919.165310 tripping ckt breaker after inital start up?

by Charlie Phillip
(North Charleston, SC)

Craftsman 919.165310 compressor parts (courtesy of www.searspartsdirect.com)

Craftsman 919.165310 compressor parts (courtesy of www.searspartsdirect.com)

Keeps tripping ckt breaker after inital start up?


Hello, I have a Craftsman model #919165310 which I have been trouble shooting for several weeks because it trips the 20A breaker during a restart after inital start up.

Prior to this problem, there had been no issue with the circuit the compressor is plugged into nor am I using an extention cord. I have also plugged into different circuits with the same affect.

I have replaced the check valve as well as the pressure switch. The compressor will start up with no problem when the tank is empty or when the line going to the unloader valve is disconnected.

I have also run the motor after decoupling from the pump and it starts and runs with no issue.

I have also attempted to restart the motor with a partial charge on the tank by disconnecting the unloader from the pressure switch and manually dumping the unloader valve.

When doing this, the motor will not start constantly. At this point, I am certain the unloader valve works as designed as I can hear it release once the tank is filled and the motor stops which verifies the pressure switch and check valve are good.

The only other thing I can think of is the starting capacitor, I would appreciate any ideas.
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Charlie, excellent post with lots of good info. Thanks for taking the time to add the details.

When you say... "The only other thing I can think of is the starting capacitor" that, as far as I'm concerned, is your compressor problem.

I uploaded the parts schematic for your Craftsman compressor, and you can see the motor has a start and run capacitor. Check them both.

See the page on this site for help in how to test an electric motor capacitor.

Cheers,

Bill


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Compressor blows fuses when trying to start

by Dan
(Gloversville,NY)

When turning compressor on no pressure in tank the circuit breaker trips. Have used the same circuit several times in the past with out issue. removed pressure switch cover, and checked switch contacts ,no evidence of arcing.Removed motor cover able to spin motor over by hand , no binding or drag, was wondering if capacitor on motor could be cause of no start issue?
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Possibly, Dan. See the page on this site about how to check your caps.

Bill

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