Craftsman 33gallon vertical compressor dragging on start

by Emilio Cavazos
(La Vernia, tx)

Craftsman 33 gallon vertical compressor

Craftsman 33 gallon vertical compressor

When I turn on the compressor it sounds like it is dragging and then within 5 seconds the breaker blows.


i have already replaced the starter capacitor, but that didn't work.
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I always test the unloader valve before assuming something in an air compressor start circuit has failed, Emilio.

As a comment here, please tell me if the compressor will start OK when the tank has no air at all? If so, let the compressor run up to cut out, and monitor the unloader valve to make sure it does its job.

If the unloader valve works, as a comment, tell me how you are getting power to the compressor.

Cheers,

Bill

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Craftsman 33 Gal, Upright compressor blows breaker

by Joe
(SC)

Craftsman 33 gallon air compressor (Photo: www.sears.com)

Craftsman 33 gallon air compressor (Photo: www.sears.com)

Hello, I have a few year old Craftsman 33 gal upright compressor that just started blowing the 15A circuit breaker when it initially starts up whether I flip the switch of if it comes on automatically. If I reset the breaker, it runs no problem and will run until the tank is up to pressure and the unit kicks off. Then once it tries to restart it trips the breaker again. Any ideas?
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Hello Joe.

As a comment here, after you get the Craftsman compressor running, and it reaches the cut out pressure and stops, does the unloader valve work?

Cheers,

Bill

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80 gal 5hp craftsman oil appears to have water in it and looks milky

as titled I got this compressor basically new although used . It had very low hours and was said to have been broken in per the manual. When I got it I drained the oil which looked a little dark. I put in the recommended craftsman brand oil. I have run time of about 20 hours and I'm noticing in the sight glass the oil appears to have water in it and looks milky. What should Iiinspect and do ? Email mas2868@yahoo.com
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If you are having water in the sump oil, it could simply be condensate from ambient air. Hot, humid air outside, compressor pump and sump cold equals water condensing.

If there is lots of water, you may have a leak past the cylinder seal(s) allowing compressed air (high source of water vapor and water) into the sump where the water vapor condenses.

Bill

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