The BSA A7-A10 Forum
Technical (Descriptive Topic Titles - Stay on Topic) => Gearbox, Clutch, Primary => Topic started by: petertriumph on 19.10. 2012 09:23
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Hello. I seem to be the lucky owner of a Triumph 4 spring clutch hub / adaptor with the swivel cut the wrong way around, having the effect of rapidly emptying th chain case of its oil.
Does any one know a quick fix for this problem? Is the swivel really necessary - I thought about filling it with araldite?
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G'day Peter, you could fill it with JBWeld then cut a new groove the right way. Or make up a proper seal, think someone here has done it.
Cheers
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On the 6 spring the scroll is pressed on, so it's just a matter of buying a new scroll piece, not expensive.
Is the scroll part of the 4 spring clutch centre then?
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Hi Muskrat. Whats JB weld? I've asked the guy in the local bike shop, and he said to braise it, and that he couldn't cut the spiral on his lathe because that would mke a V shaped groove (as opposed to the original flat bottomed groove) and this would not be as effective. Do you think this would make a difference to the oil retention?
Any Idea where the 'proper seal' post is? I have enough problems just making a post - let alone anything else!
Thanks for the help,
Peter.
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There's a few posts try this one?
http://www.a7a10.net/forum/index.php/topic,5117.0.html
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It is an epoxy paste with wine ground metal dust in there.
Normally you get it from bearing shops rather than auto parts shops as it was originally used to build up worn shafts under oil seals
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Hi Peter,
The pattern "wrongway" adaptor you have is soft enough to turn in a lathe!
I would machine away the groove entirely, then make a new centre piece for the sliding plate with a smaller hole
Attached are a couple of photos of how I overcame a similar issue
The shoulder on the adaptor keeps the quad (X) ring in place, no more leaks,
I had to add a breather hole to the filler cap as the seal was so effective *eek*
HTH
John
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Hello John. Thanks for the pics - A great help. I don't suppose this is a piece we can buy off the shelf ? Unfortuntely I've no lathe - but I'll show it to the local mechanic - see if he can knock one up for me.
By the way we spoke before about converting a GSXR clutch. Well, I've ended up with a Triumph 4 spring (again due to lac of machining facilities) which works very well - so far. No slipping ,draging ,easy to find neutral , only the oil problem!
Thanks again,
Peter.
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Hi Peter,
The Suzuki clutch conversion is still ongoing, not enough time to work on my own bikes with customer jobs in the workshop ( I suppose I shouldnt complain too much *conf*)
Cheers
John
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John, with your modified sliding plate (a close fitting bush) don't you have problems with the adapter rubbing against the bush?
Doesn't the scroll hold oil hence lubricating the surfaces.
Just a thought,
Peter.
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Hi Peter,
If I remember correctly theres enough clearance between bush and adaptor something like 0.005in
The quad ring keeps the plate central on the adaptor, and runs on the plain part of the adaptor, or on the machined portion after removing the wrongway scroll, This then needs a smaller diamater quad ring and sliding plate piece to suit
The primary case oil seems to lube the ring enough and it hasn't leaked in something over 10 years of use
I had the clutch off recently for another issue and there was no evidence of rubbing problems
I had to play around with the thickness of the cork gasket that I used instead of the felt ring so as the quad ring
was nicely sandwiched between the plate and adaptor
That said I always check how well the adaptor sits in the plate (on all the A's I work on ) and tap the plate about so it turns freely
Hope this is understandable ? if not keep asking
Regards
John