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Rebuild kit for 1993 940 master brake cylinder?? 900

posted by  Bill N. on  Sun Apr 17 14:23 CST 2005
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last visit: Sat Aug 16 14:09 CST 2014
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I'm looking for the rebuild kit for the master brake cylinder on my 1993 940 turbo. I just redid the front brakes pads and rotors but I'm still getting a feeling that the pedal has to go down too far. There is not any air in the lines but I'm getting the feeling that maybe the master cylinder need new seals and a rebuild. Any one done this before on a 940??----got a supplier and part number?? Thank ahead of time for the help.








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    Rebuild kit for 1993 940 master brake cylinder?? 900

    posted by  coldstart on  Mon Apr 18 01:23 CST 2005
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    last visit: Mon Oct 6 15:31 CST 2014
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    if you need a master cylinder i have a new one that you can have for 90.00 but i will need your part number bought it for a 95 940 turbo but never used it let me know.








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    Rebuild kit for 1993 940 master brake cylinder?? 900

    posted by  Steve on  Sun Apr 17 16:30 CST 2005
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    I have this sneeking feeling that you will have to bore out the M/C: corrosion invariably affects the inner surface not touched by the seals. Maybe better to buy an already-rebuilt unit.








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      Rebuild kit for 1993 940 master brake cylinder?? 900

      posted by  GustafKalle on  Mon Apr 18 00:41 CST 2005
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      last visit: Sun Sep 2 13:57 CST 2007
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      Agree, have myself tried to renovate, both times failure due to rust in cylinder. Another point: how shure are you that you donīt have air at the top of the inverted U of the rubber brake lines at the front wheel? You need to pump really hard to get all air out, or bending the line to help any trapped bubble out. Does your pedal sink slowly further down to the floor when constant pressure applied, suggesting backleak in master cylinder? Did you manage to totally vent the master cylinder , if you had air in there there are certain ways to do that (should be in the 7-900 FAQs)

      Gustafkalle
      a.k.a rusty Wasserpumpenmann, take my advice accordingly







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