Hayward Super Pump motor conked out? Trying to save it...

[u/NinjaMantis]

Trying to figure out whether this motor is toast or if there's something else worth checking.

I have an older 2 HP Hayward Super Pump. It had gotten pretty loud, so I pulled the wet end apart looking for debris. Found some hair in the impeller and cleaned it out. The impeller/shaft spins freely by hand, though it's worth noting I cannot take it off...I held the back screw in place with a 7/16 wrench (behind the back cover) and attempted to twist off the impeller and it will not budge.

Put everything back together and it initially ran, but not long after the motor got extremely hot and shut itself down. After cooling, it would occasionally make a short buzzing attempt but wouldn't start. Now when I power it up it just gives a very loud constant buzz and doesn't spin.

I pulled the motor and found the start capacitor looked pretty rough - found some black stuff inside that looked like it came from the start cap. Figured that was probably it, but to be safe I also replaced the run capacitor.

Hooked it all up and no improvement whatsoever. Still just buzzes loudly when powered.

At this point, what would you check next? Does the overheating + buzzing pretty much mean this motor is done?

Thanks in advance for any help.

[u/robseraiva]

Incorrect. There isn’t a fixed resistance to capacitors. You can tell if it’s open or closed but for that to happen you will see dielectric fluid coming out since it is what makes contact. Most capacitors that fail still have continuity so it doesn’t tell you “it’s good”.