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Author Topic: The rollers on a Dyson DC23 Motorhead spins for a second then stops  (Read 739 times)

Offline fbagnato

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Hello,

I have a Dyson DC22 Vacuum Cleaner (Motorhead variant) which was missing the Motorhead.

I now have a Dyson DC23 Motorhead which I bought with some other Dyson parts.

The connector is the same so I assume I can use the Dyson DC23 Motorhead with the Dyson DC22 Vacuum Cleaner?

However when I press the power button on the Dyson DC22 Vacuum Cleaner with the Motorhead attached the rollers spin at full speed for a couple of seconds then stop spinning.

I tried pressing the red power button on the motorhead but the rollers do not spin.

I have taken the rollers out and there is no hair causing the problem.

Any idea what the problem could be and what I can do to get the motorhead working?

Regards,

fbagnato

Offline rodga

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Re: The rollers on a Dyson DC23 Motorhead spins for a second then stops
« Reply #1 on: October 27, 2021, 09:07:47 AM »
Hi new member here, just came across your post as I cleaned my one this past weekend as it was also not spinning properly.
There is a youtube video showing how to disassemble it to get to the fan blade thing, which may be broken.
Mine was fine and I think getting rid of all the dirt inside seems to have sorted it out.


I used a heat gun to slightly heat up the to hard to remove covers and it worked well.

Offline fbagnato

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Re: The rollers on a Dyson DC23 Motorhead spins for a second then stops
« Reply #2 on: October 28, 2021, 03:54:25 AM »
Hello rodga,

Thanks for your reply and the link to the video.

I am wondering whether as it is a DC23 Motorhead and I am plugging it into a DC22 Motorhead Vacuum whether that is a problem. I have a DC23 Motorhead vacuum that has the power cord cut so I am going to attach a temporary power cord to it and test the Motorhead. If it works then the mismatch is a problem. If it doesn't I will use your video to see if I can get it working.

Thanks again for your reply and I will post any updates in case it helps anyone else.

Regards,

fbagnato

Offline fbagnato

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Re: The rollers on a Dyson DC23 Motorhead spins for a second then stops
« Reply #3 on: December 10, 2021, 06:56:29 AM »
Hello all,

Just an update for anyone else with a similar scenario.

I ended up with a working Dyson DC23 Motorhead vacuum that I could test the suspect Motorhead on and on the working DC23 the Motorhead does not start then stop after a couple of seconds so you CANNOT connect a Dyson DC23 Motorhead on a Dyson DC22 Motorhead vacuum cleaner even though the connection is the same.

After all the suspect Dyson DC23 Motorhead does stall randomly so it is faulty after all.

Took it apart to clean it thoroughly but the problem remains. I'm guessing the only things that it could be could be a faulty microswitch or faulty motor.

Would be interested in other's opinions.

The motorhead is now spotless so a dirty motorhead cannot be the problem.

Regards,

fbagnato

Offline MVacs

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Re: The rollers on a Dyson DC23 Motorhead spins for a second then stops
« Reply #4 on: December 10, 2021, 12:42:07 PM »
I'd suggest the motor might be the usual suspect in that scenario.

For any confused readers, a DC23 with a motorised head is usually an Australian or US machine. UK ones have vacuum-driven heads.

Offline fbagnato

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Re: The rollers on a Dyson DC23 Motorhead spins for a second then stops
« Reply #5 on: December 11, 2021, 04:01:52 AM »
Hello MVacs and thanks for your reply.

So you think it is the motor. Thanks for your valued opinion.

And I can confirm that I am in Australia and this is a motorhead not a vacuum-driven head so sorry for any confusion to any other readers.

Regards,

fbagnato

Offline Craftsman

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Re: The rollers on a Dyson DC23 Motorhead spins for a second then stops
« Reply #6 on: January 17, 2022, 12:19:55 AM »
I've actually worked on two motorheads recently - a my brother's DC21 and an used DC23 which I purchased off of craigslist.  Both units reported the same issue - motorhead would run for a short period of time (way under 5 minutes usually) and the time before it stops running seems to be random.  Both units needed to rest for a while before the motorhead would run again.

My brother's DC21 was completely clean as he maintains his motorhead extremely well.  After reading through many forums and other sources of internet information, there seems to be a consensus that a clean motorhead should not stall and if it does stall no one seems to know what's wrong.

I ran into this video on Youtube which shows the control board as well as maps out the wiring to the motorhead.
The video got me thinking.  The board is located in basically an enclosed space and heat could be a problem as Dyson designed the board with a rather large copper surface in order to deal with the heat off of the FET.  If the area got too warm, the board may have a microcontroller that will shut the entire thing down until the board cools back off hence the cool off time required. 

So, the question is what gets the FET warm?  Probably having to handle more current than normal.  What causes more current to be handled by the FET?  Hmmm....  The motorhead's motor will see current requirements increase as the motor gets closer to stalling with the highest current draw when the motor stalls.  If the brushes are clean, then what could hinder the motor?

If I look at the setup of the brushbar, I saw that the brushbar relied on sleeve bearings in the two endcaps to hold everything up while it's running. If the bearings were dry of lubrication or dirty, the bearings will hinder the smooth operation of the bar. Looking at the movement of the brushbar in the bearing, the movement wasn't smooth as a bearing should be.  So, I cleaned up the brushbar's pin and the sleeve bearing with some alcohol and applied a thin (less than a drop) layer of lubricating oil on each side.  I tested the setup on some deep pile carpet and the motorhead initially stalled for a bit but didn't stop.  I was able to completely vacuum the room with the motorhead without further stalling.  The problem seems to have been solved.

Next, I purchased a DC23 where the previous owner reported that the motorhead was basically useless as it would stall all of the time and sometimes wouldn't even start (basically the same issue reported as my brother's DC21).  Once I got the DC23's motorhead home, I looked at the brushbar and it was full of hair and a metal twist tie.  Was that the problem?  I didn't ask as I also cleaned and lubricated the pins and bearings.  Success!  The motorhead kept running and I vacuumed not only that room with the motorhead but the rest of the house as well and I had no issues.  While I was testing the DC23, I decided to remove its motor and clean it out.  It turns out that someone attempted to fix the motorhead previously as it was missing a few rubber gaskets under the plate.  I removed the motor and lubricated the exposed bearing on the motor as well as dropped a few drops of lubricant in the gear assembly.

It's been a week now since I cleaned up the two motorheads and both are still running fine without any indication of stalling or stopping through thin and thick carpet.

Offline fbagnato

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Re: The rollers on a Dyson DC23 Motorhead spins for a second then stops
« Reply #7 on: January 17, 2022, 02:38:48 AM »
Great post Craftsman!

I ended up selling the faulty Motorhead so I couldn't try your theory myself but this information should be handy to others facing the same problem.

Regards,

fbagnato

Offline MVacs

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Re: The rollers on a Dyson DC23 Motorhead spins for a second then stops
« Reply #8 on: January 18, 2022, 03:46:52 PM »
Great post Craftsman!

Absolutely! Fab and informative post, Craftsman.  :bow:

Offline Craftsman

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Re: The rollers on a Dyson DC23 Motorhead spins for a second then stops
« Reply #9 on: January 18, 2022, 11:18:06 PM »
Great post Craftsman!

Absolutely! Fab and informative post, Craftsman.  :bow:

Thank you!

I'm hoping that others will see this post and not only fix their motorheads but report back that this works!  I've seen a lot of DC21/23/32 locally being sold with just the hard floor tool on a unit that is clearly motorhead capable.  I'm assuming that they brought the unit into someplace that didn't know how to repair it and told them the motorhead was junk.  It's a shame that so many people don't know how to keep these motorheads going.

As an alternative repair for those who can't/won't clean out the bearing and the shaft, one can also just replace the endcaps along with a new brushbar assembly as well which should fix the issue as well.  However, judging by the price of these parts on Amazon, it's easily $75+ that doesn't need to be spent.

One more thing while we are on the subject, I also took apart the hose as I was wondering what's inside that round thing about 3/4 down the hose from the canister.  It turns out that Dyson joins the two parts of the hose together and seals the vacuum with an 'o' ring and has three metal fingers to transfer the power from the canister to the motorhead so there's a potential point of failure there if there is some dust that gums up the works there (ie a bit of water gets in there and rust develops).  The area with the metal fingers isn't sealed as there was some dust in there when I took it apart and lubricated the plastic sliding bits as well as conditioned the rubber 'o' ring.

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