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5hp 230v Sanborn Magna Force (believe model 040-0205) keeps junking motors (i.e. they slow, hum, throw breaker, then "click" and won't start again). Been through 3 Marathon 5 hps in 2 months. Many now saying I have a different problem than trash motors, like bad unloader valve, etc. leaving too much pressure for start-up. "Sanborn" says not using an OEM motor and that a 5hp Marathon is underpowered and is likely the problem (I'm not buying it) - they also say it could be a head gasket, yadda... yadda. I can't figure out how to DIAGNOSE the problem without replacing every pricey part one-by-one until something works. Any suggestions? Many Thanks

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Posted on Jan 02, 2017

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SOURCE: Campbell Hausfeld compresser throwing breaker

There is a one way valve that only lets air from compressor to tank. If this isn't working the motor is trying to start under the pressure of the tank, and therefore tripping your breaker.

Posted on Nov 30, 2008

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SOURCE: My Sears 1 HP compressor motor starts to slow down

IF IT HAS BELTS THE BELTS COULD HAVE BEEN LOOSE AND SLIPPING.. MOTOR COULD BE GETTING HOT DUE TO TOO SMALL OF CORD OR SMALL GAUGE DROPCORD. INTANK CHECK VALVE COULD BE GETTING CLOGGED NOT ALLOWING AIR TO PASS THRU IT. UNHOOK DISCHARGE LINE FROM HEAD TO THE TANK, THIS WILL ALLOW PUMP TO RUN UNDER NO STRESS AND SEE WHAT HAPPENS.

Posted on Apr 03, 2009

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SOURCE: I have a sanborn magna

The web address below will provide you with the information necessary to order a belt for your compressor. Check the model number first however to insure correct part.
http://www.mastertoolrepair.com/165tgc51b850tgb8p165tg51h850tgh8p-p-1454.html

I have replace the V belt on my compressor with an automotive type belt to save money (and better quality). I used a tape measure around both pulleys to get the length. Check the motor/compressor for adjustability as this will help when tightening the belt. If the motor/pump is already positioned all the way out, re-adjust to closed position and remeasure. Now for width of the belt; automotive belts are sold by length and width and use a common numbering system of five digits. The first two numbers printed on the belt refer to the width and the last three refer to length. Measure the width of the pulley grove. My pulley measured about 1/2" . Auto belts were available in 13/16", 15/16" and 17/16" widths. These belts are marked with first two numbers as 13 or 15 or 17. Next use the measurement around the two pulleys. My compressor measured 47 inches around the pulleys. So the automotive belt number for my compressor is 15470. If the measurement around the pulleys was 471/2" then the belt number would have been 15475. The last number refers to 1/2" either a (0) or a (5) Most autopart stores will ask you for the year and model of car for your belt but ask to see the belts with tape measure in hand and check for size using the numbering system for a guide. If your compressor uses a flat style belt you can buy from www.grainger.com. Measure around the pulleys the same way for length. Good Luck with your project.

Posted on Apr 13, 2009

  • 67 Answers

SOURCE: Electric Air compressor just hums then trips breaker.

usally there is a releaf valve that takes the pressure off the compressor while it is resting. If that pressure is not off when the drive piston starts the motor will overload and blow the the breaker or reset. Check for a releaf valve for when the unit has reached full pressure

Posted on Jun 16, 2009

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SOURCE: I just hooked up a

Hi, my name is John. Welcome to FixYa. Make sure you are correct in the wiring of that, double check that you are right. Thanks for choosing FixYa....John

Posted on Nov 23, 2010

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