Question about Porter Cable C2002-WKR 150 PSI, 6 Gal. Oil-Free Compressor w/13 Piece Hose & Accessory Kit

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The compressor builds up pressor but want shut off. Everyone said to replace the pressure switch and i did.Nothing has changed it stills builds up pressure and the safety pops out.

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Have a look to see if the pressure relief valve is not opening before the pressure switch is supposed to shut off the compressor?

Posted on Mar 11, 2011

  • briank25
    briank25 Jan 16, 2013

    I am having the same problem and yes the pressure relief valve is opening before the pressure switch shuts off the compressor

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1 Answer

My air compressor will not shut off and seam like it does not build pressor


Check for a leak as it will not shut off or build pressure if its leaking.

Mar 01, 2015 | Air Tools & Compressors

1 Answer

Cl6506016


Hi Larry


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.
Please take time to rate me
Bud
If correct then it will suck 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

Apr 30, 2013 | Air Tools & Compressors

1 Answer

I have a portible air compressor, with two gauges on it and it takes a long time to reach its pressure, also once reached it does not shut down


Make sure the air intake filter is clean and make sure there is no leaks in the metal lines and hoses of the compressor by putting liquid soap around the fittings and looking for bubbles. If the compressor is used a lot you might have bad ring on the piston. Since it does not shut off when it reaches pressor the pressor switch might be adjusted right or if it does not adjust you have to replace the pressure switch.

Mar 15, 2011 | Garden

1 Answer

My compressor builds up to preset pressure just fine. My problem is after the pump shuts off, the air leaks down at the valve on the pressure switch. I have changed pressure switches and still have the...


This switch is only rated for up to 2 HP at 240 volts and 1-1/2 HP at 120 volts. Using 3 phase power, you can go only up to 3 HP. That would not cause the problem that you discuss, but it is an unsafe condition.
Some Square D switches have a small relief valve so that when the compressor reaches pressure, the motor stops and the relief opens and lets pressure out of the compressor cylinder. Does your switch have that and might that be what is "leaking"? I believe that if the compressor is tight that the leak would stop rather quickly.

Dec 11, 2010 | Square D 9013FHG14J52M1X Air Compressor...

1 Answer

Leaking air


When the Pressure switch shuts off, the little air valve in the pressure switch vents the copper line from the compressor, to blead the pressure from the compressor so it's easier to start the next time. If it continues to leak, the check valve between compressor and tank must not be holding.

Jul 16, 2010 | Ingersoll Rand - Rand - Ir 2545K10FP Type...

1 Answer

Compressor stops then leaks down to low setting


That little copper line is an unloading line, to bleed compressed air out of the compressor head so that the motor can more easily start the compressor. Pressor switch should be threadded into top of air tank, and the unloading valve is built into the side of the switch. When the tank reaches the high pressure setting the switch disconnects power to the motor and opens the unloading valve at the same time. The unloading valve should be connected to the compressor discharge line through a check valve with an unloading valve port upstream of the check valve. These valves are usually threaded into the top of the air tank as well. Sounds to me like your valve was leaking and someone bypassed it.

Sep 14, 2009 | Ingersoll Rand - Rand - Ir 2545K10FP Type...

1 Answer

Compessor trips circuit


IT SOUNDS LIKE YOUR COMPRESSOR IS NOT UNLOADING WHEN IT SHUTS DOWN. YOU SHOULD HEAR AN AIR RELIEF SOUND TYPICALLY ON THE SIDE OF THE PRESSURE SWITCH WHEN IT SHUTS DOWN. ITS A SMALL VALVE WITH A TIRE VALVE THAT THE LEVER HITS AND RELIEVES THE PRESSURE FROM THE DISCHARGE LINE AND THE TOP OF THE PISTON.

YOUR CHECK VALVE COULD BE BAD LETTING PRESSURE BACK UP BUT IT WOULD BE BLOWING AIR OUT ALL THE TIME WHEN SHUT DOWN.

IF YOU THINK THE VALVE OR SWITCH IS WORKING AND WANT TO CHECK IT, LET THE COMPRESSOR BUILD UP AND SHUT DOWN, LISTEN FOR THE AIR RELIEF,IF IT DOESNT THEN CRACK THE DISCHARGE LINE AND SEE IF THERES ANY PRESSURE, MANUALLY RELIEVE THE PRESSURE THEN USE SOME AIR AND SEE WHAT HAPPENS. REPAIR VALVE ON THE SIDE OR CHANGE PRESSURE SWITCH $30-40.00. HOPE THIS HELPS. PLEASE REPLY. JODY

Apr 04, 2009 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

Leaks after it builds up pressor


hello, have you checked your pressor relief valve to make sure it has'nt gone bad it's located on the bottom of your tank.

Mar 27, 2009 | Air Tools & Compressors

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