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B&G 100 Pump chatter noise

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JohnK
JohnK Member Posts: 7
edited January 2020 in THE MAIN WALL
I’m hearing a chattering noise at startup which eventually goes away after a few seconds.

First I oiled it to see if it helped (added too much as it leaked)

I replaced the coupler and motor mounts but still hear the same noise. The old motor mounts didn’t appear to be sagging at all.

Please watch this video to hear the noise!

https://youtu.be/g0sYaEviqAU

Comments

  • STEVEusaPA
    STEVEusaPA Member Posts: 6,505
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    Are you sure the coupling was installed correctly? Which one did you use? Sounds like the one that makes an 'X' instead of the one that looks like 2 wheels.

    There was an error rendering this rich post.

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,614
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    Take the motor off and run it by itself see what that sounds like.

    The coupling has to pull the springs, not push them there are a couple of different couplings.......make sure you have the right one. Turn the bearing assembly and see what that feels like. Make sure the coupling set screw in in the recess in the shaft
    Intplm.
  • JohnK
    JohnK Member Posts: 7
    edited January 2020
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    The new coupler looks like the old one. Both the new and old were making the same chattering noise...well, the old one only recently started making noise. It was the original coupler because it had red spray paint..

    I will try running it with the coupler and motor taken off..
  • Gordy
    Gordy Member Posts: 9,546
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    Were the motor mounts replaced? Usually worn mounts create a misalignment of the shaft to the coupler causing it to fail.
  • STEVEusaPA
    STEVEusaPA Member Posts: 6,505
    edited January 2020
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    I usually use one that looks something like this:

    There was an error rendering this rich post.

    B_Sloane
  • JohnK
    JohnK Member Posts: 7
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    @EBEBRATT-Ed

    When I turn the motor shaft with my hand, I do seem to hear one click per turn.

    I haven’t tried turning the bearing assembly shaft...

    @Gordy yes I replaced the motor mounts (but the old ones seemed pretty good shape)
  • retiredguy
    retiredguy Member Posts: 914
    edited January 2020
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    Sounds like a problem with the spring coupler or a loose or bad impeller, or watch the coupler closely when the motor starts up. , Does the coupler turn smoothly or does it jerk slightly or shake when making that noise. The problem could be a bad or worn start switch in the motor or that the motor needs replaced.
    JohnK
  • B_Sloane
    B_Sloane Member Posts: 56
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    Starting Switch
    JohnK
  • JohnK
    JohnK Member Posts: 7
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    i switched from a 100 to a nrf-33. Quiet
  • HVACNUT
    HVACNUT Member Posts: 5,861
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    Smart move switching to a wet rotor pump.
    JohnK