Numatic help

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rutger

Well-known member
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May 19, 2012
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141
Location
England
Hello
Can anyone offer any help?
I have a Numatic vacuum with the wide stability base that lives in my garage- we call him Colin if that helps :-) He dates I think from around 2002 & has the vertical red press down type switch. I bought him second hand a couple of years ago & he's worked ok (bit noisy at times) since.
Today I switched him on for the first time in months & he made a fluttering/ droning noise & a slightly burnt metallic odour. He still worked but obviously wasn't right so I switched him off. I took his top apart & his brushes appeared very worn, there was no sign of any burnt wiring etc. I stuck him back together & checked but he still made the noise. So he's now sulking in the garage.
Is this likely to be the brushes? Can anyone offer any suggestions?
I (& Colin) would appreciate your help.
Cheers
Dave
 
I would deffinately change the brushes if they are quite low

The are quite easy to fit on a henry. you eather have the HVR200 which is single speed and single stage motor from about 2002 -2003 or you might have the HVR200-22 with push button and rocker high/low switch from 2004-2006, that is a two stage and two speed motor, the carbon brushes should be available on a website such as espares but I would deffinately replace them if they are quite low.

Hope this helps.
 
It could indicate a short in the armature windings, which will cause excessive arcing round the commutator and the symptoms described. New brushes will not solve the problem if it is this.
If the brushes are worn down to the springs, or very near, then it may be that the springs are weak and new brushes may well be all that is needed.

The motor could have got damp inside, which may cause the problem too.
Many Dyson motors die with shorted armatures which make a terrible burning smell and sparking commutators.

If its an old cleaner, then it may be cheaper to replace it as Numatics are not that expensive to buy new.
 
I don't think it would be a short in the armature windings, as that's rare to happen to Numatic motors. But if the brushes are running down to the springs, like you said, it could just be a simple fix. They only cost about £10, so it's not a big loss if you change them and it doesn't solve the problem, as they would need replacing soon anyway. Luckily Numatic's are really easy to work on, with lot's of parts available cheaply.

Good luck on getting it sorted!

- Joe
 
That's superb thanks for the info' all. I've noted the motor type etc & have priced up some brushes so will be getting some & attempting to fit them. I've never worked on a vacuum before so wish me luck !
Many thanks- Dave
 
I am not sure if it is just the new switch bank HVR200-22

But the Henry HVR200-22 with new switch bank have carbon brushes that you can buy as a whole piece in a little cartridge type thing so you just unscrew the holding screw and through the hole cartidge with old carbon brushes away and then you just slot in the new ones and screw them back in.

Beko1987 - I hear you, the carbon brush doors are terrible for snapping off on a Turbopower 1 I hate bending those doors back as they usually always snap off, so I don't do it :P If I want to disasemble the motor I normally carefully pull the armature straight out and when it comes time to put the armature back in I put the carbon brushes in their slots and hold them back in their slots simultaneously with tiny flat head screw drivers and push the armature back in place then release the srew drivers so the brushes are back on the comutator, it is not the easiest way but it is the safest way on those little doors, when a new carbon brush holder is £8.79 (each) I don't want to risk snapping them :P
 
Hello
I haven't done the job yet but the brushes have arrived. It's the single speed Panasonic motor, so the brushes are just carbon type things on the end of springs with a metal bit on the end. I presume I have to get the old spring/brush out & re-use the holder.
It looks like i'll have fun !
Cheers
Dave
 
The actual holder for the carbon brush should stay in place, if it is a carbon brush and a little spring on the end of it. I think on those type motors you have to bend back a tab that is holding them in place or it may be a piece of metal that screws down onto it but anyways you either unscrew or bend back the little tab and then it will just shoot out of there (as the actress said to the bishop) you just pull out the old brush (what is left of it) and spring, chook it out, push the new brushes into the carbon brush holders and bend back the tab (carefully) or screw down the piece of metal which ever it is, you will see when you get yours open but I am willing to bet 90% it will be a tab you have to bend.
By the way, you have the 2003 push button, single speed, single stage motor which is 1100 watts.
 
Excellent, thanks for the tip Alexhoovers94, it'll come in very handy. The info' about the machine itself is great too, as I find that sort of stuff fascinating.
Many thanks - Dave
 
Hello all.

I put the new brushes into my Numatic (Colin) - thanks to all who gave tips on how to do it, that helped me greatly. Unfortunately though he is still making the same noise & smell as before.

If anyone has any other suggestions as to what I might do to fix him, they'd be gratefully received.
Many thanks
Dave
 
Hi Dave,

I'm sorry to hear that changing the brushes hasn't fixed him.
Have you had a good look inside? does anything look cracked/burnt up?
also, is there anything on the commutator?
If all else fails you may have to get a repair man in.

I hope it get's sorted soon.

- Joe
 
Hello
Nothing looks cracked or broken. There was when I initially opened him up a fair bit of muck in there but I got most of that out. Could it possibly be the switch or something like that? As I heard the vertical switch types used on this model aren't that good.
Many thanks - Dave
 
Hello,

It could well be the switch, as it could be making an electrical popping, as the wires connected to the switch could be loose. Yes, as you say, these switches aren't the best, as Numatic soon found out, and stopped making them.

Hope this helps,

- Joe
 
Hello

I might give the switch a try & see how it goes.

If anyone has any other thoughts on what I might try too, please give me a shout.

Many thanks Dave :-)
 
Hello

I think I might opt for a new motor for the little chap,

Is this a straightforward DIY job that I could look at doing myself or more specialist? As if I have to pay someone the cost might be prohibitive.

Any tips/ advice would be great.

Many thanks
Dave
 

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