Date:         Sat, 27 Mar 2010 12:04:49 -0700
Reply-To:     neil n <musomuso@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         neil n <musomuso@GMAIL.COM>
Subject:      Brake Proportioning Valve: Traps Air?
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Hi all.

Searched but didn't find an answer.

My '81 Vanagon proportioning valve:  http://tinyurl.com/y8q7e3x  is
similar or the same as those used on later T2's. My T2 Haynes says
that some MY's (pre '73?) have a bleeder screw. (there's a nice
drawing on P 130)

I understand the valve design changed within the T2's, and again in
the T3's, but reading of this bleeder screw made me curious.

Are the older T3 proportioning valves prone to trapping air bubbles
when hydraulic system opened/serviced? If so, is there any use in
bleeding valve at the connection(s)?

Likely not I bet. And possibly risky since nut and line might be
"welded" to valve with rust. Something a shade tree might want to
leave alone til' line replacement required.

Neil.

--
Neil Nicholson '81 VanaJetta 2.0 "Jaco"

http://tubaneil.googlepages.com/

http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines