Author Topic: pump noise  (Read 1745 times)

Offline tschmidlin

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pump noise
« on: January 31, 2013, 03:57:38 PM »
I've got a pump running glycol from the chiller and it makes a weird buzzing noise.  One pump does it and one doesn't, so clearly something is wrong.  I thought that there might be some air in the head, so I loosened the nut to vent it and the pump quieted right down - success!  Unfortunately when I tightened the nut again the noise picked right back up.

Can anyone tell me what is going on and how to fix it?

Here is a pic of the head zoomed in for part numbers, the nut is on the left.

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Re: pump noise
« Reply #1 on: January 31, 2013, 04:10:00 PM »
Totally uninformed and without specific knowledge but if bleeding air from the head made the noise stop but then it started again could there be a pin whole somewhere in the lines from the glycol storage unit that is adding air on that one pump?

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Offline tschmidlin

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Re: pump noise
« Reply #2 on: January 31, 2013, 04:43:31 PM »
I forgot to mention - when I loosened the nut and it was quiet, I could see a lot of air bubbles in the stream that was being returned to glycol reservoir.  When I tightened the nut and the noise started, the air bubbles in the stream disappeared.  :-\
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Re: pump noise
« Reply #3 on: January 31, 2013, 08:01:04 PM »
Obviously the answer is to leave the nut loose.  ;)
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Re: pump noise
« Reply #4 on: January 31, 2013, 08:03:56 PM »
Obviously the answer is to leave the nut loose.  ;)

I know I whine when my nuts are tight.

Sorry.


Offline tschmidlin

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Re: pump noise
« Reply #5 on: January 31, 2013, 09:53:08 PM »
Obviously the answer is to leave the nut loose.  ;)
Obviously :)

But I am worried that if I leave it loose it will vibrate even looser, and that's when the glycol starts shooting out all over the place.  You don't want to have to clean up a large glycol spill, it is a PITA and that stuff is expensive!
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Re: pump noise
« Reply #6 on: February 01, 2013, 06:51:01 AM »
Obviously the answer is to leave the nut loose.  ;)
Obviously :)

But I am worried that if I leave it loose it will vibrate even looser, and that's when the glycol starts shooting out all over the place.  You don't want to have to clean up a large glycol spill, it is a PITA and that stuff is expensive!

Duct tape.  ;D
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Offline VinS

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Re: pump noise
« Reply #7 on: February 01, 2013, 07:35:17 AM »
I think you might have a kink or blockage in your system. Because opening vent you relieved pressure making pump turn free. I would move and squeeze the lines and see if you hear a change in the pump.
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Offline dak0415

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Re: pump noise
« Reply #8 on: February 01, 2013, 08:26:16 AM »
Your pump does not look like a March pump, but I have heard that sometimes the thrust washer is left off of the impeller spindle allowing the impeller to rattle around a bit.  Make sure all the pieces/parts are in place inside the pump head.
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Offline hopfenundmalz

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Re: pump noise
« Reply #9 on: February 01, 2013, 09:17:44 AM »
Can you describe the noise? A whine? Or a growl?
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Re: pump noise
« Reply #10 on: February 01, 2013, 09:49:51 AM »
Can you describe the noise? A whine? Or a growl?

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Offline tschmidlin

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Re: pump noise
« Reply #11 on: February 01, 2013, 10:06:19 AM »
Can you describe the noise? A whine? Or a growl?
Buzzing.  Its weird.

I think you might have a kink or blockage in your system. Because opening vent you relieved pressure making pump turn free. I would move and squeeze the lines and see if you hear a change in the pump.
Thanks, I'll give that a try.  It seems to flow pretty well though.
Tom Schmidlin

Offline bluesman

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Re: pump noise
« Reply #12 on: February 01, 2013, 10:46:51 AM »
I suggest ear plugs or a sledge hammer. One or the other would work.  ;)

Sorry Tom...but I just couldn't help myself.

On a serious note...have you tried contacting the manufacturer, this is assuming they are designed in an American speaking business. Noted: assembled in Mexico
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Offline tschmidlin

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Re: pump noise
« Reply #13 on: February 01, 2013, 11:45:40 AM »
Can you describe the noise? A whine? Or a growl?
Buzzing.  Its weird.

I think you might have a kink or blockage in your system. Because opening vent you relieved pressure making pump turn free. I would move and squeeze the lines and see if you hear a change in the pump.
Thanks, I'll give that a try.  It seems to flow pretty well though.
Ehhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

says the pump after I move the hose all around trying to find a kink or blockage.   :'(
Tom Schmidlin

Offline tschmidlin

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Re: pump noise
« Reply #14 on: February 01, 2013, 11:46:29 AM »
I suggest ear plugs or a sledge hammer. One or the other would work.  ;)

Sorry Tom...but I just couldn't help myself.

On a serious note...have you tried contacting the manufacturer, this is assuming they are designed in an American speaking business. Noted: assembled in Mexico
Ear plugs - definitely.  Sledge hammer . . . maybe!
Tom Schmidlin