ehurst

I have scoured the internet looking for clues on my problem. A few I tried, but nothing has resolved it. Here is my issue: I discovered my pump/motor has not been running for a couple days and the house breaker was tripped. I reset the breaker and turned the pump on. It sounded "strained" once water was sucked into the pump. It actually slowed the motor. The motor is just over a year old and is a Marathon Electric C1306, single speed, 1HP, 115/230 Volts. Here is what I have done so far: 1. Made sure all filter baskets were clean. 2. Made sure impeller was clean. 3. Replaced the capacitor on the motor (assuming is was the start capacitor since it is the only one and had a low farad rating) 4. Replaced the shaft seal ensuring it was installed correctly. 5. Replaced the house breaker to be safe (old house so it needed to done anyways). 6. Verified the voltage going into the motor (115 volts), it also checked it at the timer box. As for right now it primes just fine and water flows and the motor seems to run good, but once all air is out the motor sounds like it kicks/slows down and after a few minutes it shuts off. Assuming the motor internal circuit breaker trips because the house breaker no longer trips. When it does run I am getting between 5-7 psi. There is only air after I open the the pump basket lid, there is no air in the system otherwise and the motor runs slow. Here are my questions: 1. The motor has 3 leads; 1 ground and 2 power, what should the voltage be for each power lead? How do I truly test it? 2. The impeller and diffuser both look okay, they are older but don't look damaged. Could they still be the issue? 3. The motor does not make noise that bearings going out, but could it be bearing related? 4. Is the motor bad? 5. Could the timer be bad? Since the motor seems to run good until under a load, I am confused. I am tying to narrow it down to see I need to call a pool company, and electrician, or if this is something I could handle. I thought about replacing the pump, but don't want to waste my money right now if it is the motor.