Cylinder in rear ATE brake | FerrariChat
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Cylinder in rear ATE brake

Discussion in '206/246' started by frankwissman, Aug 28, 2025 at 7:58 AM.

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  1. frankwissman

    frankwissman Karting

    May 6, 2006
    65
    Charleston, SC
    Full Name:
    Frank Wissman
    #1 frankwissman, Aug 28, 2025 at 7:58 AM
    Hi, Guys,

    I'm rebuilding my brakes and have hit a snag. The pistons were stuck and on two calipers, I had to block off the fluid passages and use a grease gun to pop the reluctant piston out. Now I must thoroughly clean everything before assembly. One cylinder in the piston, Item 10 in Tav 27, is stuck. The other three came apart easily. There is no access to the retaining clip, and when I use the irreplaceable screw, Item 22, Tav 27, to pull the cylinder out, I just can't with reasonable force. I am unable to locate 10 x 2 mm threaded rod to make a tool, the only thread I can find that size is Acme thread - rats. So - any ideas how to extract the adjustment cylinder?

    Thank you.
    Frank
     

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  2. racerboy9

    racerboy9 F1 Rookie
    Silver Subscribed

    Nov 3, 2003
    2,667
    #2 racerboy9, Aug 28, 2025 at 8:42 AM
  3. frankwissman

    frankwissman Karting

    May 6, 2006
    65
    Charleston, SC
    Full Name:
    Frank Wissman
    #3 frankwissman, Aug 28, 2025 at 12:31 PM
    Thank you - I'm stubborn, but now I know there is a better path than buying new calipers.
     
  4. racerboy9

    racerboy9 F1 Rookie
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    Nov 3, 2003
    2,667
    #4 racerboy9, Aug 28, 2025 at 3:53 PM
    I am definitely a do it your self guy but at 70 years old I am starting to choose my battles a little more. Plus they re-plate the calipers and have a guaranty.
     
  5. TonyL

    TonyL F1 Rookie

    Sep 27, 2007
    4,212
    Norfolk - UK
    Full Name:
    Tony
    #5 TonyL, Aug 28, 2025 at 4:25 PM
  6. swift53

    swift53 F1 Veteran
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    Nov 17, 2007
    8,435
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    Alberto
    #6 swift53, Aug 28, 2025 at 5:37 PM
    Perhaps compressed air and a piece of wood between the pistons will do it. You can always re-insert the loose one, pressurize, and voila'....
    A grease gun lacks 150 PSI. Compressed air has always worked for me, 100%. But then, I have experience.

    There are many other ways, but if above your pay grade, a professional is advisable.
     

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