Air compressor problem

Discussion in 'Mechanic and Repair' started by eZrider, Aug 1, 2007.

  1. eZrider

    eZrider LawnSite Member
    from Georgia
    Messages: 25

    I know it's not lawn equipment but figured I would ask. I have a small Craftsman air compressor that just quit running. When I flip the switch it just buzzes and I get a puff of smoke out of the motor housing.

    I took the cover off and released the pressure from the tank. With the pressure off I can manually spin the motor over and it will start up and run until it reaches pressure but will not start back up automatically.

    Any ideas? Is the start capacitor bad?
  2. twj721

    twj721 LawnSite Senior Member
    Messages: 619

    sounds like your CAPACITOR START MOTOR has gone out
  3. General Landscaping

    General Landscaping LawnSite Senior Member
    Messages: 801

    It would help to know what type you have.
    My belt drive unit had that problem..... traced it back to a bad check valve.
    The compressor head would not unload after shutdown, it was trying to start with full pressure in the cylinders.
  4. eZrider

    eZrider LawnSite Member
    from Georgia
    Messages: 25

  5. John Stiles

    John Stiles LawnSite Member
    Messages: 42

    You may have burnt the start coil in the motor[smoke]it sounds like a start capacitor, but it may also have a centrifical controlled switch that changes from start coil to run coil after the speed of the motor is such that the C-force slings the weight outwards allowing the switch to operate. Any way you go, the smoke is a bad sign that the coils of wire in the motor field superheated enough to probly need a new motor. I hope I'm wrong!`john

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