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Air compressor stalls when using tools after keep starting it

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I have a LeRoy older model pull-behind air compressor. When it starts up it low idles but shuts off before it builds pressure. I have all the valves open I have low in pressure but the motor keeps dying. I...

I'm not familiar with that model air compressor, I'm assuming this is a rotary screw driven by a gas or Diesel engine? If the inlet valve is open & the air compressor is attempting to compress air while the engine is starting up, it can be too large of a load for the engine to continue running. I would be checking to make sure I followed all the steps of the mfg start up procedure. If you had a reciprocating air compressor driven by an electric motor and the check valve or unloader valve fails and there is air pressure coming backwards thru the piping against the valves, the actual compressor itself becomes too hard for the electric motor to turn over. The amp draw is so large it causes the breaker to trip. In your case you probably don't have any back pressure coming from other machines making it hard to start but if the inlet valve on the air end is open it could have the same effect. If there is zero pressure in the machine and you start the engine. Everything is going to rotate. The inlet valve for the compressor has to be shut somehow to prevent the compressor from compressing air. If it's open, air will be drawn into the air end, the more the engine runs the more the air end will compress the air. As the internal pressure rises, the air end becomes harder and harder to turn which causes the engine to strain. That's a complete shot in the dark. There are many ways air compressors are controlled. There are many types of air compressors. It could be a problem with the engine itself. The bottom line is that you need to be able to know the air compressor is unloaded and not trying to compress air. If it is unloaded the engine should start up and run.

Dec 16, 2017 | Air Tools & Compressors

1 Answer

What oil do I use for a G Force 2 HP air compressor, model 50622

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  • May 17, 2016 | Air Tools & Compressors

    1 Answer

    Portable generator stalls when load applied

    Connect the air compressor to house plug and check amp draw with tester. More than likely you will find that the initial start amp load is too great for the generator. Do not rely on the information stated on the compressor. Generators and air compressors do not get along. At our repair shop, we find that most contractor /construction type generators that were used for running air compressors had failed or leaking capacitors and were not producing correct amount of power. You could have gen set with weakened capacity and air compressor that is drawing more than stated on plate. Good luck

    Mar 08, 2013 | Hammering

    1 Answer

    My air compressor starts right up, runs for approximately a minute, then quits. If left sitting for a minute or two, it will start again, and run for a minute, then stop. If you shut the fuel off, it...

    It sounds like the compressor is reaching the max psi it can hold. At this point can you use a air tool or blower? The reason it comes back on is to keep the psi at running level. It replentishes the lost or used air.

    Good luck!


    Mar 31, 2011 | Honda Air Tools & Compressors

    2 Answers

    Battery died after 6 years on my 2004 trailblazer, no problems at all up until this time....tried using the air conditioner and the rpm s dropped and car stalled, happens every time, also when i turn n the...


    Jan 08, 2011 | 2004 Chevrolet TrailBlazer

    1 Answer

    Compressor builds up air, but when i go to use tools looses pressure to point that its not usable.

    how big is the compressor? if its only say 3 cubic foot a minuet that is at free air pressure not at say 8 bar,,,at 8 bar it would only be 0.375 cubic foot,, check to see how much air in cubic feet per minuet and at what pressure your tools need to work on
    if they say 5 cubic feet at 8 bar and the compressor is only 3 cubic feet at 8 bar the tool will only run for a very short time before the compressor air tank has run out of air and the compressor cant keep up with the demand from the tool
    the bigger the compressor and the bigger the air tank the better some times,,,for a hammer tool you need 8 cubic foot at 10 bar
    thats a big compressor!! or a small one for only a short burst of time,,, in short,,,all ways go for a big un? compressor that is!!
    i hope this has helped you out

    Aug 26, 2010 | Hitachi EC12 Portable Electric 2hp Air...

    2 Answers

    The compressor turned on pumped up and shut off and wont start up

    Inccrease the line pressure to 90 PSI, a air ratchet is a very high volume air tool and the compressor may not be able to keep up with it.

    Jul 14, 2010 | Craftsman 3 gal. Air Compressor, 1.5 hp,...

    1 Answer

    Air Compressor stalls when it reaches @ 40psi. Have a

    You need to find an amp probe from someone and use it to monitor the amps as the compressor is building up pressure. If the amps start increasing dramatically as it nears the stall point it would seem that you have a seizing problem or electrical motor problem. This answer only applies to the exact statement that you gave. ( Air Compressor stalls when it ). Mike

    Oct 25, 2009 | Air Tools & Compressors

    1 Answer

    2-stage air compressor's recovery time takes twice as long

    hi is your machine reaching full pressure? if so maybe your problem is with your tool?

    Mar 23, 2009 | Air Tools & Compressors

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