Air compressor shutting seems like motor bogs down

3 months 2 weeks ago #1940 by Rob3700

I have a Sanborn black max compressor model number b500 BPL 60 V when I turn air compressor on it build up to about 45 PSI you can hear the motor start bogging down and then it trips The Protector motor protector if I open the valve and let it run so it does not build pressure it runs freely I checked the the valve the check valve check valve in the in the tank tank and it is working correctly do you have any solutions for this problem

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3 months 2 weeks ago #1944 by MTR-Admin

Thank you for the post!

I would check a few different things out.

You said you looked at the Check Valve, just make sure it isn't clogged with debris.

Make sure the Belt is not too tight or loose. When you press down at the center point of the Belt there should be no more than 1/2" deflection. A Belt that is too tight or loose can cause this problem.

Have your Capacitors tested on your Motor. You have two Capacitors, one is a Start cap and the other is a run cap. They may be losing "juice" so as to not provide enough energy to keep the motor turning the pump. I would have these tested by an electrician at a motor repair shop or electric supply store. You need to make sure the Motor isn't drawing too much current, so putting an amp meter on the motor or having an electrician check it out is recommended.

Lastly, you could be looking at sticking Reed Valves in the Pump, but I would check the above potential problems first.

Let me know what you find out with the above (potential) issues and we'll go from there.

- MTR

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3 months 2 weeks ago #1948 by Randyb2004

first and easiest, check voltage at the outlet. If possible check voltage with pump running.

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3 months 2 weeks ago #1961 by harleydude

Rob3700, any luck with the suggestions on your air compressor?


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