[Healeys] Throw out bearing

[Michael Salter]

*"There must be some way to adjust."*
No, there isn't any need. The "free play elimination spring" (That's my
name, not sure if there is an official one) inside the slave cylinder
removes any necessity for clutch adjustment...BUT...it is that very spring
that caused so many problems with winter driven TR6's in this part of the
world.
As Kees described
* "Excessive wear on the clutch cover can be caused when the bearing is
just touching the fingers, but not enough to spin the bearing at the same
speed"*
The "free play elimination spring" did exactly that i.e. it caused the
bearing to just touch the fingers of the clutch cover BUT in cold weather
the grease in the bearing thickened up enough to prevent the bearing from
spinning freely which contact eventually caused the clutch fingers to wear
away and break off accompanied by some horrendous noises in most cases!!!
The TR2/6 clutch operating system was a poor design right from the start
and this was one of numerous problems with it but I digress   :-)
Michael S
BN1 #174


On Sun, Dec 18, 2016 at 12:03 PM, Oudesluys <coudesluijs at chello.nl> wrote:

> There must be some way to adjust. Often the rod can be
> lengthened/shortened by adjusting a nut, the slave cylinder perhaps can be
> moved forwards/backwards, shimming etc. I presume the return spring in the
> slave cylinder is strong enough to push back the piston.
> Excessive wear on the clutch cover can be caused when the bearing is just
> touching the fingers, but not enough to spin the bearing at the same speed,
> and/or by a foot resting lightly on the clutch pedal.
> With the clutch pedal released a clutch roller/ball bearing should not
> spin.
> Kees Oudesluijs
>
>
> Op 18-12-2016 om 16:26 schreef Bob Spidell:
>
> "... proper adjustment of the clutch is at hand"
>
> And just how is that done with a hydraulic clutch?*
>
> bs
> * Yeah, I'm being snarky (but half-serious).  Sorry Kees ;)
>
>
> On 12/18/2016 1:31 AM, Oudesluys wrote:
>
> The wear on the "fingers"of the clutch cover is no problem. Nearly all
> cars having a roller/ball clutch release bearing are of this this
> construction. It is slight and when they have gone to far the rest of the
> part is worn as well. Anyway, considerable wear on the clutch cover fingers
> indicates to little clearance and proper adjustment of the clutch is at
> hand.
>
> Kees Oudesluijs
>
>
>
>
> Op 17-12-2016 om 22:44 schreef michael.salter at gmail.com:
>
> Based upon my experience with the TR6 clutch, which uses that system, I
> would be reluctant to make the change. They have a habit of wearing away
> the "fingers" of the clutch diaphragm.
> I have found that the most common cause of carbon release bearing failure
> is a lengthened slave cylinder push rod which causes the bearing to be in
> continuious heavy contact with the pressure plate "platen" at all times.
> Furthermore the pressure rises as the clutch dics wears which exuberates
> (my $10 word of the day) the situation.
> There MUST ALWAYS be free play at the clutch slave cylinder push rod when
> the clutch pedal is not depressed.
> Just sayin'
>
> Michael S
> BN1 #174
>
> From: Bob Spidell
> Sent: Saturday, December 17, 4:05 PM
> Subject: Re: [Healeys] Throw out bearing
> To: healeys at autox.team.net
>
> https://www.ahspares.co.uk/austin-healey/performance-
> parts/Clutch/RELEASE-BEARING-BALL-RACE.aspx
>
> Denis Welch has them, too, but I'm too lazy to look it up for you ;)
>
> Note you have to remove the metal 'platen' on the clutch cover; for some
> reason I'm not totally comfortable with that mod (but no personal
> experience).
>
> Cheers,
>
> Bob
>
>
>
>
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-- 
*If you can't fix it with a hammer, you've got an electrical problem.*
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