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Date:         Mon, 15 Dec 1997 15:56:47 -0700
Reply-To:     "Michael A. Radtke" <m.radtke@ELM.AZ05.BULL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.sdsc.edu>
From:         "Michael A. Radtke" <m.radtke@ELM.AZ05.BULL.COM>
Subject:      Re: Air in Brake Circuit
Comments: cc: Mark Hudgik <mhudgik@THE-SPA.COM>

Mark,


I am positive the problem is not at the bleeder screw.  And, I used a wrench.


Since my last post, two other things have come to light.


1) I think that I can test the master cylinder itself by disconnecting the
   offending brake circuit and attaching a hose to that master cylinder
   connection.  Drawing a slight vacuum on that hose must produce only
   brake fluid, and not air.


2) It was suggested that hydraulic brake light switches have been known to
   act as check valves.  I swapped these switches from my old master
   cylinder, so they are not new.  I can reverse their positions and see if
   the problem stays in front, or moves to the back.


Thanks for your thoughts,
Mike
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