Washing machine motor - Carbon Brush & Screw Bit?

manisinghb · 15 Sep 2021 at 21:27

Hi all. I've got a Hoover DXP410AIB3 washing machine for about 4 years now. It stopped working about a week ago...drum doesn't spin. The drive belt is fine. Contacted Hoover customer services and some Internet research..everything points toward the carbon brushes which are supposed to be located in the motor. I've taken the motor out but for the love of God cannot see where they are. They must be inside the housing of the motor but there are these 4 screw/type things the closest word I can use to describe is they look like rivets.

Anyway I've posted a picture would really appreciate if anyone knows what type of screws(?) These are and what type of bit I will need? Many thanks in advance.

free pic host

bremen1874 · 15 Sep 2021 at 21:36

They appear to be rivets. Not designed to come out.

If there are changeable brushes they'll probably be under the black cover on the back end.

Actually, probably not under that cover, but certainly at the back end.

manisinghb · 15 Sep 2021 at 21:44

bremen1874 said:
They appear to be rivets. Not designed to come out.

If there are changeable brushes they'll probably be under the black cover on the back end.

Actually, probably not under that cover, but certainly at the back end.

Thanks for response bremen1874. I should've mentioned that I opened that black cover and there's nothing under there. It appears to just cover the other end of the rotary mechanism?

bremen1874 · 15 Sep 2021 at 21:48

You need to follow the wires.

You've only pictured the front end. What's going on around back?

bremen1874 · 15 Sep 2021 at 21:53

A quick Google suggests that it may be brushless.

manisinghb · 15 Sep 2021 at 22:06

bremen1874 said:
You need to follow the wires.

You've only pictured the front end. What's going on around back?

Uploaded a few more pics below. The wires go in the housing. I'm convinced the brushes must be in the housing but why would they fix with immovable 'rivets'?!

manisinghb · 15 Sep 2021 at 22:08

bremen1874 said:
A quick Google suggests that it may be brushless.

That's interesting. Wondering how the motor moves without contact from the brushes? Any links please?

andy_mk3 · 15 Sep 2021 at 22:09

Cheaper and easier to manufacture sadly that's the only reason why.

bremen1874 · 15 Sep 2021 at 22:11

Some info about 3-phase induction motors here.

https://www.nxp.com/docs/en/application-note/AN3234.pdf

If you Google the motor's part number that's what it's described as.

There are a lot of brushless motors about now, my battery drill has one for a start.

manisinghb · 15 Sep 2021 at 22:19

Ah yes ok I've seen in drills before too. I suppose helps make the machines more silent and economical? Nevertheless, seems like a whole motor replacement then(!)

Thank you so much for your responses. Was a basic solution but didn't come across any of this stuff so thank you. :rolleyes:

bremen1874 · 15 Sep 2021 at 22:31

manisinghb said:
seems like a whole motor replacement then

You can hope that it's that simple.

Mr.Cookie · 15 Sep 2021 at 23:30

With our stuff it's more likely the motor control board, motors generally give very little agro.

Good luck either way

darael · 15 Sep 2021 at 23:48

manisinghb said:
Ah yes ok I've seen in drills before too. I suppose helps make the machines more silent and economical? Nevertheless, seems like a whole motor replacement then(!)

Thank you so much for your responses. Was a basic solution but didn't come across any of this stuff so thank you.

It's more likely to be the motor controller that has gone, not the motor.

Edit:
@Mr.Cookie
Sorry, completely missed your post in a rush to make my own post.

jpaul · 16 Sep 2021 at 11:51

... have you traced back to the circuit board - to see if anything obvious like capacitors are looking stressed.

manisinghb · 16 Sep 2021 at 22:00

Mr.Cookie said:
With our stuff it's more likely the motor control board, motors generally give very little agro.

Good luck either way

Thank you

my knowledge stops at the basic hardware when it comes to kitchen appliances I'm afraid but any input on motor control boards is welcome.

manisinghb · 16 Sep 2021 at 22:00

jpaul said:
... have you traced back to the circuit board - to see if anything obvious like capacitors are looking stressed.

I haven't. Can try this. Any pointers for me to focus on are welcome?

jpaul · 17 Sep 2021 at 12:04

manisinghb said:
I haven't. Can try this.

like for brushed motors, seems there should be a start capacitor - I'd aim to identify and check that

how to test a RUN or START CAPACITOR the CORRECT way
and https://youtu.be/GFUa7bjNsZk

manisinghb · 19 Sep 2021 at 10:06

jpaul said:
like for brushed motors, seems there should be a start capacitor - I'd aim to identify and check that

how to test a RUN or START CAPACITOR the CORRECT way
and https://youtu.be/GFUa7bjNsZk

Thank you will try this next week.

darael · 19 Sep 2021 at 10:26

@manisinghb
Being a brushless motor, there likely won't be a start capacitor. Your investigations should really begin at the motor controller PCB, but they are complicated. Washing machines aren't quite as easy to repair at home as they used to be, sadly.

If you want an idea of what parts are in your machine, look here: https://www.hooverspares.co.uk/washing/washing-machine/dxp-410aib31-80-31006520/catalogue.pl?path=1056567,1056552&model_ref=11872838

@Mr.Cookie
https://www.hooverspares.co.uk/wash...86150&path=1056567,1056552&model_ref=11872838
Am I right in thinking that this is the motor controller PCB?

Mr.Cookie · 19 Sep 2021 at 13:41

@darael I'm electrolux group so not sure on hoover, one thing I would suggest is to do an insulation test on whole appliance just to rule out nothing upsetting electronics.