Question about Black Bull Air Tools & Compressors

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My Black bull 4 gallon 5.0 CFM 2 HP air compressor will not start. Regardless of whether the on or off position is selected, all I get is a humming sound for about 2 seconds, then it goes silent. After a moment, the humming starts up and stops again. The startup was attempted at 50 degrees F., no extension cord, oil level at proper level. The unit is only 1 year old and only used three or four times to inflate tires. Solution?

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I need the diaphram in the On/Off pressure switch on a Black Bull- 4 Gal., 2 HP, 5.0 cfm @ 90 PSI 120 v /13.8 amp . Batch # 0911. These are the only # I can find

Posted on Apr 14, 2016

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Posted on Jan 02, 2017

virgils
  • 39 Answers

SOURCE: craftsman air compressor, oil build up in the air line

worn compressor rings, not a real issue, I assume it is more of a build up over time, say a gram of oil is blown into the lines every year, well one gram would not be noticed nor two but since it soes not evaporate it builds up to the point that you can see it, some oil is blown by brand new compressors and over time gets to be more and more, but as long as you are still getting full pressure you do not have to service the compressor, but since this is being used on water pipes I would install a trap inline to catch the oil

Posted on Oct 13, 2008

  • 2 Answers

SOURCE: Sears Craftsman 3-Gallon, 1.5 HP Air Compressor Hums

YES IT MAY BE THE CAPACITOR . IT COULD ALSO BE THE WIREING IN THE MTR, THE PUNP ITSELF.

Posted on Nov 26, 2008

  • 47 Answers

SOURCE: Husky 1.5 HP 6 gallon compressor motor runs but

Your manual pressure release valve might be stuck open or blocked open by some debree. It should have a steel pull ring on the end of it. Exercise it and try running it again. Also the pressure regulator adjustment might have been backed off to zero. Crank it clockwise and see if this helps. Check the air output lines from the compressor to the tank for leaks.

Posted on Jun 22, 2009

Milrite
  • 79 Answers

SOURCE: air compressor struggles to start but eventually starts

If the proplem only happens after the initial start-up with the tank empty, then your back flow valve is sticking and preventing the compressor from kicking over imediately. If it does it all the time, even when the tanik is empty, then your capacitor on the motor is not charging correctly.

Posted on Jan 17, 2010

  • 36 Answers

SOURCE: Compressor will not run

could be the capacitor, also try looking at the wires around the windings

Posted on Jul 30, 2010

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