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Author Topic: I've never known carbons to do this before!  (Read 6849 times)

Online beko1987

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I've never known carbons to do this before!
« on: January 25, 2014, 11:11:11 PM »


Nice DC04 with a dead motor





This was melted into the motor housing, had to wire wool it clean in the end. It's like it's been shot with some pencils!

Put another motor in, and had a look at the carbons before slinging the motor in the bin





I've never known carbons to explode like that in all the motors I've had experience of!



Just waiting for a new internal hose and post motor filter and she'll be good to go!
Collector and restorer of vintage vacuums, Dyson Appreciator! Come and see my blog, where I am uploading all my mountains of brochures, manuals and other vacuum cleaner paperwork, and also my youtube channel @beko1987!

Online MVacs

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Re: I've never known carbons to do this before!
« Reply #1 on: January 26, 2014, 01:57:46 AM »
Gotta love the DC04.

They are like the Volvo nine series of Dyson.

Online Sleaford White

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Re: I've never known carbons to do this before!
« Reply #2 on: January 26, 2014, 04:27:32 PM »
Can someone give me a step by step guide as to how to replace carbon brushes? I tried it once and couldn't get them out.  :coffee:

Online beko1987

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Re: I've never known carbons to do this before!
« Reply #3 on: January 26, 2014, 04:30:44 PM »
Let me get home and I'll post pictures. You need to be able to solder though
Collector and restorer of vintage vacuums, Dyson Appreciator! Come and see my blog, where I am uploading all my mountains of brochures, manuals and other vacuum cleaner paperwork, and also my youtube channel @beko1987!

Online Sleaford White

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Re: I've never known carbons to do this before!
« Reply #4 on: January 26, 2014, 05:05:37 PM »
Cheers Beko!

Online beko1987

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Re: I've never known carbons to do this before!
« Reply #5 on: January 27, 2014, 12:44:39 AM »
Well, although I've never successfully changed ydk carbons, it looks do-able



Prise those two tabs vertical then the brass square plate should pop off. However, the coil cables will be soldered onto the back of them, and I'm not sure how much room you would have to play with.

I broke the spade terminals hooking up a Turbopower motor recently, and by chopping the coil cables off at the terminal, you can unwind them one turn to give you lots of slack



That's basically how it works on a simpler scale! On this motor the carbon housing is metal and connects inline further down. Principle seems the same though

Anyway, get the coil wire off, then snip the little braided copper wire off that comes out of the carbon. Re-solder the coil wire back onto wherever it goes.

Taking new carbons, which come with the spring too, you'll need to somehow thread the spring onto the string wire, then keeping the wire out a bit put the carbon in the holder, and wrestle the brass plate back on being careful not to pull the coil wire off. Then solder the braided cable to the back of the brass plate (you did keep that poking out didn't you?)

All the above is hypothetical. I nearly changed the carbons on a dc07 motor years ago but then got a good motor off a scrap machine do didn't bother. I might attempt it one day, but I cant solder so I'll need to persuade my stepdad to stand in the garage and soldering about a bit.

Maybe one of the mvacs techs have done it successfully?

However, how would you know that the buggared carbons havent killed the armature? I've seen Hoover motors with chunks taken out due to bad wear. I've heard of a commutar cleaner stick, but you would have to mount the motor, fire her up and push this stick against the armature to clean it up. If you uncover wear then it's game over anyway!



How would you know that that was sound under there?

Long and short of it, it's usually easier to get a scrap machine with a good motor, or a new motor from here, there or anywhere!
Collector and restorer of vintage vacuums, Dyson Appreciator! Come and see my blog, where I am uploading all my mountains of brochures, manuals and other vacuum cleaner paperwork, and also my youtube channel @beko1987!

Online beko1987

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Re: I've never known carbons to do this before!
« Reply #6 on: January 27, 2014, 12:47:02 AM »
Oh, and to answer your original question, I just ripped the brass plates off with some pliers and snipped any cable attaching it off. Then looked at it...

It was long  :dead-dyson: so I wasnt gentle!
Collector and restorer of vintage vacuums, Dyson Appreciator! Come and see my blog, where I am uploading all my mountains of brochures, manuals and other vacuum cleaner paperwork, and also my youtube channel @beko1987!

Online MVacs

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Re: I've never known carbons to do this before!
« Reply #7 on: January 27, 2014, 01:35:10 AM »
Maybe one of the mvacs techs have done it successfully?

We never change carbon brushes any more. They always seem to spark like a firework afterwards and/or have a very short life. The armature is usually shot.

We only sell them because people kept badgering us for them.

Faster and more reliable to change the motor.

Online Sleaford White

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Re: I've never known carbons to do this before!
« Reply #8 on: January 27, 2014, 12:59:56 PM »
Completely agree with MVacs about this!

Online bluebumble485

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Re: I've never known carbons to do this before!
« Reply #9 on: January 27, 2014, 02:09:35 PM »
i agree i tied at the start to save waste of time and money
scrap it wiegh it in best thing

Online Sleaford White

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Re: I've never known carbons to do this before!
« Reply #10 on: January 27, 2014, 02:45:53 PM »
I get 50p per motor for scrap. What do you lads get?

Online __russ__

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Re: I've never known carbons to do this before!
« Reply #11 on: January 27, 2014, 03:10:15 PM »
I get 50p per motor for scrap. What do you lads get?

57p so tiny bit more - funny you should ask as last time I weighed them in, I counted how many motors there were so I could work out how much per one  8)

Online beko1987

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Re: I've never known carbons to do this before!
« Reply #12 on: January 27, 2014, 04:38:10 PM »
Mines sat in the wheely bin. Don't go through enough to bother weighing them in!
Collector and restorer of vintage vacuums, Dyson Appreciator! Come and see my blog, where I am uploading all my mountains of brochures, manuals and other vacuum cleaner paperwork, and also my youtube channel @beko1987!

Online MVacs

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Re: I've never known carbons to do this before!
« Reply #13 on: January 27, 2014, 07:09:32 PM »
I get 50p per motor for scrap. What do you lads get?

I'm pretty sure we get closer to a quid.

Online bluebumble485

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Re: I've never known carbons to do this before!
« Reply #14 on: February 11, 2014, 08:11:02 PM »
wieghed in today about 80p each i leave the rubbers on as well

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