Official: Masterflex Calcium Reactor Setup Thread

[rovster]

Is there anything that can be done about quieting a pump. Just got one and has a loud electrical hum, kind of like a messed up fan motor. It works fine but it considerably louder than my MP40s. There is no grinding noises just a low frequency hum. Pump is in great shape inside and out but have not opened motor yet. Cole palmer does not support this model any more so they were no help.

[vhuang168]

What is the model? Some are brushless and are super quiet. Some are brushed and depending on the condition of the brushes, can get pretty loud.


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[rovster]

Originally Posted by vhuang168

What is the model? Some are brushless and are super quiet. Some are brushed and depending on the condition of the brushes, can get pretty loud.


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7524-40. I'm assuming this is a brushed model. That said, the Cole Palmer rep heard it over the phone and said it was typically an electrical issue? Like I said is a low frequency hum, not a grinding or squeaky noise at all. I've read some people clean the brushes or replace them, but CP says they no longer support this model. It looks literally brand new, even the insides are pristine. Is there anything that could be lubricated or greased? I did expect some level of noise, but this is a bit more than I had hoped for. I'm waiting to set it up until I figure this noise thing out. I know I've read of some on this thread going in there and improving it. I don't expect it to be dead silent, but this is just a little too much since tank in in a living area, and no basements in FL, LOL! Thanks a lot!

[vhuang168]

I honestly think that is how it's going to sound like. There is a YouTube video comparing a brushed version vs a brushless. Maybe you can look it up and see if that's how yours' sounds like.


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[rovster]

Going to upload a video soon. We'll see. Thanks for your help.

[Bpb]

Rovster. I have the exact same model and my experience is the same. Not so much a squeaking (which would indicate brush wear), or a grinding, rattling, or clicking. It's nothing mechanical in nature. Just a loud 60hz typical AC electronic hum. Same pitch and sound of an old street lamp, a refrigerator, old loud aquarium air pump, dryer, old noisy mag drive pump, ect. Just that electrical hum, but it's VERY loud. Louder than any single noise source in the entire house. It's only not noticeable when the ATI fans are running, tv is on, box fan running, dishwasher going, all at once. Then it's not noticeable. But it's such a resonant hum I can hear it from any room in the house, with doors shut. I have mine wrapped in towels inside an equipment cabinet, and found the hum is slightly lessened if I elevate one side slightly. Seems to throw off the frequency a little and it's not as loud. Wish I were of more help. I've debated running longer water lines through the wall and putting it inside a closet in another room adjacent to the tank


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[Bpb]

On YouTube video comparisons I hear that same hum coming from the brushless models. I don't think the hum is a result of brushes


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[Tinkanator2000]

Originally Posted by rovster

Going to upload a video soon. We'll see. Thanks for your help.

Replace the brushes:

http://www.coleparmer.com/Product/Br...es/EW-07520-04

Manual located here:

http://www.coleparmer.com/Assets/man...-1299-0725.pdf

[rovster]

Here you go! Any opinions after hearing this?



After listening myself, its much more audible in person but you can hear the low pitched hum in the background. Aplify that a few times and that's what it sounds like in real life, LOL! If this is "normal" then I would be satisfied with that. If there is anything that I can do and or should do, then I will. Thanks guys for all your help!

[Bpb]

Yep. Same sound as mine


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[Haksar]

Typical brush model noise , have the same on my 7523-40 too. Earlier had some squeaking noise and it cleared up after spraying wd 40.

[rovster]

OK, its REALLY loud, video doesn't do the low frequency justice. Where would you spray the WD40? Should I pull the motor apart? Don't want to make things worse. I thought like a bearing grease would be better than WD40. Thanks.

[vhuang168]

Originally Posted by Bpb

On YouTube video comparisons I hear that same hum coming from the brushless models. I don't think the hum is a result of brushes


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My brushless model is practically dead silent. The MP10 dry sides are louder.

A lot of the noise is also dependent on rpms. I'm running at the lowest speed. If I prime it at the fastest then yes, there is noise.

But that is why the recommendation is for the 600rpm model instead of the 100rpm.

At 10rpm, I'm using 1/60th of the speed vs 1/10.


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[Bpb]

The noise ours makes is the same whether you run at 6 or 600 rpm. Yes at higher rpm it jntroduces more noise, but that electrical him is there regardless once you hit start, and increasing or decreasing the speed doesn't have any effect on it


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[rovster]

Originally Posted by Bpb

The noise ours makes is the same whether you run at 6 or 600 rpm. Yes at higher rpm it jntroduces more noise, but that electrical him is there regardless once you hit start, and increasing or decreasing the speed doesn't have any effect on it


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This is my observation as well. At higher rpm the moving parts make ore noise but the hum is always there. If greasing or replacing brushed stands a good chance on silencing it I'd do that. If this is normal oh well, should have gone brushless lol

[slief]

Originally Posted by rovster

This is my observation as well. At higher rpm the moving parts make ore noise but the hum is always there. If greasing or replacing brushed stands a good chance on silencing it I'd do that. If this is normal oh well, should have gone brushless lol

You do not grease the brushes and they do not contribute to the hum. The only noise I have heard as a result of the brushes are the occasional squeak. The hum is 100% normal with the brushed models. If it's really bothersome, take some towels and wrap it around which will mute most of the sound.

[rovster]

Thanks slief at least I feel better now that I don't have a faulty pump!

[souk]

I just received my 77201-60 head but it didn't come with any screws to mount it to the masterflex. I'm pretty sure its been ask already and I haven't seen it yet going page by page. if any body knows the size please help out.

thanks!

[dendrite]

Not sure about sizing, but hope that someone on here has an extra set. Otherwise Cole Palmer will be happy to sell you a set for thirty odd dollars for two

[Bpb]

Has anyone gone about replacing brushes on their unit? I don't think I need to currently, but in the event I do, is it a pretty easy process? As in someone with very little experience in working with electric motors can do without a lot of trouble or special tools?


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[slief]

Originally Posted by Bpb

Has anyone gone about replacing brushes on their unit? I don't think I need to currently, but in the event I do, is it a pretty easy process? As in someone with very little experience in working with electric motors can do without a lot of trouble or special tools?


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Replacing brushes is very easy. Disconnect the power. Remove the cover and on the back half of the pump are two black plastic screw in caps. Remove the caps. The brushes will pop part way out. Pull them out, slide the new ones in. Screw caps back in and put the cover back on.

[Madehtsobi]

i just noticed today on my 7520-50 unit that theres like "zzzzzzzz" sound coming from it...where would i spray some wd-40 or other type of lubricant in it?

[souk]

My unit finally arrived! I can't wait to set it up. Just gotta find some hardware to mount the head. Don't really wanna drop 30 bucks on 2 screws. Hopefully Ace will have something I can use.

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[swk]

I believe any 8/32 threaded rod is what you're looking for.

[souk]

Originally Posted by swk

I believe any 8/32 threaded rod is what you're looking for.

Thank you! From measuring the head to the unit I think it's 3.25" that I need. Off to Ace.

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