Date: Mon, 20 Mar 2000 22:29:52 +0100 From: Robert Brown <rjbnopsamnetNOSPAM.se> Subject: Re: Front Brake Pads
Hi, Pls excuse what may be an obvious point, but are you checking to see that the whole outer yoke can slide back and forth? Try the following tests, being careful not to push the pistons too far outward: Push the piston for the inner pad into the housing, using a piece of wood as a lever (careful not to damage the dust seals). The piston on the other side (inboard) should push the yoke towards the car's centre line (as if to pull the outer brake pad against the disk). You can check movement the other way by wedging a piece of wood between the outer surface of the disk and the yoke (where the outer brake pad would sit) and twist it to get the yoke to move towards the outside of the car. Once you've established that both brake pistons and the yoke move, then installation of the pads should be easy. But it almost sounds as if the inner piston (the one that drives the yoke towards the car's centre line) on your brake is frozen. I've had that problem twice: once, because I was mucking around too much and managed to drive the piston out too far; the other time, because I hadn't changed my brake fluid in 5 years and the piston had rusted as a result. I also have had the situation where the outer pad had worn down to nothing (just the metal plate left) and this had caused the inner piston to hop out. I pulled apart the brake, redid all seals, lubricated yoke contact points with copper grease etc, refitted and bled hydraulics. Worked just like new. Again, excuse me if I'm stating too much of the obvious ;-) BTW I'm assuming that the 1986 brakes are Girlings (the same as on the 1983 non-turbo). Tell us how it goes. Regards, Robert 1983 900 GL, 1999 9-3, 1983 99 GL (scrapped 1998) Jeffrey Martynuska wrote: > I've tried screwing in the piston as per Saab repair manual, tried > clamps, prybars, nothing seems to work. Am I missing something? - or are > the calipers bad? > > TimeRangernopsam.com wrote: > > > > On Sun, 19 Mar 2000 16:39:45 -0500, JPM <jeff95pgtnopsamail.com> wrote: > > > > >I have the front brake pads removed, but do not have enough clearance to > > >install the new outboard pad. I have screwed in the piston and have > > >enough room to install the inboard pad. Any suggestions would be > > >helpful! > > > > > >1986 900 Turbo > > > > You need to compress the piston even further. I usually use a large > > pair of Channel Locks or even a "C" clamp will work. > > -- > > "Our eyes and hands and feet will give us the same assistance in doing > > mischief as in doing good; but it would not therefore be better for the > > world, that all mankind were blind and lame. Arms are not to be laid > > aside by honest men, because carried by assassins and ruffians; they are > > to be used the rather for this very reason." > > > > -George Campbell (1719-1796)
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