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My Maytag MDBH965AWW Legacy Series 300 is making a loud grinding noise. I took off the lower spray arm and other parts below it to see if something was lodged near the chopper blade. What I found was broken plastic pieces from the bottom of the filter/flowplate assembly. It appears that the chopper blade is coming in contact with the filter/flowplate assembly and therefore the chopper blade is chopping away at the bottom of the filter/flowplate assembly. What do you think the problem is? How can I fix this? Somehow the chopper blade is coming in contact with filter/flowpalate assembly. Please help. Thank you.

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  • cargento1 Sep 07, 2009

    Chopper has Become UNSEATED By Way of FASTENER or BEARINGS

    The dishwasher is only three years old with extremely light use (twice per month) in a secondary kitchen. I actually recently removed the dishwasher from the kitchen as I had new counter tops installed. When I reinstalled it the grinding problem began. I never had this problem before. Could it have been caused by the removal/reinstallation? I am running the dishwasher right now as we speak and there is no more grinding noise. Please let me know how I can fix this problem. Where is the fastener located (inside or bottom of dishwasher)? Thanks.


  • cargento1 Sep 07, 2009

    My Maytag MDBH965AWW Legacy Series 300 Dishwasher is making a loud grinding noise. I took off the lower spray arm and other parts below it to see if there was something lodged near the chopper blade. What I found was broken plastic pieces from the bottom of the filter/flowplate assembly. It appears that the chopper blade was coming in contact with the filter/flowplate assembly and therefore the chopper blade was chopping away at the bottom of the filter/flowplate assembly. The dishwasher is only three years old with extremely light use (twice per month) in a secondary kitchen. I actually recently removed the dishwasher from the kitchen as I had new counter tops installed. When I reinstalled the dishwasher the grinding problem began. I never had this problem before. Could it have been caused by the removal/reinstallation? What do you think the problem is? How can I fix this?
    I just reassembled the dishwasher and I am running it right now as we speak and there is no more grinding noise but I would like to know what I can do to stop this problem from occurring in the future. Another expert thought the chopper blade became unfastened or had bad bearings but it appeared to be screwed on tightly and did not move when I pulled on it. Please let me know what you think caused this problem and how I can permanently fix the problem? Thanks.

  • cargento1 Sep 07, 2009

    Thank you. I will consider your solution if needed in the future. After I cleaned out the broken plastic pieces from the bottom of the filter/flowplate assembly and reassembled the dishwasher I ran it through a few cycles and no more grinding noise. Perhaps there was something lodged near the chopper blade at some point which caused the chopper blade to hit the object and cause the filter/flowplate assembly to become chopped up. I am keeping my fingers crossed right now and hoping the problem will not return. We shall see. Thanks again.

  • cargento1 Sep 07, 2009

    Thank you for all of your assistance.

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Here is the break down view of what you have. The only way to fix this is to get to the chopper and tighten things up. Look at the photos and you can see the chopper and how to do it, it's a bit of a job...

Remove Chopper Sleeve by using Impeller as a
wrench. Lock motor rotation using the access hole
provided in back of motor.

Here are some illustrations.....

My Maytag MDBH965AWW Legacy Series - 762d57c.jpg



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My Maytag MDBH965AWW Legacy Series - a218c1c.jpg>a218c1c.jpg

Posted on Sep 07, 2009

  • Craig Butler
    Craig Butler Sep 07, 2009

    Yes, very possible, I have the service manual. Let me know if I can help you. Thanks!

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Chopper has Become UNSEATED By Way of FASTENER or BEARINGS

Posted on Sep 07, 2009

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6ya6ya
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