[T3] Push-rod length...

[Bobsnotch at aol.com]

In a message dated 12/30/2010 6:07:34 P.M. Eastern Standard Time,  
jadney at vwtype3.org writes:

On 30  Dec 2010 at 17:56, Bobsnotch at aol.com wrote:

> In a message dated  12/29/2010 9:21:23 P.M. Eastern Standard Time,  
>  jadney at vwtype3.org writes:

> >  According to the Blue  Bentley (61 to 67), there are 2 basic (starting 
 
> > point)  measurements. The first is for single circuit  master   
cylinders,
> > it's 143.5+ - 5mm. The second basic measurement   is 149.5mm + - .5mm.

> I think we've been down this road before.  It  appears that someone 
> made a mistake in the dimension, at  least for the  tandem MCs. I've 
> never seen a published number  that agreed with the  untampered late 
> pushrods that I've  measured.  
> 
> The number I've  recorded for my own  use is 152-153 mm.

> I just pulled those numbers out of the blue  Bentley. It's actually the  
> starting point for adjustments that  the factory made to each car to 
allow for  
> manufacturing  tolerances. It's measurement is from the tip to the center 
of 
>  the  hole (to attach the brake pedal). You still have to keep the 1mm  
> clearance of  the rod to cylinder.  

It sounds like  the blue Bentley has just repeated the mistakes of the 
past manuals.  Unless your second number was meant to be +- 5 mm 
(rather than .5 mm) I've  never seen one within that range.

If it's +- 5 mm, then it seems odd  that the ones I've measured all 
fall within a small space at the upper end  of that range.

I think we're all in agreement about this being a  starting point for 
a factory adjustment, plus the 1 mm of free  play.




That was my thought too, since the single circuit uses a + - 5mm range.  

Bob 65 Notch  S with sunroof and IRS (Krusty)
71 Notch (Krunchy)
64 T-34 Ghia  (Wolfie)
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