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Enjoy.
I'm doing the same. Sachs and TTV racing systems. Even looking at 50s-70s Jeep clutch plates (10 spline - 8.5"). My mind is spinning. Maybe Michael has a solution after he puts out his "work fires."
Is this the release bearing Alpine owners have had problems with or is it a different item?In order to replace the carbon ring affair something like that could be an option:
https://www.ebay.co.uk/itm/Made-in-...56c9430307:g:ae4AAOSwAB5dXGtQ&redirect=mobile
jdoclogan,
You should investigate the mid 70's Volvo four cylinder clutch assemblies. The disk is 8.5 inches with a 1.0 x 10 hub spline. Don't know if the pressure plate would bolt to an Alpine flywheel, but the release bearing would end up being an issue if it could be installed.
Just a thought.
Have fun,
Don
In order to replace the carbon ring affair something like that could be an option:
https://www.ebay.co.uk/itm/Made-in-...56c9430307:g:ae4AAOSwAB5dXGtQ&redirect=mobile
Great sleuthing Bernd.
However, Bob is correct about a roller release bearing. The problem is the original carbon release system has slight and yet continuous contact with the pressure plate component. That isn't a problem for the carbon setup. Albeit it wears out like a brake pad needing replaced. However, for the bearing replacement setup, while it is a good long use with no abuse (leaving foot on the clutch pedal)system, the continuous contact prematurely wears out the bearing. The answer is to put slight tension on the release bearing arm by fabricating a connection for a low pressure return spring. Of course this brings in the engineering design that allows for fine tuning adjustments to the spring load. I'm thinking a configuration with an eye bolt through a plate attached to the bearing release arm. A nut adjusting process with the spring looped through the eye of the bolt and anchored to a solid point.
Continued research and processing is needed.
Doc,
true that could help. Doesn't the Tiger have something similar, i.e. a continuous pull back of the release arm via a tension spring ?
jdoclogan,
Actually, the problem lies in the design of the release bearing movement. The Rootes linkage moves the release bearing in an arc while all bearing type release units move coaxially with the trans input shaft and pressure plate. The Rootes arc causes the release unit to move laterally away from being coaxial. This would make the pressure plate fingers laterally shift out from a concentric alignment with the bearing face leading to difficulty rotating the bearing and sliding wear on the pressure plate fingers and bearing face.