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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book.

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    • CommentAuthorCWatters
    • CommentTimeOct 25th 2013 edited
     
    Just had our Bosch Washing Machine fail on us. Took the motor out (reasonably easy job) and discovered the brushes were really badly worn. So bad that the braid feeding them had become exposed on the rubbing face. This has badly scored the commutator. Looks like a new motor job costing wrong side of £160 (parts only) rather than a simple brush replacement at £10-15. If you had to pay an engineer call out to replace the motor it might not even be economical to fix the thing at all.

    Green moral of the story... If your machine is say three years old and you are handy with a torx screwdriver to get the back off the machine it might be worth checking the brushes to see how worn they are before they get this bad.

    It should be possible to extract one of the brushes to inspect it without having to tip the machine over or remove the motor. The other brush will probably have similar wear so if one is worn whip the motor out and replace them.

    There are videos showing the process on youtube.
    •  
      CommentAuthorSteamyTea
    • CommentTimeOct 25th 2013
     
    What model, I have a Bosch that is about 3 years old.
    Under the new EU rules, it is the responsibility of the retailer to replace goods if they do not last. Got a full refund and £100 from Tesco when my last one failed after 18 months.
    • CommentAuthorsnyggapa
    • CommentTimeOct 25th 2013
     
    I have a bosch motor, are they almost universal?

    Drum cracked so motor should still be good
  1.  
    Posted By: SteamyTeaWhat model, I have a Bosch that is about 3 years old.
    Under the new EU rules, it is the responsibility of the retailer to replace goods if they do not last. Got a full refund and £100 from Tesco when my last one failed after 18 months.


    Lets not give the EU any credit here where they don't deserve it, we already had legislation that was superior to what they asked their member states to introduce....... we have the Sale of Goods act 1979 (as amended).... it doesn't entitle you to a full refund after 18 months and definitely doesn't entitle you to £100 extra, if a retailer chooses to do so then great but that's them doing it out of their own goodwill rather than legislation forcing them! I suspect its one of those situations where Tesco can appear to be the good guys by pleasing the customer and billing their supplier for all costs incurred.

    Entitlement would be for a repair or a _partial_ refund if it could be shown (onus on consumer after 6 months) that there was some defect with the goods present at time of manufacture (brushes being made out of inappropriate material/not seated correctly etc) as opposed to just having a lifetimes use (i.e. you put a coin meter on it and used it in a laundrette).

    Sorry about being short but its force of habit when I hear about misinformation about EU "rules".........

    For the OP by all means try the retailer and the manufacturer but do you know anyone with a lathe that could clean the commutator up maybe?
  2.  
    Happy my LG washing machine has a direct drive motor with no brushes!

    Paul in Montreal.
    • CommentAuthorCWatters
    • CommentTimeOct 26th 2013
     
    Thanks for the offer snyggapa but I wanted to get it sorted quickly as kids were due back today from adventure camp with a weeks worth of dirty clothes. Ordered a new motor on Friday night from Bosch via Amazon. Arrived today (Saturday) lunchtime and was fitted 30 mins later. Fantastic service at a price. Could have got it slightly cheaper had I been prepared to wait up to a week for delivery.

    Just wish I'd checked the brushes 6 months ago. The rest of the machine seems in A1 condition. No play in the drum bearing or any sign of water leaks anywhere so should now be good for quite a few more years I think. Have ordered a spare set of brushes so I can service it in say two years time.

    The originals were 40mm long. had worn down to 10mm or so.

    I had the old motor apart today and although it's scored it might be possible to get the commutator skimmed. If I can find someone to do that I might put it up on ebay or keep as a spare.

    For info it's a Bosch Exxcel 7 Model WAE28467UK/16. I think it's about three years old but it gets virtually daily use so perhaps older than it' years.

    PS: It's quite hard to get a new brush in - The long spring makes it like trying to stuff a live snake into a small hole so probably easier to take the motor out than replace the brushes in the machine.
    • CommentAuthorCWatters
    • CommentTimeOct 29th 2013 edited
     
    Took the armature to an engineering co today and was quoted just £20 to skim the commutator!

    It seems it's still possible to fix stuff cheaply these days. I'm beginning to wish I hadn't rushed to get a new one myself. Could have fixed it for a £20 skim and £8-£15 brushes. Had we got a service engineer in I've no doubt he would have sold us a whole new motor and fitting for say £250 and done the same with the old one.
    • CommentAuthorSeret
    • CommentTimeOct 30th 2013
     
    DC motors with brushes. Yuk. The sooner we're rid of them the better!
    • CommentAuthorCliff Pope
    • CommentTimeOct 30th 2013
     
    I just wrap a bit of coarse emery paper round the commutator and rotate it in my hand to get the worst of the burrs out. Then swap to fine paper.
    If you ever see a scrap washing machine abandoned it's always worth whipping the brushes out.
    • CommentAuthorCWatters
    • CommentTimeOct 31st 2013
     
    Mine was a bit too far gone to do it with emery paper. I thought about trying to spin the rotor in a drill and use a file but not enough of the shaft available to do that. The bearings and a pully were pressed on. The man that did it had a 4 jaw chuck big enough to put the wound part of the rotor in and centrer the com with a dial guage. Took longer to set up than to cut.
    • CommentAuthormarktime
    • CommentTimeOct 31st 2013 edited
     
    I used to have a small workshop servicing steam irons, toasters and hair dryers. Today they are so cheap that people just chuck them away. I wonder if we'll get back to repairing stuff when the resource scarcity kicks in.
    •  
      CommentAuthordjh
    • CommentTimeOct 31st 2013
     
    Posted By: marktimeI used to have a small workshop servicing steam irons, toasters and hair dryers.

    When I was at school, I used to work in the local electrical shop at weekends. Apart from me, there were three (or was it four?) full-time staff in there repairing everything from toasters to televisions. To be fair, they also did installations. It was just a regular neighbourhood shop.
  3.  
    My mothers TV recorder packed up the other day. It just would not power up at all. I decided to have a quick look and the power board had zero volts passing through it. I noticed that one small capacitor had a pin hole through the top so whipped it out. Ebay, 15 pence and its all back working. That little capacitor would have cost most people £150 for a new player/recorder. RESULT!:bigsmile::bigsmile::bigsmile:
    Its worth having a quick look at times but dont kill yourself!!!!
    Dont do it in the bath and take the plug out :wink:
    • CommentAuthorEd Davies
    • CommentTimeNov 5th 2013
     
    Yep, if something's going to be scrap anyway it's worth a quick look inside. Not as clean-cut as Gusty's case but I pulled a couple of wireless routers out of storage the other day and tried to set them up back-to-back this afternoon to boost the Wi-Fi signal I get in this caravan. One had the lights on but was not responding at all so opened the box and found the aerial cable was not plugged into the main board. Fixed that and it still wouldn't work until, at about the 20th attempt, it hard reset OK and now it seems to be working fine including noticeably better range than it had before - aerial must have been off since new.
    • CommentAuthorCWatters
    • CommentTimeNov 6th 2013 edited
     
    The life time of Electrolytic caps is very temperature dependant. Typical lifetimes can fall to only 2000-5000 hours at 85C. Few electronic engineers understand the issue. The life time halves for every 10C rise. For some products the failure rate appears sufficiently high for people to sell kits of capacitors so keen DIYers can replace them when they fail.

    http://www.ebay.co.uk/itm/Thomson-Sky-HD-Plus-PSU-Upgrade-Repair-Kit-/230675107043

    This may also be a concern for LED lights if they have electrolytic caps built in.
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