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Author Topic: DC75 ERG replacement brushbar motor  (Read 1356 times)

Offline Woodulike

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DC75 ERG replacement brushbar motor
« on: March 14, 2021, 04:03:29 PM »
Hi, I have a DC75 and the brushbar motor isn't working.  I have about 320VDC at the motor and if I move the motor slightly it spins up, but I the first time I did that with the cover off a small piece of curved metal, looks like brass to me, came flying out.
Anyway, I thought maybe it needed new brushes but with pieces of metal flying out it's probably best to change the motor.

Question is, as the motor listed for the DC75 says non returnable because of misdiagnosis, that the pictures don't look exactly the same as my motor, and plastic at the end where the belt is connected looks different.
Also when I split the plastic housing apart to reveal the belt the dust cover on the side of the bearing was stuck to the plastic housing, like it has got very hot and melted to the plastic.  There was a lot of hair stuck under the brush drive cogs when I removed them!

The other thing is the 'Big Ball' gets quite hot.  I assume this is where the main motor is?  I have changed the filters in there but it didn't seem to make much difference to the increased temperature, but did improve the suction.  It may be that that is normal, but having had the dyson for many years I have no idea what it was like when it was new.  Basically I can't see the point of fixing one thing now and ending up replacing half the machine over the next 5 years and wondering if that is the route I am headed down at the moment.  Seems from reading this forum that some machines are much more reliable than others, and I don't have a great one!

Any thoughts and advice appreciated, thanks.

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Re: DC75 ERP replacement brushbar motor
« Reply #1 on: March 14, 2021, 04:13:02 PM »
the pictures don't look exactly the same as my motor, and plastic at the end where the belt is connected looks different.

The motor fitted to DC75 ERP heads is >this one<. That has the plastic end housing for a DC25 on, so you simply swap your housing over. It's the same motor with the same cog otherwise.

However, from what you have said, I'd be inclined to change the full head

On the motor getting hot, that's subjective I suppose. But they can run a little hot generally. But being too hot might signify the end is near for the motor. Especially if it wheezes when powering down.

Offline Woodulike

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Re: DC75 ERG replacement brushbar motor
« Reply #2 on: March 14, 2021, 09:16:55 PM »
Thanks, for the fast response.
One of the bearings does feel a bit rough, I think that needs changing. Not sure how easy it is to get the bearing off the plastic housing though. Other than than the head seems OK.
On the motor getting hot, that's subjective I suppose. But they can run a little hot generally. But being too hot might signify the end is near for the motor. Especially if it wheezes when powering down.
When I turned it on to see if the motor was wheezing it ran for a few seconds and then stopped. I had to unplug it and leave it for quite a while before it ran again.  It does seems to be running OK now and doesn't wheeze, but not sure it's running as it should.  It sucks well with the hose but the floor head doesn't seem to have much suction, as if spreading the suction over a larger area makes it nearly usless. Without the brush spinning ot hardly picks up anything.
I'm wondering if a refurbished machine would be a better buy, and cheaper.  How big is the dust collector on the DC14?

Offline dannysdysons123

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Re: DC75 ERG replacement brushbar motor
« Reply #3 on: March 17, 2021, 10:35:42 AM »
Thanks, for the fast response.
One of the bearings does feel a bit rough, I think that needs changing. Not sure how easy it is to get the bearing off the plastic housing though. Other than than the head seems OK.
On the motor getting hot, that's subjective I suppose. But they can run a little hot generally. But being too hot might signify the end is near for the motor. Especially if it wheezes when powering down.
When I turned it on to see if the motor was wheezing it ran for a few seconds and then stopped. I had to unplug it and leave it for quite a while before it ran again.  It does seems to be running OK now and doesn't wheeze, but not sure it's running as it should.  It sucks well with the hose but the floor head doesn't seem to have much suction, as if spreading the suction over a larger area makes it nearly usless. Without the brush spinning ot hardly picks up anything.
I'm wondering if a refurbished machine would be a better buy, and cheaper.  How big is the dust collector on the DC14?


I believe that the dc14 has a 2.7 litre bin. If you are thinking about buying one, get one that has darker grey plastic as they are better than the lighter grey ones, if you are buying refurbished then buy one that has been refurbished correctly, not just been wiped down, and if you have a mix of carpet and hard floor then buy a clutched machine

Offline Parwaz7862

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Re: DC75 ERG replacement brushbar motor
« Reply #4 on: March 21, 2021, 06:14:50 AM »
Thanks, for the fast response.
One of the bearings does feel a bit rough, I think that needs changing. Not sure how easy it is to get the bearing off the plastic housing though. Other than than the head seems OK.
On the motor getting hot, that's subjective I suppose. But they can run a little hot generally. But being too hot might signify the end is near for the motor. Especially if it wheezes when powering down.
When I turned it on to see if the motor was wheezing it ran for a few seconds and then stopped. I had to unplug it and leave it for quite a while before it ran again.  It does seems to be running OK now and doesn't wheeze, but not sure it's running as it should.  It sucks well with the hose but the floor head doesn't seem to have much suction, as if spreading the suction over a larger area makes it nearly usless. Without the brush spinning ot hardly picks up anything.
I'm wondering if a refurbished machine would be a better buy, and cheaper.  How big is the dust collector on the DC14?


I believe that the dc14 has a 2.7 litre bin. If you are thinking about buying one, get one that has darker grey plastic as they are better than the lighter grey ones, if you are buying refurbished then buy one that has been refurbished correctly, not just been wiped down, and if you have a mix of carpet and hard floor then buy a clutched machine


Darker grey DC14s are better simply because of the plastic being more robust than the older light grey coloured Dysons  :thumbsup: :icon_nod:
DC14s are tanks, just need a slightly longer motor life. Do plastic parts often break on DC14s? Nope. DC41- Sexy looking futuristic and powerful machine. Just needs a better designed cleaner head wheel and cyclone clip along with a dense metal rod in the chassis.

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Re: DC75 ERG replacement brushbar motor
« Reply #5 on: April 03, 2021, 03:53:14 PM »
When I turned it on to see if the motor was wheezing it ran for a few seconds and then stopped. I had to unplug it and leave it for quite a while before it ran again.

That's overheating. Coupled with a faulty head, I'd be inclined to replace the machine.

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