While I was on the RV trek, my son called to let me know that the pool pump quit. When I got home yesterday, it was the 1st thing I looked at. Nope, need a new pump. Just paid close to $1,500 (part+labor) to have a new one installed, as I would only save $100 to do it myself.
I replaced mine this spring. It had started to make some higher pitched squealy noises when it was cold. Also had a little intermittent leak between pump plate and pump body. I figured the output shaft bearing of the motor had worn enough to allow the impeller to rub against the bronze wear ring in the snout of the pump diffuser. Yup. Had small cracks in the impeller and the diffuser too, but nothing broken. Left-hand copper screw in the shaft end was about gone, ate away.
Sta-Rite Max-E-Glas. Parts available, though not a shaft seal for my old original style pump plate. Could not find a graphite shaft seal set that would for-sure work with the old plate. Sta-Rites solution is to replace the pump plate with the newer design, and a seal to fit that. New plate was $80. And new shaft seal, new impeller and diffuser, a brass specialty LH-thread screw, a couple O-rings, and a new motor. I think about $350 or so in parts.
I thought about replacing the motor bearings myself, but had a major problem - 4 long thin steel screws, like #8 and maybe 12" long, hold the motor end caps and shell together. At the motor's pump end, they thread into blind holes in the square end cap which is made of zinc. They were seized good. No way to get at them to try to use penetrant. Snapped real easy with the long thin screws. So New motor.
Old plastic motor base was broken too, and not one that was listed with the pump setup. Luckily was able to find a Sta-Rite part # on the base, it was a low-profile base for a spa motor. Was able to order up a new one still.
If I ever have to replace the whole pump (housing with hair & lint pot), it will be a total cut out and start over 2" PVC job as there isn't room to cut and add a coupling everywhere. Lots of Tees, valves, backwash valve, etc. all solvent welded together, relatively tight spacing.