I just measured mine and it is 3-7/8"
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| Cooper S Dynamo pulley diameter https://www.ausmini.com/forums/viewtopic.php?f=2&t=53906 |
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| Author: | 66S [ Wed Jun 03, 2009 10:54 am ] |
| Post subject: | Cooper S Dynamo pulley diameter |
Hi guys, Apparently, the pulley on UK Cooper S dynamo's (generators) was larger in diameter than regular Mini pulleys. Has anybody got knowledge of this difference? Regards Al |
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| Author: | drmini in aust [ Wed Jun 03, 2009 12:39 pm ] |
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Yep, they were bigger here too. (I think maybe on the 997-998 Cooper also?) That's why a Mk1 S takes a longer fan belt... 850 instead of 813. Minis with alternators run an 825. |
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| Author: | 66S [ Wed Jun 03, 2009 1:04 pm ] |
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Hi Kev, Do you have one you could measure at all please? Regards Al |
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| Author: | Wombat [ Wed Jun 03, 2009 1:12 pm ] |
| Post subject: | |
Was there a difference between Cooper S dynamos and other Mini dynamos? - I have a generator at home I can measure but it was off an 850 |
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| Author: | 66S [ Wed Jun 03, 2009 1:28 pm ] |
| Post subject: | |
Hi Dave, The dynamos (generators) were the same, it was the pulley that differed. I'm figuring the S pulley was 3-5/8" or 3-7/8" but hopefully someone will be able to have a measure-up. Al |
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| Author: | drmini in aust [ Wed Jun 03, 2009 1:43 pm ] |
| Post subject: | |
66S wrote: Hi Dave,
The dynamos (generators) were the same, it was the pulley that differed. I'm figuring the S pulley was 3-5/8" or 3-7/8" but hopefully someone will be able to have a measure-up. Al I did look in the Mini King parts book but he doesn't list it. |
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| Author: | 66S [ Wed Jun 03, 2009 2:10 pm ] |
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Hi Kev, Knowing Joe Lucas, the correct pulley is likely to be a common one and shouldn't be too hard to find. Regards Al |
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| Author: | Morris 1100 [ Wed Jun 03, 2009 6:49 pm ] |
| Post subject: | |
I just measured mine and it is 3-7/8"
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| Author: | John Smidt [ Wed Jun 03, 2009 7:53 pm ] |
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drmini in aust wrote: 66S wrote: Hi Dave, The dynamos (generators) were the same, it was the pulley that differed. I'm figuring the S pulley was 3-5/8" or 3-7/8" but hopefully someone will be able to have a measure-up. Al I did look in the Mini King parts book but he doesn't list it. You are correct Kev I did not include the S pulley  Originally there were two types of pulley, One for 850 - 997 & 998, Original Part Number was 12A34 which superseded to a cast iron pulley AYG 9029 The other pulley was for the 1275 Original part number 12A34
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| Author: | Aussie Brian [ Wed Jun 03, 2009 9:41 pm ] |
| Post subject: | |
close your wallet i can't read the tape |
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| Author: | Mick [ Wed Jun 03, 2009 10:15 pm ] |
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I think the Balrog lives in there Morris... |
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| Author: | Morris 1100 [ Wed Jun 03, 2009 10:18 pm ] |
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See what happens when you stick a tape measure into an engine bay on a dark rainy night and let off a flash. I would bet that the spider webs are from redbacks. 
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| Author: | Fiji [ Wed Jun 03, 2009 10:22 pm ] |
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i rekon some hand measurments would be more accurate  .
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| Author: | Morris 1100 [ Wed Jun 03, 2009 10:33 pm ] |
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Fiji wrote: i reckon some hand measurements would be more accurate
.Here you go... 
I still can't see how that will help though? 
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| Author: | 66S [ Thu Jun 04, 2009 5:55 am ] |
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Hmmm, dirt under the nails, must own a Mini. Al |
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