Originally Posted by kok328
There are a few possibilities here:
1) the motor is bad
2) whatever load the motor is turning, is binding up and causing the motor to trip the thermal overload. Once the motor cools and the overload resets, the motor tries again. Check the load resistance manually.
3) a bad capacitor (if applicable)
4) you may have misplace a wire upon reassembly of the motor. perhaps wired it for alternate voltage if applicable. Does the nameplate indicate hi/low voltage wiring options?
Thanks for the reply.
1) Perhaps. But for the brief period that it DOES function, it appears to do so normally. No abnormal noise or apparent struggling.
2) I can spin the pump's shaft freely with my fingers. (The motor drives the pump.) This also happens when the motor is disconnected from all load.
3) See my question above, please. This seems most likely to me!
4) No wires were removed when I disassembled the unit. In fact, I'm not even sure it's POSSIBLE. These things are built like brick outhouses! Probably why there are no parts listed for them anywhere. :-(