<VV> questions on throwout bearings

[BobHelt@aol.com]

Hi everybody,
Recently there was someone asking about the lengths of the EM and LM throwout 
bearings (clutch release bearings). There were some responses and after that 
I got to thinking. So I measured two LM factory original bearings I have and 
discovered that there is more to this question than first thought.

The 1964 Shop Manual supplement lists these lengths, but Clark's lists two 
different lengths in their catalog. To compound the confusion, Ken Hand measured 
his supply and found two conpletely different lengths. Then I measured my 
factory supplied bearing lengths and got something different yet. See the table 
below.

So what is going on?

Well apparently, the bearing lengths don't make much difference. The fork is 
pivoted on the ball and has the freedom of considerable movement. So as long 
as the bearing movement allows for it to be retracted from pressure plate 
contact with the clutch engaged, and also allows sufficient movement to depress the 
PP fingers about 3/4 inch everything works OK. All of this seems to be 
accommodated within the adjustment features allowed.

Anybody got any additional information or comments?

                        EM          LM

'64 SM                 1-7/8           1-1/4    
Clark's                    1-5/16         1-7/32
Ken Hand             1-7/16         1-5/16
Bob Helt                 -----           1-11/32 (1966 140 hp)
                         -----           1-7/32

Regards,
Bob Helt