[TR] Spitfire single rail gearbox clutch mechanism

[Roger Elliott]

One of the manuals (maybe Haynes) shows the clutch plate being installed 
backwards.  I know a couple of people that installed it that way and the 
clutch worked for a short period of time and then failed.



On 8/17/2016 9:29 PM, Tony Drews wrote:
> Check your pilot bushing / bearing too.  My judder (in a TR race car) 
> was caused by a worn pilot bushing, I believe.
>
> Regards, Tony
>
> At 05:22 PM 8/17/2016, Stuart Greenwood wrote:
>> I rebuilt my single rail gearbox and replaced the clutch 10,000 miles 
>> ago but I have been experiencing clutch judder for some time now. I 
>> was going to replace the clutch and resurface the flywheel later this 
>> year but recently I started the engine but when I came to put it in 
>> gear I found that the clutch pedal was absolutely solid... it would 
>> not move.
>> I removed the engine and gearbox and found the release bearing 
>> carrier  had jammed on the sleeve that carries it.  It appears that 
>> the carrier had traveled too far along the sleeve and cocked over  at 
>> an angle and jammed.on the sleeve. Why this happened I don't know 
>> because I am using the correct clutch master cylinder and slave 
>> cylinder so the movement of the rod that is attached to the operating 
>> level should be correct and should not move the bearing carrier too 
>> far along the sleeve.
>> I noticed that the sleeve could be increased in length by a good 1/4 
>> ins since it doesn't reach to the end of the release bearing carrier 
>> and this would presumably stop the carrier from cocking on the 
>> sleeve. I don't understand why the sleeve is shorter in length than 
>> it could be... there doesn't seem to be any problem if the sleeve was 
>> made longer. Has anybody done this ?
>> How good a fit should the release bearing carrier be on the sleeve? I 
>> can wriggle mine about when it is fully back on the sleeve but the 
>> movement doesn't feel to be excessive to me.
>> The clutch is self adjusting in that the release bearing is always in 
>> contact with pressure plate diaphragm finger.  With only 10,000 miles 
>> on the clutch I don't see how the reduced the thickness of the driven 
>> plate would be sufficient to move the release bearing carrier a 
>> significant amount on the sleeve or that the diaphragm fingers have 
>> bent a little.
>> I will check the crankshaft end float to see it that is the problem.
>> Any thoughts on this issue would be welcome
>> Stuart A Greenwood
>> San Diego
>>
>> ** triumphs at autox.team.net **
>>
>> Donate: http://www.team.net/donate.html
>> Archive: http://www.team.net/archive
>> Forums: http://www.team.net/forums
>> Unsubscribe/Manage: 
>> http://autox.team.net/mailman/options/triumphs/tony@tonydrews.com
>
>
>
> ** triumphs at autox.team.net **
>
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe/Manage: 
> http://autox.team.net/mailman/options/triumphs/elliottr@rmi.net
>