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Aircompressor will pump up good pressure but wont regester but pounds on gages but when you release air it flows out of release valve for a long time what do i need to do

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  • 18 Answers

You must change the release valve, because it cannot good

Posted on Apr 11, 2014

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Posted on Jan 02, 2017

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SOURCE: Air Compressor shuts off

Most compressors have a check valve installed in the tank that allows air from the compressor to enter the tank and not allow back pressure to the compressor. Also there is an unloader valve at the pressure switch that activates when the pressure switch cuts out releasing the pressure in the line. These two devices allow the compressor to start in an unloaded condition so that the motor will not strain. When you place you finger on the intake, the compressor is no longer pumping air thus there is not load on the motor. Your problem may be the intank check valve or the capacitor may be weak or bad. Simple check for both. Many volt meters have capacitor check and amp draw. The capacitor should not be more than 10 percent or rating. enjoy

Posted on Nov 28, 2008

gaeb7
  • 25 Answers

SOURCE: 25 gallon air compressor wont shut off,changed air regulator

You have a valve plate problem . It could be a slipped "o" ring to a bad reed valve. There are rebuild kits for that purpose. The kits include a valve plate assembly. It covers all the bases. When you look at this area pay attention to the partitions of the head gasket/"o"ring. You may avoid the cost of the kit.

Posted on Feb 25, 2009

  • 76 Answers

SOURCE: Ingersol T30 won't shut off and blows pressure release valve

the wire juction box on your compressor has a pressure switch that may be wound in to tight take the cover off the box there should be a switch with a machine screw with nut and washer and spring back this nut off and see if that helps if you go to far you just crank it back in until the switch hit although it may be the other way around you may have to tighten to lower the pressure some of them are made that way if this does not solve your problem send me a picture of the switch and can solve it from there

Posted on Jun 26, 2009

al_kupchella
  • 843 Answers

SOURCE: why does my compreeor switch release the air after

There are two valves in play here. There is a relief valve that opens when the motor kicks off to release the pressure in the compressor itself. That is normal, and is required so that the motor can restart next time without having to overcome that pressure. The other valve is the problem. It is a reed valve between the compressor and the tank. This valve's job is to prevent the air in the tank from returning to the compressor. Think of it as a ratchet for the air. It is this reed valve that has failed.

Posted on May 27, 2010

  • 1116 Answers

SOURCE: When the unit is on

The pressure switch (on / off switch) must be adjusted or has failed. A qualified Bostitch Technician can determine if the switch can be adjusted or must be replaced. Each model is different and without the model number I cannot give you a more precise answer.

Posted on May 15, 2011

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1 Answer

25 gallon up right speedway series aircompressor leaks air out at pressure switch


This is usually indicative of a broken tank check valve. It's a valve on the pressure line from the pump to the tank. It let's air into the tank then closes so the pressure switch can bleed the air out of the pressure line and head through a plastic or copper line so the motor can restart when the pressure drops. Rarely you can remove the valve and clean the seat and valve but more often than not it has to be replaced.

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I would first find out what pressure the compressor is supposed to shut off at. If it is supposed to shut off at lets say 110 then the pop off valve is doing its job you have to reset the pressure switch so it shuts off less than 120 pounds.

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1 Answer

The compressor runs but the pressure will only build to approx twenty pounds and the compressor keeps running. I have used it many times before and had the discharge regulator set to approx 45 pounds, and...


You have either a broken reed valve on the valve plate or a broken piston ring and/or badly scored cylinder. To check: remove the head on the air pump, the valve plate is directly under the head. The reeds have to be in good condition, no breaks, cracks or bending, to work properly. If they are OK, check the cylinder, it should be very smooth. You will have to remove the piston to check the ring around it. They have a tendency to dry out and sometimes a small section will flip over backwards and will no longer seal the piston enough to compress the air. You'll have to contact Sears to see if parts are still available for this compressor.

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1 Answer

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If you have a pressure gage it would help .. if the pressure is high then there is probably an obstruction in the return pipe to the pool .. if the pressure is low then there is most likely a restriction in the supply or suction side of the pump .. this would seem more likely to me from your description, there may be something obstructing the flow into the pump, a clog, a collapse hose from the suction, some flap of pool liner .. something like that ..

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My accu-gage tire gage does not hold tire pressure reading. the dial drops slowly down to zero.


If there is a button you push to release the pressure (resetting the gage to zero), this is a valve which probably has a little piece of dirt impeding the seal of that valve. The dirt would have been carried there by the air and condensation. But don't take it apart to clean it. This is a typical problem with these kinds of gages. When you have plenty of air available (a compressor nearby) hold the gage on the valve stem, while you repeatedly push the release button. That should clear the dirt, but you may need to add more air to the tire.

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Hi sstanl, Is your pump output or flow normal back to pool? if there is no water flowing through system you will get no expulsion of air or pressure reading on gauge. If pump is working then you probably have a clogged air release valve and maybe a clogged gauge. Just remove air relief assembly from filter top, remove gauge and clear any obstructions in parts. You should easily be able to blow air thru assy with gauge removed. Teflon tape the components and snug them back in their places. restart your pump and voila! air will come out when prime is established.

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1 Answer

Air Compressor shuts off


Most compressors have a check valve installed in the tank that allows air from the compressor to enter the tank and not allow back pressure to the compressor. Also there is an unloader valve at the pressure switch that activates when the pressure switch cuts out releasing the pressure in the line. These two devices allow the compressor to start in an unloaded condition so that the motor will not strain. When you place you finger on the intake, the compressor is no longer pumping air thus there is not load on the motor. Your problem may be the intank check valve or the capacitor may be weak or bad. Simple check for both. Many volt meters have capacitor check and amp draw. The capacitor should not be more than 10 percent or rating. enjoy

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