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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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    • CommentAuthorRex
    • CommentTimeOct 29th 2021
    What ho one and all,

    Unfortunately, not a building question but definitely green related.

    I have a Parkside (Lidl) wet/dry vac that had seen many years of excellent service. Yesterday, annoyingly, it gave up the ghost. With two options available, discard or check the problem and perhaps repair, I chose the latter.

    Very simply, it was a burnt ot carbon brush that is theoretically, easy to replace.

    The attached photo is what I took out and I can find many possible matches on the internet (https://www.ebay.co.uk/itm/383709765591?mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5338722076&toolid=10001). But none have measurements.

    I mailed one ebay seller and had the following reply, "Fits for 30/60/70/80/90L Industrial Vacuum Cleaners." Which is not exactly an answer to my question.

    My vac is a Parkside 30/7E but given its age, I cannot find any parts related reference.

    Am I correct in assuming that all this 'type' for 30/60/70L vacs are a universal fit?

    Thanks and toodle pip.
      20211028_161959 (Small).jpg
    • CommentTimeOct 29th 2021
    Posted By: RexAm I correct in assuming that all this 'type' for 30/60/70L vacs are a universal fit?

    I don't know but maybe its worth buying one or two to try them for fit? It should also be fairly easy to sand a brush down in size a bit if necessary.

    Also, have you called the Parkside support number? In my experience they've been very helpful and managed to sort problems I had. They may be able to supply the spares or tell you where to get them.
    • CommentAuthorrevor
    • CommentTimeOct 29th 2021
    Looks like a pretty standard item fitted something similar in size to a vac a while ago. Have you a local electrical shop that do repairs they are likely to have a selection and may be willing to sell you a set.
    • CommentTimeOct 29th 2021
    Posted By: revorHave you a local electrical shop that do repairs

    I remember them, in fact I used to work in one whilst I was at school. :bigsmile: But I don't think we've got any electrical shops at all now, let alone ones that do repairs. There are some appliance repair places though; it might be worth asking them?
    • CommentAuthorRex
    • CommentTimeOct 29th 2021
    Thanks for the replies.

    Have a Euro something locally but they are only interested in fridge and washing machine sales.

    There is a Repair Cafe some distance away, but my guess is, they will know less that I do and I am able to repair it, just need the part.

    Will give Parkside a call but not holding my breath. Agreed that the best way is to buy a pair for the few £s that they cost and in all likelihood, they will fit. But if not, not a great loss.
    • CommentAuthorRex
    • CommentTimeOct 29th 2021 edited
    Kinda dumb question but a carbon brush, such as this,


    does the brass (or is it copper) disk at the end just make spring pressure contact with the fitting at the top of the part in my photo? Or would it be a soldered length of wire?

    If the former, certainly, I could sand the brush to fit the holder.
    • CommentTimeOct 29th 2021
    Posted By: Rexdoes the brass (or is it copper) disk at the end just make spring pressure contact with the fitting at the top of the part in my photo? Or would it be a soldered length of wire?

    I think the brass disk is just there to hold the spring in place, and to provide a good contact surface onto the housing.

    If you needed to reduce the cross-section of the brush, you might also need to reduce the size of the disk a bit too, so it will fit in the housing.
    • CommentAuthorEd Davies
    • CommentTimeOct 29th 2021
    • CommentTimeOct 29th 2021

    everything after the ? is usually tracking junk
    • CommentAuthorGareth J
    • CommentTimeOct 30th 2021
    As above, measure yours, then look for a listing that has dimensions on it ignore model and brand at this point. Then, hopefully you'll find a listing that says something like "6x8x20mm carbon brushes, 408 Flymo" or whatever. Then you can widen your search and look for just "408 Flymo brushes" and buy some you feel are decent quality.

    (The numbers and brand is totally made up)

    Failing that, go oversize. They file and sand very easily.

    While you have it open, check bearings for smoothness/play.

    Prior to 2017, vacuum cleaners had large and inefficient motors and fans, because consumers chose "the most powerful" ones. Even if most of that power was emitted directly as heat and noise without first becoming suction!

    Many models were redesigned when the product efficiency regulations came in, replaced by models that do the same job but with much less energy consumption. (Edit- the regs require 98% of dust to be picked up with less than 900W power consumption. They used to require efficiency labels A-G, this was suspended a few years later due to legal actions, but the efficient motors are still being used)

    It perhaps might be a false economy to repair rather than replace an energy-hungry vacuum cleaner? A bit like repairing an incandescent light bulb!

    It would be great if we could buy a new efficient motor and fan and keep all the plastic body bits, but that's unlikely to happen.

    I fell in this trap by replacing the brushes in our old washing machine. It was a lot of work and my satisfaction quickly wore off as other components wore out soon afterwards (door lock and then drum bearings). We replaced it, and the new one is much more economical to run and quieter.
    • CommentAuthorRex
    • CommentTimeOct 31st 2021
    Thanks for the comment and links. I sure one of the 12 x 6mm brushes would be OK when filed, but I have not bought a pair of what look like the same cassette type for only a couple of quid and now await delivery.

    The bit of wire the was left in the cassette looks like it was soldered to the top fitting rather than a sick contact.

    If it does not work, not a major financial loss so will look at replacing.
    Posted By: Rexdoes the brass (or is it copper) disk at the end just make spring pressure contact with the fitting at the top of the part in my photo? Or would it be a soldered length of wire?

    The brass disk is fixed to the wire (soldered or spot welded) and it is the disk and wire that provides electrical conduction to the brush. The spring should play no part in the electrical connectivity, it is just there to provide the necessary pressure of the brush to the commutator.
    • CommentAuthorCWatters
    • CommentTimeNov 1st 2021 edited
    Perhaps ask this seller if it fits the 30/7. Its advertised for the 30/4 but they may use same motor.

    Has dimensions.



    Fits e.g. for vacuum cleaners with Domel motor 7778-5
    Parkside PNTS 30
    • CommentAuthorRex
    • CommentTimeDec 26th 2021 edited
    Just thought I would give a Boxing Day heads-up.

    After one failed delivery of the brushes from China, a fleaBay refund and trying again, the brushes finally arrived just before Christmas.

    Fitted them this afternoon, but of course, they would not fit. Took advice from above, removed the carbon and spring from the new housing, sanded it down to fit into the original housing, reassembled everything and the vac is working again.

    Brilliant result and many thanks for the advice.

    Happy New Year to all
    • CommentAuthorRex
    • CommentTimeJun 10th 2022
    Sorry to revive this thread but .....

    Although I fitted the new brushes some time ago and the vac worked, from the get-go, it was making a noticeably different sound and after a few minutes, a very distinct smell of ozone.

    Today, I have dismantled it again to see if there is anything untoward, and as far as I can see, all is fine. However, when running, there is some big-time sparking from the brushes and the commutator is very black.

    The brushes appear to be worn to the commutator profile so I believe are making good contact. Is it possible that my Chinese cheapie brushes are just that or is one carbon brush pretty much like another carbon brush?
    • CommentAuthortony
    • CommentTimeJun 10th 2022
    Ozone forms when there are sparks, clean commutator and fit new proper carbon brushes
    • CommentAuthorRex
    • CommentTimeJun 10th 2022
    Thought they were proper carbon brushes but may be wrong. Who knows what the Chinese put into them?

    If it is the brushes, amongst other things, trying to find what was wrong caused an RCD to trip so think it is time for the dump. Have had it around 12 years and it has had quite a lot of use. Now to research what is available.

    • CommentAuthorcjard
    • CommentTimeJun 12th 2022
    >can't be bothered to work out what's actually needed

    @Ed in an eBay url, everything upto the first question mark should be fine :)
    • CommentAuthorcjard
    • CommentTimeJun 12th 2022
    >The brushes appear to be worn to the commutator profile so I believe are making good contact

    Is the commutator round? if part of it has overheated it may have distorted slightly meaning the brushes bounce when flicked by the oval part. The loss of contact causes sparking, heating and more distortion

    If you go to the dump, keep an eye out for another vac; I've managed to bring 4 dysons home from my local tip so far, only one was properly burnt out; the others just needed dismantling, unblocking, and or seals and belts repairing/replacing - if you're saving one vac from landfill it doesn't necessarily have to be your park side one :)
    • CommentAuthorRex
    • CommentTimeJun 18th 2022
    Removed the brushes to check them and they looked fine. Upon reinstall, and testing, an RCD on the main switch board flick off.

    So figure it was time to take to the dump. As it happens, my favourite tool shop, Lidl had wet/dry vac so have bought one. Not quite so convenient as it does not have a 13a power through socket but I can live with that.

    Must admit, it almost breaks my hear to throw away a perfectly good item, just because something trivial on the brushes is unrepairable. And when one sees the amount of stuff in the skip, what kind of society have we created?

    On a different but disposable topic, my lovely Dell UltraSharp monitor stopped working recently. I have reluctantly bought a larger replacement, but decided to investigate the inside of the old one. Seems the main capacitor on the incoming poser circuit is a common monitor problem and yes, that was obviously the issue. A £5 cap from eBay, bit of soldering and it works again (almost!!!) Unfortunately, in struggling to remove the bezel, I evidently applied too much pressure to the screen so now have an area of dead pixels that radiate vertical and horizontal lines; so I guess it will be destined for the dump.
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