Question about Air Tools & Compressors

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How to check an air compressor

I start it up and let the tank fill, I hook up the hose and it doesn't release any air.

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  • Contributor
  • 18 Answers

YOu need to plug in an air using attachment tool and then pull the trigger

Posted on Jan 05, 2013

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6ya6ya
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Posted on Jan 02, 2017

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mrhappyface
  • 205 Answers

SOURCE: air compressor fills, but slows down as the pressure builds

sounds like you need a new check valve which should be somewhere between the compressor outlet piping,tubing,etc and the tank which prevents the air in tank to back feed to the compressor which would cause hard starting and could damage the motor easy way to check is when you shut off the compressor with some air in the tank if the check valve is bad it would continue to bleed air out out the unloader valve .the unloader valve on your unit is most likely part of the pressure switch when the unit shuts of it should only bleed down the pressure in the pump so it would make it easy to start when needed hope i didn't confuse you

Posted on Mar 23, 2009

  • 2 Answers

SOURCE: craftsman 1 gallon direct drive oil filled wont build air pressure

It sounds like you may have a broken reed on the diaphragm plate. This is located at the block. Remove the cover, and look for a cast metal assembly with fins. It will be attached to the side.

Posted on Apr 23, 2009

  • 5 Answers

SOURCE: how long should it take to fill up 80 gal tank

10 to 13 minutes from 0 psi to max and auto-shutoff. Tank will be extremely hot, also. Hope this helps!

Posted on Jul 15, 2009

ollie reece
  • 1167 Answers

SOURCE: Compressor tank will not fill with air

piston rings gone valves stuck inside nonreturn valve jammed the pipe coming from the pump unit into the tank before it goes into the tank it goes to a gold valve you need to take this out and check the rubber and spring if the seem ok turn it around and put back in then get back to me buddy

Posted on Sep 16, 2009

SOURCE: I have a Craftsman 3 gallon 1HP air compressor

Sounds like the compressor has failed -- probably the valve -- tear down and rebuild is probably the solution, or replace compressor, or just buy another unit. My nature would be to tear it down and see what's going on.

Posted on Mar 23, 2010

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2 Answers

How can i fix my ec12 hitachi electric air compressor


This problem is caused by either the starter capacitor or the in-tank check valve. Ez to check. With no air in tank, start compressor; if motor hums or has difficulty suspect capacitor. If motor starts, partially fill tank and unplug the power. Check for air leaking at the pressure switch or air coming out of the air inlet (remove the air filter). If air leaking, replace check valve. If no air leaking, again let out all the from the tank and connect power. Allow the compressor to fill and shut-off. After the compressor fills, again listen for air leaking from the pressure switch unloader valve. If air continues to leak from unloader, replace the check valve. Good luck

Jun 11, 2015 | Hitachi EC12 Portable Electric 2hp Air...

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My 15 HP Ingersoll Rand Air Compressor doesn't start at times due to some load. Heard that there is some air getting caught in the Piston Head post its cut off point and hence there is too much


These pumps have unloaders to help the motor from being overloaded at startup, one type is centrifugal that is built to work off the crank, the other can be a pressure release valve that is set up to release the pressure in the chamber after it shuts down after full pump up. This is typically head as air escaping right after the compressor stops running after a complete fill.

Here is more information on the pressure release unloader.

http://www.about-air-compressors.com/unloadervalve.html

Good Luck,

Brian

Sep 05, 2012 | Ingersoll Rand Air Tools & Compressors

1 Answer

Tank isn't filling up


Make sure your hose doesn't have any leaks. Also, check the check valve for dirt or wear. Your pressure regulator could also be stuck in the blow off position.

Feb 02, 2012 | Porter Cable C2002 150 Psi 6 Gal...

1 Answer

Campbell hausfield air compressor, model wl600602AJ fills tank just fine but when it calls for more air it blows breaker its on a 15 amp would i need to be on a 20 ??


your check valve is probably bad, the one that hookes to small tube that goes from tank to cylinder, what this does is lets the cylinder of pump fill with air and then when it calls for air and tries to start pump, it can't because it is air locked, had this happen before, I picked one up at curb someone was throwing out cause they thought it had an electrical problem, took it home and ran it checked it out and found this check valve to be defective,worn out. Good Luck

Aug 24, 2011 | Garden

1 Answer

I can't get the hose to connect to the compressor.


after scewing the fittings on hose & compressor with thead tape (ofcourse) ,simply pull the collar back on the female fitting & incert the male fitting & release the collar .----------these may be called quick connectors but they require a little effert under air pressure.

Jun 03, 2011 | Craftsman 3 gal. Air Compressor, 1 hp,...

1 Answer

I just put a new pressure switch on but when i fill the tanks the compressor wants to empty the air and it tries to kick back on to fill back up with air and some times it kicks and drawls a load on the...


Air leaking from tank back into compessor is indication that in-tank check valve is leaking. This condition will stress motor when trying to start. Test : With air in tank, unplug compressor from outlet and remove hose from compressor at checkvalve and test for leak (soapy water). If leaking drain air and remove checkvalve. Examine checkvalve for debris under seat (resurface seat or replace valve). Parts are at www.toolpartsdirect.com Good luck

Mar 10, 2011 | Hitachi EC12 145 amp 2Horsepower 4Gallon...

1 Answer

My compressor builds to 125 psi then shuts off like it should then when the pressure is released the compressor wont start back up. Sometimes it will attempt to start and it sounds like the motor is...


When a compressor reaches set pressure, there should be a release of air from discharge hose thru the unloader. This release of air unloads the compressor head pressure. The unloader is usually located within the pressure switch. Easy to check. Follow discharge hose from compressor head to tank. There should be a brass/steel checkvalve at the tank. The checkvalve allows air to enter tank, however not allow air to be released back into discharge hose. If this valve is leaking, air will be released from the unloader constantly. Follow 1/4" tubing from checkvalve to unloader and listen for leaks. Repair as needed. If air is not leaking from checkvalve then check unloader mechanism with-in pressure switch. Parts are available at www.toolpartsdirect.com Good luck

Aug 25, 2010 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

1 Answer

Single cylinder/oil free 5.5hp 30gal will fill tank when started with tank empty. When tank pressure is bleed off motor attempts to start, humms and kicks breaker.


If the unloader is not working properly the motor cannot overcome the head pressure. Two things to check. Make sure tank check valve is not leaking. Easy test. With pressure in tank, unplug the compressor from outlet and remove discharge hose at tank and listen for leak or spray soapy water. If leaking replace valve or try to clean debris from valve seat. If not leaking then problem is most likely at pressure switch unloader valve. Follow 1/4 inch hose from checkvalve at tank to connection at pressure switch. When pressure switch reaches cutoff pressure the switch opens the contacts and moves small tang against valve stem to release air from discharge hose. Check for proper function and repair as needed. Good luck.

Aug 18, 2010 | Craftsman Air Tools & Compressors

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