On Sun, 31 Dec 1995, Pat Walsh wrote:

> derek@best.com (Derek Au) writes:
> >And maybe someone could help me out here, I'm going to retro-fit the brake 
> >booster servo and master cylinder from a '71 vintage vanagon.  I've already 
> >purchased the servo (yow! that was expensive!) the master cylinder and 
> >vacuum line check valve.  I figure I'll have to fabricate and mig weld a 
> >special bracket to mount the booster/master cylinder assembly and then run a 
> >vacuum line to the engine compartment.  I plan to use copper tubing, cause 
> >it does'nt rust and is available!  I have a question though, does anyone 
> >know why there seems to a second vacuum line connection on the brake 
> >booster, right where the operating rod from the brake pedal goes into the 
> >brake booster?  This is in addition to the vacuum connection thats on the 
> >large round housing of the booster where vacuum is usually connected.
> I have a '71 Westy and am trying to hook my booster up as well.  Since it
> was disconnected when I bought it, I don't have much to go on other than the
> various manuals (which aren't that clear).  I noticed the two connection
> locations, too, and posted to the list but didn't get a response.  On mine,
> it looks like the REAR one goes to the manifold, and the FRONT one had a
> hose (disconnected) near it that disappeared into the frame (?!).  It's just
> a guess, but maybe the front connector is a vent, to allow air in and out as
> the diaphragm moves back and forth?  The hose might just be to keep water,

>From what I can tell on my '71, the front hose seems to go over the 
booster and back to the filler behind the driver's seat for brake fluid. 
I could be wrong. It's snowing here and my butt started getting cold and 
wet. I'll check again next time there's dry ground. I've got a leaky hose 
up there I need to fix anyway. If you don't hear from me soon (this week) 
on this, please remind me. Thanks! Joe

> etc. from getting in.  (Incidently, when I hooked my new hose up to the REAR
> connector and blew into it, there wasn't much resistance.  I thought the
> diaphragm might be broken, but the air feels like it's coming out around
> the master cylinder.  There's supposed to be an O-ring around the MC, so maybe
> that's all.  Any ideas?  I decided to wait for Spring to take things apart.)
> 
> Pat Walsh, '71 Westy, walshp@ippdsgi3.nawc-ad-indy.navy.mil
> 

----------------------------------------------------------
Joseph F. Fournier II <jfourni@comp.uark.edu> 501.575.7353
<a href="http://comp.uark.edu/~jfourni/"> Joe Fournier</a>
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| "If a thing worth having is worth working for, my bus  |
|  must be worth it's weight in gold."  -- me    \/      |
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