[Healeys] Throw out bearing

[i erbs]

The original post was about a Toyota 5spd conversion. One has to make a new
fulcrum bolt for the clutch arm to rotate on and the length of this bolt
effects the length of the arm's movement. It is possible to adjust the
throw out bearing's movement on or off the clutch plate.
[image: Inline image 1]

Ira Erbs
Portland,OR
      _______                                  _______
     (______ \____1959 BN4____/ _______)
         (_________________________)
          BT7 engine and disk brakes

A racing car is an animal with a thousand adjustments. Mario Andretti
Please excuse random auto corrects and misspelled words

On Sun, Dec 18, 2016 at 9:03 AM, 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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