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Started making a loud humming sound for about the last month. checked to see if anything was around the food

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  #1 (permalink)  
Old 12-17-2007, 08:31 AM
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Default noise from motor or pump?
Model Number: dul300xtlt3   Brand: Whirlpool   Age: 1 - 5 years   

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Started making a loud humming sound for about the last month. checked to see if anything was around the food chopper and it was clear. Just wondering if it may be the motor or pump. It gets run about once a day and has continued to work for at least a month , just loud humming noise when running


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  #2 (permalink)  
Old 12-17-2007, 09:00 AM
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If you hear the noise during the wash cycle, you will need to replace the pump assembly. The whole unit gets changed together and can be done without removing the DW from the cabinet.

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Old 12-17-2007, 11:24 AM
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Smile install

I'll go ahead and buy the assembly, do you have a link to some install directions? thanks
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Old 12-17-2007, 07:16 PM
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It isn't a real hard fix, but can be tricky if you haven't done them before. Get back to me when you get the pump assembly and I will see what I can find for you.

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Old 12-19-2007, 02:01 PM
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Question install

I have the pump assembly and was wondering if its easier to pull the unit out of the cabinet. I don"t see any way to remove it without moving out. Thanks
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Old 12-19-2007, 05:59 PM
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I find it easier for me if I leave it in place, but I have done a ton of these. The sump assembly will be removed from the inside of the tub, so you need to remove the racks, take off the wash arm, and remove the two screws holding the delivery tube to the rear of the tub. The tube can be split in two and separated from the lower part connected to the top of the assembly. The lower part will slide to the right and unlock from the top of the assembly. The wash arm connector will have a clear Mylar ring around it so don't lose it. From under the tub, remove the drain hose and the drain pump. The pump has a keeper in the upper left corner when you look at it. Press it with your thumb and rotate the pump toward you. It will separate from the sump assembly. Now the assembly is held in place with three white tabs, one directly above the drain hose connection, one 90 degrees to the left, and one 180 degrees in the rear. Just pull them out. Next place your hand under the assembly and push up until it pops out of the tub. The thermister and motor wire harness will still be attached. Remove the motor harness and rotate the thermister counterclockwise to release it from the sump. You should be able to remove the whole thing. Put the new on back in opposite of the way the original came out. Be careful of the while cover over the motor. It must go under the tub and not be pinched in between the sump and the tub. You may need to put some pressure on it to make it seat well since it is new. Connect the motor harness and install the thermister before pressing the pump in place. Put everything back together and that should do it. I had some students do this in class today and took some pictures. Hope they help.
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Last edited by TechnicianBrian : 12-19-2007 at 06:02 PM.
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Old 12-20-2007, 03:36 PM
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I went ahead and pulled the unit out. If I had done this two or three times I may attempt it under the cabinet and the worst part was getting it out and putting it back under. Thanks for the photos and your help. The washer is much quieter now, the arms my not be as smooth as when new, but at least its not like a plane getting ready for takeoff out of the kitchen.
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Old 12-30-2007, 03:23 PM
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Thumbs up Thanks!

Hey i want to thank both of you for your discussion on this topic and brian for the pics... I had the same problem, i laughed when i read sleach's description of the noise b/c i told my wife last week it sounded like a 747 engine in the kitchen before reading this post. The biggest issue i had with this install was ensuring that the assy was seated properly...i had to have my wife push down from the top while i re-installed the clips, also, be careful about that little plastic washer under the wash arm, it might come flying out when you move the wash tube to the side. Thanks Again, ZIP.

Last edited by jszczypien : 12-30-2007 at 07:30 PM.
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Old 12-30-2007, 07:31 PM
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I've got a quick question in reference to your #3 pic. When i pulled my drain pump to swap it over to the new sump assy, i noticed that it was seperatated under the o-ring. Is that normal or should it just be one piece with the o-ring? It has not leaked yet.
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Old 12-31-2007, 08:06 AM
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There are two kinds of drain pumps, one with a fixed o-ring and one with a floating o-ring and they work the same, but one is easier to install than the other. If yours hasn't leaked, you did good when you replaced it and it should be fine
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