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PostPosted: Wed Jun 06, 2018 3:10 pm 
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Hi all,
New to the forum, sorry to start off with a question, but here goes.
i have a very old Wolf Bench Grinder, whilst using it today it suddenly stopped and blew the fuse, both in its own plug and an extension i was using.
Changed the fuses switched on and same again. I am i correct in thinking the coil or armature has gone or is it something else. As i say very old so im guessing no parts available or am i wrong.

hope the pictures give you an insight into its age or possible fault.


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PostPosted: Wed Jun 06, 2018 3:13 pm 
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3rd pic, is that damage to the wire from the capacitor?


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PostPosted: Wed Jun 06, 2018 3:40 pm 
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Rorschach wrote:
3rd pic, is that damage to the wire from the capacitor?

Cant see where you mean


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PostPosted: Wed Jun 06, 2018 4:25 pm 
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green wire, bottom left of the last picture, not 3rd, my bad.


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PostPosted: Wed Jun 06, 2018 5:25 pm 
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Ahh, see where you mean now. afraid not, just a collection of 30 years of dust and spiders web.


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PostPosted: Wed Jun 06, 2018 7:37 pm 
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Ok not that simple then lol. What about the capacitor itself, doesn't look swollen, anything leaking out of it?


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PostPosted: Wed Jun 06, 2018 7:59 pm 
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Change the capacitor - at that age it won't be as good as it should be and is often the cause of failed motor starting.

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PostPosted: Wed Jun 06, 2018 8:34 pm 
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Any suggestions where I could go looking for parts.
Cheers


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PostPosted: Wed Jun 06, 2018 9:51 pm 
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Why not buy a new one ?

Mike

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PostPosted: Wed Jun 06, 2018 9:54 pm 
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I'd hate to throw it out if it can be saved, just for the sake of a few parts.


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PostPosted: Wed Jun 06, 2018 11:03 pm 
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I understand you may hate to throw out parts that can be fixed "for a few parts" but sometimes it is better to scrap them and start again.
You first hurdle is what is the value of the capacitor? (Should be printed on it) Once you have found that you can then buy a new one and try it and hope it is at fault. (If you have a multi meter you could check the capacitor, but then again if you had a multi meter would you have not done that first)

Lots of places to buy them, my favourite is ebay. (or if you want to pay too much there is amazon)

New bench grinder, 150w £20, 350w £50

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PostPosted: Thu Jun 07, 2018 7:43 am 
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Everyone so quick to chuck things out. It's a good old solid bench grinder, it has already last many lifetimes longer than an el cheapo. It is totally worth spending a little bit of time trying to fix it, as long as it is economical to do so.


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PostPosted: Thu Jun 07, 2018 9:12 am 
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The capacitor will have a value written on the side - 4uF, 8uF whatever - and you can purchase replacements of the correct value (or near-enough) that will work but won't be the same shape/size as the original one (newer devices are usually a lot smaller, physically).

I'm with the OP here. Older stuff is better built etc and should be used unless they are BER or there are no spares available.

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PostPosted: Tue Jun 12, 2018 3:39 pm 
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Hi again, thanks for the replies. Sorry a bit slow getting back but here is a pic of the offending item. Browsed the net, but unsure of what/which to get, if any.

HELP !!!


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PostPosted: Tue Jun 12, 2018 6:37 pm 
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someone-else wrote:
New bench grinder, 150w £20, 350w £50

If you want a piece of Chinese carp where you need to spend ages balancing the grinding wheels every time you change them and which may last a couple of years(max), then yes. If you want something which works for years, is heavy, quiet and robust then no - £100 and upwards is more like it (take a look at Metabo grinders or even Luna grinders, if you can find them). Sometimes cheap really is nasty

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