Date: Tue, 06 Jul 1999 20:02:45 -0400
From: "J. Pires" <>
Subject: Re: Brake booster on 84 900 T

Pete... It appears that you diagnosed it right, my booster had a leak around the shaft that presses on the master cylinder. Other than the pedal getting hard, the RPM's at idle with the break applied will also fluctuate. Be ready to spend big bucks for a new booster, I was quoted $500.00 at the dealer, which prompted me to install a used one. You should be able to get one for about $100.00. Leave the lower dash apart, you will need it that way for the replacement job. Good Luck Joe Pete wrote: > Hello, > I have a brake problem I was wondering if I can get any info on. > Here are the symptoms, > > When I first apply the brake pedal, the pedal feels correct and > gives about an inch of motion. > As soon as I touch the brake pedal there is a slight rushing noise > like a leaky vacuum hose. > Very soon after I apply the brakes the pedal becomes much firmer and > pushes back against my foot, at this point there is no vacuum assist. > I've pulled the dash apart and have found that the rubber bellows > around the push rod the brake pedal is attached is where the vacuum noise is > coming from. > The hose to the servo unit look good, and the unit seems to be > holding vacuum as long as I don't press on the brake pedal. > > I am fairly convinced that the problem is a failed booster / servo > unit, I was just hoping to get confirmation before I purchase a replacement > unit. > > Thanks, > - Pete

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