Re: lost brakes - Saab 900 Bulletin Board - Saabnet.com
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Re: lost brakes
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Posted by RadioFlyer [Email] (more from RadioFlyer) on Thu, 13 Oct 2011 10:33:11 Share Post by Email
In Reply to: lost brakes, monte carlo, Tue, 11 Oct 2011 09:32:34
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I had the same problem on my 90 SPG a couple of years ago. It would only happen after long periods in traffic. Got worse over time, especially when I moved to the city. Ended up replacing the entire ABS unit with a good used one and there have been no problems since. I would get it done soon before you lose your brakes in a serious situation. Remember, if you pull over and let things cool for a half-hour or so, you should be good to drive for a while.

Replacement is not as bad as it may look. The ABS unit is the whole mechanism on the drivers side next to the coolant reservoir. It includes the brake master, ABS bomb (accumulator), etc - all the metal brake lines go into it. First, drain the brake fluid at the calipers, then take out the knee-bolster under the dash to access the brake pedal. Where the brake pedal connects to the arm that goes through the firewall, pull the pin out and disconnect all the hoses, brake-lines, and electical plugs from the ABS unit under the hood. Then pull it all free. Installation is the opposite of removal. Then put in new brake fluid and bleed the brakes.I think it talks you through it in the Bentley Manual as well.

Just be careful of the brake light switch by the pedal. It can be pretty fragile if you smack it. The little tabs that secure it break off. It can be held on with a zip tie though if you brake one. Mine is still zip-tied and working after 3 years.

I did this install myself a couple years ago with the help of my wife. Turned out great. Drove the SPG across the country after that with no problems since.

posted by 205.122.2...

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