Date: Sun, 31 Dec 1995 19:58:10 -0500
Sender: Vanagon Mailing List <vanagon@vanagon.com>
From: walshp@ippdsgi3.nawc-ad-indy.navy.mil (Pat Walsh)
Subject: Re: Power brake booster on Type II
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,
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
|