Air is leaking and causeing it not to go about 60psi, you probably have it set to reach a high PSI but since the leak is not allowing it reach above 60 it keeps cycling trying to get above it

Aug 27, 2009 | Porter Cable C2002 Wk 150 Psi 6 Gal. Oil...

1 Answer

Wont build air pressure


Your problem falls into one of two categories the first is the tank is leaking the second is the compressor is leaking. Try this run the compressor for a minute or two and turn it off if to hear a hiss the tapers off slowly your tank is leaking some were check the drain on the bottom of the tank, the pressure relief valve on the top or side of the tank and all other connections between the compressor and tank.

In the event there is no hiss this means the problem is the compressor you may have a bad reed valve or a bad check valve depending on the type of compressor.

hope this helps

Mar 28, 2009 | Hitachi Air Tools & Compressors

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