The banner above is an advertisment - if it asks you to download software, please ignore.
Site News - 3/26 M Car Covers (by State of Nine) | 12/12 Make Amazon Pay Saabnet!
Date: Wed, 22 Mar 2000 01:01:16 +0100
From: Robert Brown <rjbnopsamnetNOSPAM.se>
Subject: Re: Rebuild kit for front caliper?


Hi, embedding below: Gary Hack wrote: > Loud substantial clunk?? If there is enough wear between the yoke and cylinder housing, then you'll get the "clunk". That clunk never sounded soft or insignificant once I finally got it. Loud, yes. Substantial, yes. > > Thanks (ain't got anyone to ask around here) > Gary > > On Tue, 21 Mar 2000 21:26:46 -0000, "simonj" > <simonjnopsamzz.net.spambuster> wrote: > > > I have yet to find a 900 that doesnt clunk when braking reversing. Except when reconditioned front brakes are installed, which I finally did on my 1983 900 ;-) It's a foible with the Girling brakes. The sliding surfaces on the the yoke are subjected to a lot of wear since the outer pad is pulled downward, at the same time the yoke moves towards the centreline of the car, when braking. The open design is susceptible to collecting lots of grit, which gets between the sliding surfaces and accelerates the wear. Not such a great design but it's simple and it works. A small amount of play is OK, but if you can get the yoke to really flap up and down (pulling it up and down with brake pads out), then it's time to replace the whole assembly or weld a small thin shim onto the inside of the yoke to restore the original gap tolerances. Get a specialist to do it, because there's the risk of getting the tolerances too fine so that the yoke freezes in place, which will cause the outer pad to drag on the disk. Lovely orange colour, very hot. I once had a sticking yoke and after a trip across town it didn't smell too good either. > > > > >Gary Hack <hacknopsamct.ca> wrote in message > >news:Vg=XOJNKQhAdEFEfy6tWO2sRaIHBnopsamcom... > >> > >> I just purchased a well preserved 85 900 turbo. Needs very little, but > >> it does clunk when breaking in reverse. Is this what you are talking > >> about? > >> > >> I assumed that there is a caliper pin missing or broken, but haven't > >> had a chance to look at it closely. No caliper pins here, but a big u-bolt that does the same thing. There is a way of deforming the bolt so that it positions the pads a bit higher up, bringing the yoke up a millimetre from its normal resting place. So when you brake after reversing, the bottom inside edge of the yoke doesn't slam upwards into the cylinder housing - it's basically already up there. But it's a real Q&D and tricky to get it right. I found that the pads would not slide along the bolt properly when releasing. More smoke . . . What you *can* do is go to your friendly Saab parts dealer and ask to *see* a replacement unit. Chances are that it's a reconditioned one, in which case you'll be able to see the shims that will have had to be installed on the sliding surfaces of the yoke. Get your brake mechanic to do the same on your unit(s). By the way, if it's a problem with only one of the brakes, it's OK to replace just one. Just make sure that the other one is cleaned up so that it brakes with the same power as the reconditioned one. New pads on both brakes afterwards of course ;-) Tell us how it all works out. If you're not so experienced with working on brakes, get a mechanic to check your work before you put the family into the car. Regards, Robert Gothenburg

Return to Main Index
StateOfNine.com
SaabClub.com
Jak Stoll Performance
M Car Covers
Ad Available

The content on this site may not be republished without permission. Copyright © 1988-2024 - The Saab Network - saabnet.com.
For usage guidelines, see the Mission & Privacy Notice.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]