Overheating pump

[Dazureus]

I'm having a pump problem and I'm hoping someone can give me advise about it. Every so often (random) my Quiet One pump stops functioing. During this time, the casing is very hot to the touch and to remedy the problem, I have to remove the pump from the system, take off the face and turn the impeller by hand. It seems like the pump is overheating for some reason and the impeller shaft is expanding and siezing up. During normal operations, the pump casing is uncomfortable to touch, but not burning. I've tried installing fans to cool the pump but it hasn't seemed to help. I did aquire the pump from a friend so I don't know how old it really is. I'm pretty sure there isn't anything I can do to help out this pump so my questions are this: Is this common to Quiet Ones? In other words, if I get a new one, will I see this problem. Also, my manifold system is pretty elaborate and might produce more backpressure than what people normally use. Could this be putting undo stress on the pump? Thanks for all replies.

[Ltspd]

Ok, I dont know much about QO pumps, not sure how they are built. Are they a wet system similar to a mag?

Here is my suggestion. I would tear the pump down and soak the imprellar, head, and all the water contact parts in a muratic acid bath. About 1/4 cup per gallon of water. I use this to clean the beckett injectors and various other calicified things like pump stuff. It may be that they are dirty and this will clean them.

Does the pump require oil?

You may have to much back pressure and you are causing the pump to overheat? Not sure.

Hopefully somthing I suggested will help.

It may be time for a new pump

[golfish]

Yeah, I agree with Paul (again) If you don't have muratic acid, Vinegar will work almost as good.

[Dazureus]

Thanks for the suggestions. The Quiet One seems to be a direct drive pump as I can't see the magnet attached to the impeller. Because of that, I'm not sure if I can take it apart. I can try to soak what I can see, but it's not very much. I'm sure there's some way to take it apart, but I haven't done it before. Maybe I'll pick up a new pump and fix this one so I can have a spare. Thanks again

[golfish]

The best way might be to make a few short pipes and have it recirculate the muratic acid or vinegar in a 5 gal pail....