Another noisy AC 110 question?

[Kyle Hyde]

I have a AC 110 that is still making a lot of noise. I replaced the impeller and the impeller shaft, yet it still is making a loud vibrating noise.

I use the filter with a sand bottom, but I use a sponge pre-filter on the intake. Apparently the previous owner dropped the filter, but I was under the impression that it was magnetically driven, and had no other moving parts besides the shaft and impeller.

Any thoughts? How do I know if I put the impeller shaft in far enough?

 

[hailmike]

both my ac110s make noise when the intake is all the way to the left. one makes this weird clicking noise and the other makes a grinding. i've tried everything short of replace parts to fix it but it's just as easy to have the intake turned all the way to the right.

 

[Columbian Shark Catfish]

i replaced my 75 gallon substrate with fine, powdery, white sand, and then Zoidberg, my 7 inch pleco started digging massivly and alot of sand got sucked up into my AC 110, it's pretty noisy right now

ive washed it out and everything

 

[Leptar]

adjust the lid... make sure the lid is seated properly....
Make sure there is no junk under the impeller cover...

 

[12 Volt Man]

its probably the lid