Author Topic: LG WM2487HWMA drain pump  (Read 1393 times)

Offline saxetnella

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LG WM2487HWMA drain pump
« on: May 06, 2013, 01:55:32 AM »
I have been searching everywhere for an answer. I have found references to the same problem with similar symptoms, but nobody addresses this one detail...

The drain pump has stopped working. I removed and disassembled the motor. And found that the armature/rotor is inside a 'plastic tube'. And the field/stator fits around the 'plastic tube'. The impeller turned freely, but did make a 'scratchy' noise. Also, a black gritty water came out from behind the impeller from inside the 'plastic tube'.

Please, someone answer this question !!!
Is there supposed to be any water in the 'plastic tube' ??

Is it supposed to be dry in there and this is a 'failsafe' for when the seal goes out so that it doesn't leak ??
My guess is that it is supposed to be dry and the grit is corroded rotor bits...
« Last Edit: May 06, 2013, 02:04:03 AM by saxetnella »

Offline AJ

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Re: LG WM2487HWMA drain pump
« Reply #1 on: May 06, 2013, 05:10:52 AM »
Please, someone answer this question !!!
Is there supposed to be any water in the 'plastic tube' ??

Is it supposed to be dry in there and this is a 'failsafe' for when the seal goes out so that it doesn't leak ??
My guess is that it is supposed to be dry and the grit is corroded rotor bits...

No, there should not be any water in the 'plastic tube' you are talking about.
The rotor needs to stay dry. I would replace the pump.

I guess you could call it a 'failsafe' design that keeps it from leaking all over the place when the seal goes out.
Hope you find our site helpful.

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Re: LG WM2487HWMA drain pump
« Reply #2 on: May 06, 2013, 05:30:19 PM »
Please, someone answer this question !!!
Is there supposed to be any water in the 'plastic tube' ??

Is it supposed to be dry in there and this is a 'failsafe' for when the seal goes out so that it doesn't leak ??
My guess is that it is supposed to be dry and the grit is corroded rotor bits...

No, there should not be any water in the 'plastic tube' you are talking about.
The rotor needs to stay dry. I would replace the pump.

I guess you could call it a 'failsafe' design that keeps it from leaking all over the place when the seal goes out.

Should the water be there? NO thats why they have an o ring between the two pieces... Does EVERY pump I remove have water in there? YES. O0 O0

Offline saxetnella

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Re: LG WM2487HWMA drain pump
« Reply #3 on: May 07, 2013, 12:02:21 PM »
Thanks for the replies.

Interesting motor design though with the structure being plastic that envelopes the rotor and the field coil slides into a slot that surrounds the rotor. 
The only problem with this 'failsafe' design is that you don't know that the rotor seal is going bad until it stops working!!!
But I guess that the trade off is that you don't get water on your floor and possibly cause water damage.

Since I have not seen any kits to replace the seal and/or rotor, is it correct to assume that the only way to repair the pump is to buy a new motor? Is the rotor a serviceable part? Or is it factory sealed?
Just curious; I have  part 4681EA2001T on the way.

Too bad they don't sell parts as I am an old school DIY and rebuild what I can. But these days, that concept is obsolete.
Looks like I will have more motor parts for kids to do experiments!!

So now the next series of questions:
How do I help prevent the new pump's seal from going bad??

This machine is only 4 yrs old.
Is this going to be an event occurring every 4 years?
Is 4yrs to failure...  premature? normal? you're lucky!!?
Is there a way to check if the circulation pump seal is about to go too?

Offline AJ

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Re: LG WM2487HWMA drain pump
« Reply #4 on: May 07, 2013, 08:10:39 PM »
Quote
This machine is only 4 yrs old.
Is this going to be an event occurring every 4 years?

Time will tell, but I don't see any reason to expect the replacement part to last any longer then the original pump.

Quote
Is 4yrs to failure...  premature? normal? you're lucky!!?

About normal...

Hope you find our site helpful.

Offline saxetnella

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Re: LG WM2487HWMA drain pump
« Reply #5 on: May 07, 2013, 11:02:57 PM »
Got the part today. Installed it. Works.   

This is an awesome site!!
My dad would have loved to have this in his day... rather than taking things apart, making several phone calls to various dealers and taking the suspect parts to the shop for pieces or replacement. I learned a lot from him.
But I must say, researching, diagnosing, watching videos of the task and then ordering parts online is so much easier!!!

Thanks again for the replies.   

« Last Edit: May 07, 2013, 11:04:39 PM by saxetnella »

Offline AJ

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Re: LG WM2487HWMA drain pump
« Reply #6 on: May 07, 2013, 11:06:53 PM »
Awesome! Thanks for the update.  O0
Hope you find our site helpful.

 

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