Alternator gear rattle - Page 2 - MVAgusta.net
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post #11 of 24 (permalink) Old 11-10-2017, 09:46 PM Thread Starter
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Quote:
Originally Posted by theknurl View Post
You didn't remove the starter.........

Chris Wells posted about doing it that way

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Gidday Noel,
Yep, I pulled the starter
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post #12 of 24 (permalink) Old 11-10-2017, 09:52 PM Thread Starter
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Can I have the link to Chris' post?
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post #13 of 24 (permalink) Old 11-11-2017, 12:36 AM
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Thumbs up ?

Sorry, no link, search "alternator removal " or Chris's posts

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post #14 of 24 (permalink) Old 11-12-2017, 01:45 AM Thread Starter
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OK, swung the frame and pulled the alternator. I have discovered that the inner hub that houses the cush drives is wobbling about and the centre bolt is wound out. Not nice. I have found a peice
of bearing casing also. See photos.
Best way to stop this reoccurring...correct torque and Loctite?? I see that there is no washer with the centre bolt.
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post #15 of 24 (permalink) Old 11-12-2017, 03:22 AM Thread Starter
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I'm going to replace the bearing...should I replace with same bearing (SKF EXPLORER 6005 ???D) or is there a better quality option?
Appreciate the advice.
Thanks
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post #16 of 24 (permalink) Old 11-12-2017, 06:28 PM
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I'd go with a sealed one since the broken pieces of the bearing cage were floating
around

sealed 6005-2RS

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post #17 of 24 (permalink) Old 11-12-2017, 09:15 PM Thread Starter
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Thanks,
Any suggestions on how to prevent the centre bolt from winding out again?
Or maybe, why it did it in the first place as the alternator rattle has been mentioned a few times in the past on this forum and it has been said, that it's nothing to be concerned about etc.
I'm sure glad I investigated the issue.
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post #18 of 24 (permalink) Old 11-15-2017, 07:14 AM Thread Starter
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Purchased and fitted an NSK sealed bearing $8.50AU. It was very easy to remove and re-fit with some heat on the casing. I have used 'strong' Thread Lock on the the Cush Drive Hub centre bolt and torqued it to recommended 25nm.
I'm wondering whether I should put a lockwasher of some sort with that centre bolt. I'm at work for a week so I'll make a decision when I get back home.
Any opinions out there....?
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post #19 of 24 (permalink) Old 11-15-2017, 07:57 AM
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Since you are using Loctite you shouldn't need a lock washer.

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post #20 of 24 (permalink) Old 10-14-2018, 05:05 AM Thread Starter
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Loose Again!!??

OK, so it's been nearly 12 months and a few Trackdays under my belt. I've had to remove the alternator again due to an oil leak coming from that region and my assumption was correct that "O" ring had failed. No problem, replace "O" ring.
I checked the Cush Drive centre bolt and Hub (Engine Side) and it was loose again The centre bolt was not finger tight this time so the Thread Locker I used half worked as there was slight resistance as I unscrewed the bolt.

I'm figuring there's an engineering issue with the design of this component regarding surface area. If you look at the contact area of the head of the bolt to the hub it may be just 50% which I think is the problem.....Any thoughts from the great minds that lurk in this Forum.
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These photos are well within the limits of the website requirements but they look huge on the preview on my computer.... hope they adjust folks
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