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Author Topic: DC 40 Brush bar stops as the handle tilts backwards  (Read 1820 times)

Offline Ray1000

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DC 40 Brush bar stops as the handle tilts backwards
« on: April 15, 2018, 12:02:52 AM »
This is my first post ... I imagine the answer is already on the forum but I haven't yet found it.
The brush bar starts spinning as it should, and stops as the handle is tilted back to about the 2 o'clock position. It remains stood for the rest of its travel.
It restarts as the handle is lifted back to that precise point ... it will do this as regular as clockwork, it never varies.
Any help would be much appreciated. You won't be able to over explain it as I'm not familiar with the names of the individual components.
Thank you very much
Ray

Online ryevac

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Re: DC 40 Brush bar stops as the handle tilts backwards
« Reply #1 on: April 15, 2018, 02:08:17 AM »
I could be yolk loom break, or brush switch.
Micro switch could have a blind spot on its internal contact, the cam could have a problem re it's spring but i would say yolk loom even though you say it's always in a certain position.
I personally never had a switch fail on this model, in fact i never had a switch fail on the 24,25,40 or 41
Have a good read of Beko's post.
https://manchestervacs.co.uk/DysonForum/index.php/topic,3166.0.html
If it was assembled it can be disassembled - if we can't repair it then it probably isn't worth repairing !

Offline Ray1000

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Re: DC 40 Brush bar stops as the handle tilts backwards
« Reply #2 on: April 15, 2018, 01:45:51 PM »
Thank you, if being in the same position when it stops is significant when it comes to it being a broken wire in the loom ... it stops and starts in the same position even when the machine is on it's side ... either side.
Ŕay

Online MVacs

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Re: DC 40 Brush bar stops as the handle tilts backwards
« Reply #3 on: April 15, 2018, 04:32:04 PM »
It's the yoke loom - a common design fault. There is a topic in the stickies here: Dyson DC40 Brushbar Not Turning.

Online ryevac

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Re: DC 40 Brush bar stops as the handle tilts backwards
« Reply #4 on: April 15, 2018, 05:11:13 PM »
Yes i would say the cable has snapped but part of the insulation is still joined, and acting as a hinge for the break in the cable.
If it was assembled it can be disassembled - if we can't repair it then it probably isn't worth repairing !

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Re: DC 40 Brush bar stops as the handle tilts backwards
« Reply #5 on: April 15, 2018, 05:20:59 PM »
Yes i would say the cable has snapped but part of the insulation is still joined, and acting as a hinge for the break in the cable.

Aye, they do that.  :icon_nod:

Offline Ray1000

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Re: DC 40 Brush bar stops as the handle tilts backwards
« Reply #6 on: April 16, 2018, 11:42:38 PM »
Thank you very much, I shall have a read and no doubt be back with a question or two

Ray

Offline Ray1000

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Re: DC 40 Brush bar stops as the handle tilts backwards
« Reply #7 on: April 17, 2018, 10:22:29 PM »
Thank you for your help so far ... I still haven't explored where the suspected broken wire might be, the close up pictures in the other threads don't give any indication to someone who has never seen the inside of one. To all you experts I can understand how it might all sound straightforward.
What I could do with is someone explaining where the wire is located ... what needs removing before you can see it ... and what needs removing to change or repair the wire.

Ray

Offline Ray1000

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Re: DC 40 Brush bar stops as the handle tilts backwards
« Reply #8 on: April 26, 2018, 02:10:36 AM »
It's the yoke loom - a common design fault. There is a topic in the stickies here: Dyson DC40 Brushbar Not Turning.


Thank you for that ... I have read the topic you suggest but would still benefit from knowing where on the machine the broken wire is.
Thank you
Ray

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Re: DC 40 Brush bar stops as the handle tilts backwards
« Reply #9 on: April 26, 2018, 04:58:46 PM »
Look at the black and white wire in the third picture down >>here<<.

That's it. 

Offline Ray1000

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Re: DC 40 Brush bar stops as the handle tilts backwards
« Reply #10 on: May 29, 2018, 12:07:56 AM »
Ryevac and MVacs ... you were exactly right ... we continued using the vacuum cleaner in the until the brush stopped and wouldn't start ... the white wire was broke in two.

During the repair I inadvertently removed the screw from the clear cog and have lost the position.

Could you explain how to re-position it. The fact it moves with the tilt of the machine I need two reference points to position it properly.

Thank you
Ray

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Re: DC 40 Brush bar stops as the handle tilts backwards
« Reply #11 on: May 29, 2018, 11:45:13 PM »
I can't remember off top of my head, however i have a dc41 to go out to tomorrow with same suspect fault so will refresh then.
If it was assembled it can be disassembled - if we can't repair it then it probably isn't worth repairing !

Offline Ray1000

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Re: DC 40 Brush bar stops as the handle tilts backwards
« Reply #12 on: May 31, 2018, 12:06:50 AM »
Thank you
Trev

Ray

Online ryevac

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Re: DC 40 Brush bar stops as the handle tilts backwards
« Reply #13 on: May 31, 2018, 02:06:58 AM »
I think the dc40 is a little different to the 41 but will photograph it before and after

I didn't do mine on site as i had another job to go to and didnt want to put myself under pressure, will be doing it tomorrow am i think.

Should really photograph them beforehand if in doubt, i do as my memory is fading with age....
If it was assembled it can be disassembled - if we can't repair it then it probably isn't worth repairing !

Online ryevac

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Re: DC 40 Brush bar stops as the handle tilts backwards
« Reply #14 on: May 31, 2018, 06:08:30 PM »
bugger, been a while since i did a 40 / 41 ray.
My 41 today revealed head motor fault so didnt strip main ball assembly apart from sides removal, and its different anyway.
Not able to help in this case, if you have a look on previous posts i think beko covered it on a strip / rebuild ?
If it was assembled it can be disassembled - if we can't repair it then it probably isn't worth repairing !

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