Well.....
It seems we are going through macerators every 8 years because my replacement needed replacing. Interesting that this time, when I removed the tired one which had been running sluggish, there was a huge ball of hair wrapped all over the macerator blades. I was going to clean it up and put it back into service, but the blades fell off when removing the hair ball. The rotor and blades are made of stainless steel, but the end of the motor's rotor had disintigrated, apparently poor quality stainless.
I replaced my 2nd macerator with
THIS ONE, my 3rd, at a price of $52.
I followed the same procedure as before, swapping the end portion. This time I gently clamped the macerator vertical in my vise (with wood in between) as not to disturb the gaskets and steel plates of the pump portion which made the swap go very quickly.
Also, like before, I drilled a hole in the end of the plastic motor housing to have access to the motor's rotor so I can spin it by hand with a screwdriver, in an emergency to unjamb it if required. I stick on a round rubber pad to cover the drilled hole.
Replacing the macerator on our PC is very easy. The hardest part which was not very hard, was the wiring. When doing this project yourself, first test power and ground to make sure the pump is spinning in the right direction. That got me 8 years ago because the color of the wires coming from our PC are backwords. Black is power, color is ground.