Question about Craftsman Air Tools & Compressors

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I have a 3hp 20gal sears craftsman air compressor. that starts pumping, but when it gets up to 40pounds it blows a breaker and then the motor just hums when i start it back up. but if i disconect the belt the motor will run all day.

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Don't forget the off--loader. If the pressure on the head is not relieved, it will not be able to restart.

Posted on Apr 07, 2010

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Here is the trick, you have to figure out if there is something wrong with the pump or the motor, yes the motor may still run without the belt on it just fine, but there is also no load being applied either. if the pump seems to roll over ok by hand, I would have the motor checked out by a motor shop, could be that the start switch or capacitor is at fault. once the motor checks out thenlook into the pump.

Posted on Dec 09, 2009


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