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Re: Clutch Slave Blues - '86 900S 274k 1 Saabers Like This Post! Posted by Cmyles [Email] (#1126) [Profile/Gallery] (more from Cmyles) on Wed, 31 Jan 2024 07:16:50 In Reply to: Clutch Slave Blues - '86 900S 274k, Bruce Miller, Tue, 30 Jan 2024 13:43:36 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Bruce,
Based on your post I recommend that you buy a slave rebuild kit and a master rebuild kit and rebuild both cylinders, consider replacing the line that connects them, see if the clutch pedal pivot needs re-bushing and then reverse bleed the system. If either of the cylinders has internal damage to it's bore you'll need to get a better one. If you buy a new one take it apart and re-assemble it with new o'rings/seals. (Don't trust a new cylinder to be assembled correctly.) The most reliable cylinders are old OEM ones that are still in good condition internally and can receive new o'rings/seals. When you install o'rings stretch them into place. Don't roll them, they can end up twisted.
Clutch cylinders don't typically introduce air into the system. The usual failure modes are leaking fluid and bypassing fluid internally, either of which reduces the effectiveness of the cylinder. It seems that you probably have both going on.
When rebuilding a slave or master for these cars no machining is required or advised. Clean the hard parts and re-assemble with new rubber parts. The best solution for pitted or damaged bores is to find a better used cylinder.
After pulling out the clutch shaft you must remove the clutch cover, disc and slave as a unit. You'll need to compress the clutch and insert a ring to keep it compressed while removing. If the hydraulics can be made to work momentarily by pumping the pedal that makes the task easier. If not you'll need to resort to one of the other techniques for compressing the clutch (e.g. three fat nuts). You can make the ring from any number of things, e.g thick solid copper wire or a 5 gallon bucket handle. The whole assembly is a tight fit and it can be frustrating to deal with until you've done it a lot. Patience is the key and be sure to refer to the Saab service manual.
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