Dayton Motor will not start only hums

by Michael
(Arkansas)

The problem is with the electric motor. The motor is a Dayton. It is a capacitor start farm duty motor.

Model #-6K727N HP-1 RPM-1725 Volt-115/230

Another number on the top is LR24684
MTR REF-R602212N. Okay now let me tell you what I have done. I have replaced the capacitor already, that seemed to do nothing so I put the old one back one but I still have the replacement.

The only way I can get the motor to run is if I rap a rope around the pulley, turn on the motor, and pull the rope hard. You can not start it by spinning the pulley by hand.

Also if I leave it on for a couple seconds without it spinning the electrical connections start to smoke and I trip a breaker.

I believe I can fix this myself without having to pay someone else to do it but I need some help.

Trying to save money so please help!!

_____________________
Bill says...

Michael, good post. Thanks for the info.

My thoughts are these. First, is the power supply to the compressor clean? No extension cords, nothing else pulling power from the circuit at the same time as the compressor is trying to start?

Then, are you having these symptoms with air in the tank? If so, please dump all the air from the compressor tank and try to start it. Any change?

Please post a comment here.

Thanks,

Bill




Comments for
Dayton Motor will not start only hums

Click here to add your own comments

Jan 10, 2012
 motor will not start
by: Buster

Hey Michael, back to your original post, it is a well known fact that all electrical components run on smoke, and if you let it out, that is bad. haha. I don't know if you have an ohm meter, resistance tester, or not, but the next step would be to check the start circuit for continuity, through the start contacts and the start winding in the motor. Look at the windings and smell, good indicator of burnt windings. If they are black and the varnish is burnt off, good indication the smoke has escaped. From your description, seems like the run winding is still ok, but the start has an open circuit somewhere. I wish I could see it, that would help a lot.
Buster in L.A. (Lower Arkansas),
Jan 09, 2012
 motor will not start
by: Buster

I think you are on the right track with changeing the capacitor. When changing the cap did not work, the next thing I would suspect would be the centrifugal switch inside the motor, the switch makes a clicking sound as the motor speeds up and slows down, takes the capacitor and start windings out of the circuit when it gets up to speed. Check the wiring from the capacitor that goes down inside the motor and connects to the switch contacts. If that looks ok, check the wiring that connects to the motor winding itself. There is a seperate winding in the motor that starts it, pulls high current, then drops out of the circuit when the centrifugal switch reaches speed. Hope this helps.

_______________

Thanks Buster, B.
Jan 09, 2012
 Still Nothing
by: Michael

There is no extension cord being used. It is plugged directly into the wall. Also there is no air in the tank because I have taken the motor off of the tank. There is no pressure switch hooked up, no pressure against the pulley, and still nothing. I am at a loss.
Jan 09, 2012
 Effort #2
by: Michael

No there is no extension cord in between. Also no there is no air. The motor is off of the tank. I took the motor apart and noticed that a wire that runs from the capicator to the fan was cut in half. It looks like the fan had been rubbing it for a couple years. I replaced that wire and still the same problem persist.

Click here to add your own comments

Join in and write your own page! It's easy to do. How?
Simply click here to return to Compressor Will Not Start