First, the reason you are having this issue is that you let the pump dry out during to off season. I know it would not seem this simple but the seals in all underwater pumps must stay wet once they have been in water or the metal shaft parts rust and prevent the pump from spinning. So going forward, get a old 5 gallon bucket, put the pump in it, and fill with water over the off season. I too leaned this the hard way.
Now for the pumps you have. With some careful disassembly, you might be able to save them. Please make sure you have unplugged the pump! Turn the pump over and remove the 6 screws holding the bottom screen and impeller on. The cover is held on by a gasket so carefully pry the over off. If you are really lucky, you will find a rock binding the pump. I know, not that easy.
Next you will see 4 screws deeper in the housing. Remove them and seperate the bottom half of the housing from the motor. Now you can see and clearly work on the removing the impeller and berring seals off the shaft.
This is where you need to be very careful to remember how all the parts go back together. You will find metal washers, rubber seals and ceramic seals. They will all seperate if you are very careful. Pry very carefully on the rubber and ceramic seals. THEY WILL BREAK and then you are done. Also, there is a spring which is not under much tension but if you are not careful, some of the parts will spring off when you get them free. If this happens, you will ask yourself, why did I not look closer at how it went together.
Maybe try the CSI approach. Take digial pictures at each step so you can have a reference.
From here, you are on your own. Clean all the rust off the parts. 600 grit sand paper will be needed to clean the motor shaft - it will be rusty and pitted. Just be careful, just take the high spots off.
So finally, here is the disclosure. Of course there must be one. I have saved my pump twice before I figured out the water in the bucket trick. When I reassemble my pump parts, I coat them in a clear silicon grease used for bicycle parts. Non of this is anything official and probably not what the company would agree to. But before you throw away another pump, it is alwasy worth a try to fix it.
We all really need to find ways to fix things before throwing them away.
Good Luck!
Next remove
Start by unscrewing that just a little and use towel/tupperware tubs and catch the water that will come out. Once all the water is out remove completly and check for a blockage
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SAME PROBLEM GONE Through THREE OF these pumps in six years. Tired of buying them
I shut the pump of for cleaning and when I turned it back on the pump wouldn't turn. I could hear it trying to run but nothing. I removed the housing to see if something was jammed but nothing.
I have the same problem. pump wont work. I hear a noise but no pumping.
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