Need help-pump motor stopping...

[fission7x]

Pump motor will run for a few minutes and then one click is heard and pump volume drops, about 30 seconds later another click is heard and the pump stops pumping altogether. I think the motor's thermal overloads are tripping, first one and then the other, but I'm not sure. Breaker is not tripping. About 5 minutes later, the pump starts back on its own and then repeats the tripping cycle. It will pump water when it's running, so I don't think the suction side is clogged.

Also, do y'all have any idea what pump and motor is this? The name plate is now worse than it looks in this photo and no info is discernible (rusted away).

Thanks in advance!