I have an AO Smith S48B74A03 motor that I'd like to fix.
Here's the story on the motor. It was running fine on the pool but the impeller seal was bad causing a severe leak. I tore everything down and did my best to remove the old impeller from the shaft. Nothing worked. Since the motor and pump assembly was so old we decided to buy a new unit. Thanks to the excellent advice I received on this forum the new install went great and we're very happy with the result.
Since this old AO Smith motor was still in good running condition I decided to cut off the old impeller and see if I could repurpose it for something other than pool use. While I was fiddling around I noticed that there were a few dried up mini wasps nests jangling around inside the motor. Not putting much thought into it I tore the back off and removed the nests. I reassembled and put a cord on to test the motor. It ran fine but after 5-10 seconds it began to smoke. I removed power immediately.
I took it apart to see what I'd done. I had mis-assembled the centrifugal switch mechanism. The ring wasn't properly seated on the little arms so the switch couldn't trip when the motor was up to speed.
I fixed the centrifugal switch and inspected the motor. The coils look fine. The strings holding the coils look fine. The strings show no signs of burning. I reassembled everything and gave it another try.
Same thing. Starts wonderfully, gets up to speed, and smoke after 5 seconds. I immediately removed power.
My only thought is that I fried the capacitor when I ran it with the centrifugal switch mis-assembled. I think this is the cap:
Thoughts? How much is a replacement capacitor?