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Thread: Diagnosing Excessive Pump Noise

  1. #1
    Join Date
    Dec 2012
    Location
    Worcester, MA
    Posts
    12

    Diagnosing Excessive Pump Noise

    I have a CIP pump that I'm having issues with. It's noisy. Hearing protection required noisy. Originally I set it up with a Topline C100 pump head. It was reasonably quiet initially, but got noisier over time. On inspection, I found a light marring of the backplate, figured something had gone out of alignment and took the opportunity to upgrade to a C114 head. With the new head on, the problem persists. The motor is pretty much dead silent without the pump installed, so I don't think that's the issue. Doesn't sound like cavitation and my suction hose is a 5' length of 1-1/2", so I don't imagine that's the issue. Only other thing I can think of is something bent in the pump head, but that doesn't seem likely with a brand new head. Anyone have any ideas?

  2. #2
    Join Date
    May 2012
    Location
    Washington, DC, USA
    Posts
    50
    Maybe try getting a replacement seal kit for the pump. Could be worn out. Have you tried calling the manufacturer?

  3. #3
    Join Date
    Jul 2012
    Location
    Burnaby BC Canada
    Posts
    216
    I might be able to help.
    Can you please post a picture of the installation and a sound clip (or video) so I can hear the noise.
    Your CPE Systems Team!
    CPE Systems Inc.
    800-668-2268
    CPEsystems.com
    Thinkpumps.com
    sales@cpesystems.com

  4. #4
    Join Date
    Dec 2012
    Location
    Worcester, MA
    Posts
    12
    I found my culprit. Last time I pulled the head, the motor was quiet. Just pulled it again to record it and it's clearly the problem.
    Last edited by fluxgame; 03-23-2018 at 01:04 PM.

  5. #5
    Join Date
    Jul 2012
    Location
    Burnaby BC Canada
    Posts
    216
    Quote Originally Posted by fluxgame View Post
    I found my culprit. Last time I pulled the head, the motor was quiet. Just pulled it again to record it and it's clearly the problem.
    I looked at the video you posted. It sounds like a bearing in the motor.
    Your CPE Systems Team!
    CPE Systems Inc.
    800-668-2268
    CPEsystems.com
    Thinkpumps.com
    sales@cpesystems.com

  6. #6
    Join Date
    Dec 2012
    Location
    Worcester, MA
    Posts
    12
    Quote Originally Posted by CPESystems View Post
    I looked at the video you posted. It sounds like a bearing in the motor.
    Thanks. New motor is on order!

  7. #7
    Join Date
    Nov 2009
    Location
    Moab, Utah
    Posts
    615

    Setup

    Quote Originally Posted by fluxgame View Post
    I have a CIP pump that I'm having issues with. It's noisy. Hearing protection required noisy. Originally I set it up with a Topline C100 pump head. It was reasonably quiet initially, but got noisier over time. On inspection, I found a light marring of the backplate, figured something had gone out of alignment and took the opportunity to upgrade to a C114 head. With the new head on, the problem persists. The motor is pretty much dead silent without the pump installed, so I don't think that's the issue. Doesn't sound like cavitation and my suction hose is a 5' length of 1-1/2", so I don't imagine that's the issue. Only other thing I can think of is something bent in the pump head, but that doesn't seem likely with a brand new head. Anyone have any ideas?
    Those pumps appear to be very much like Waukesha in design.
    IN the case of the similar Waukesha model, you are supposed to set the extension shaft so that you have .060 clearance behind the impeller to the backplate with ALL other setup dimensions being correct including the drive collar. Once that parameter is set up correctly, it will not change and there is no reason to take the stub shaft loose for seal reaplcement which I have seen some people attempting to do in videos that are misleading. With the extension shaft loose and seal and back plate correctly in place, slide 2 - .060 feeler gauges behind the impeller and lock the shaft down with the backplate fully against the cage housing.
    Remove the feeler guages and let the backplate spring back forward. If you then force the backplate fully back you will see you have the right clearance for your impeller.

    Star
    Warren Turner
    Industrial Engineering Technician
    HVACR-Electrical Systems Specialist
    Moab Brewery
    " No Cell Phone Zone."

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