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The rigid double stack air compressor fills up with air fine.When i start to use it no air pressure comes out.

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There has to be a restriction where the air leaves the compressor. Remove the supply fitting and check to make sure the hole is open into the tank. Also look to see if the fitting isn't blocked. If none of this is the case check the air line for blockage and also check to make sure there is no shut off valve in the line that isn't open.

Posted on Mar 14, 2011


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Compressor stops before building pressure

I would bypass the thermal safety and test the unit. Does it go to proper pressure? run it through two cycles. If it looks good, reconnect the temp sensor and use it until a new one can be obtained.

Sep 02, 2014 | Hitachi EC119SA Twin-Stack Air Compressor...


How to Adjust an Air Compressor Regulator

  • Plug the air compressor into the appropriate electrical socket. There are a few air compressors that come with a 4-prong electrical cord, but most of them will come equipped with a 3-prong electrical cord. The 3-prong electrical cord is set for use with a standard 110 outlet. The 4-prong electrical cord is generally used for 220 outlets.
  • Turn on the machine.
  • The air compressor should be fill completely to the range from 100 to over 200 per-square-inches, depending on the unit capacity.
  • The manufacture guide will inform you which tools can be used with the unit once it has reached full pressure.
  • The tool should be connected to the air hose and the air hose to the compressor.
  • To drop air pressure you should turn the regulator adjustment knob counterclockwise and to increase the air pressure you should turn it clockwise.

on Aug 27, 2008 | Campbell Hausfeld 04 Gallon Twin Stack...

1 Answer


Several things to check. Check amp draw with meter to make sure that the reset is not bad. It amp meter is showing low amp draw when it trips, then replace reset. If reset is good check condition of the cold start valve. The valve will not allow pressure to build until motor is at full rpm and the pump is making good pressure/volume. If cold start valve does not close, check pump for leaking or broken reed valves. If cold start valve is good, check the capacitor for at least 10 percent of rated valve. Low pressure /volume is usually leaks from tubing or leaking /broken reed valves or burned gaskets in the head of the pump. Finally, make sure that the check valve or non-return valve is not leaking pressure from the tank causing back pressure. Good luck

Mar 23, 2014 | Hitachi EC89 4 Gallon Twin Stack Air...

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I have a porter cable double stack 150psi air compressor that will run then shut off when it is suppose to but no pressure on the regulator guage and no air will come out the hose when you hook up to

Make sure the regulator is working and set to the desired pressure. There should be a knob and guage showing the pressure. It may also be a bad compressor.

Aug 03, 2012 | Porter Cable Air Tools & Compressors

1 Answer


It sounds like the sump is being pressurised,and could have a problem with piston and or rings
Also checkout that the high pressure delivery valve is operating properly


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Just aquired. Has plastic plug in oil fill oil, which blows out when compressor runs. if I tape the plug in place, the compressor runs fine. why

Check with maker but most vane type pumps the oil is under the same pressure as the tank
so you need a proper stopper !!!

Oct 22, 2010 | Ingersoll Rand DD2T2 T Win Stack Single...

2 Answers

The compressor fills up with air fine.AS i start

I would check the pressure switch. It probably has bad contacts in it. You could try to clean the contacts first before replacing the unit.

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1 Answer

Hitachi twin stack problem.

You stated that the compressor started up fine. I'll assume it reached it's max psi then cut out. Then upon reaching it's cut-in psi the motor ran slowly for a few seconds, then kicked off. I also assume you mean check valve when you refer to the non return valve.
If this sounds about right then. The first thing I would do is bleed out all the air from both the tank and the pump supply line leading from the pump head to the tank's check valve. You can do this by simply loosening the fitting that attaches the line at the head or the check valve. Once done try running the compressor again.
The purpose of this is to check the unloader valve. This valve bleeds off the pressure that remains in the compression cylinder and the supply line up to the check valve. When functioning normaly it will bleed off this pressure once the motor shuts off. If it is not working correctly then when your compressor starts back up (once it is already been filled) the piston will be working against a psi close to the max psi.

If the problem reoccurs only after the compressor has reached it's max psi, then the unloader valve is most likely the problem. If however it will not start up at all even after a complete bleed then it has to be something internal to the pump and\or motor.

Please try this and let me know (or repost) your findings.
If it's the unloader valve I should be able to explain how to repair this valve.
Good luck.

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1 Answer

Ingersoll-Rand DD2T2 air compressor

hi mate its either a fitting off the tank and it is just pumping air into the tank and out the hole or its the mpv valve this stops air in the tank bleeding back to the pump so when the pressure drops it can start other wise it wud not start as the piston is not possible to go up this is why when the compressor stops it bleeds off air in the system but to be honest i need more information to figure out what it could be e.g is it on pump unit or on tank etc

Jul 29, 2009 | Ingersoll Rand DD2T2 T Win Stack Single...

3 Answers

The air tanks fill with air, but the pressure

The regulator sounds like it is cranked closed. Try slowly operating the adjusting knob in the opposite direction. As the valve moves, you should see the pressure rise on your gauge (it probably does work).
Hope this go make something!
Best regards, --W/D--

Jul 18, 2009 | Hitachi EC12 Portable Electric 2hp Air...

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