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Clutch thrust bearing

Discussion in '456/550/575' started by LjT, Apr 23, 2020.

  1. LjT

    LjT Karting

    Feb 26, 2013
    135
    Hi guys,

    My 550 clutch bearing is toast. Clutch plate still very healthy. Do you guys change the other parts as well when you are in there? Example, flange sleeve, etc?

    Regards

    LJT
     
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  3. Motob

    Motob Formula 3
    Professional Ferrari Technician

    Nov 11, 2003
    2,182
    Berkeley, CA
    Full Name:
    Brian Brown
    Which bearing are you talking about? The throw-out bearing? If so, I would recommend replacing it with a Hill Engineering unit, they are a better quality unit and come with all of the seals already installed.

    Carefully inspect the surface on the flange where the throw-out bearing rides, If you can feel any wear on the sleeve surface or see wear through the plating/anodizing to the base metal, then it needs replacement.

    The other thing to check is the clutch shaft bearing inside the bellhousing. It is a good idea to replace this bearing and inspect the bellhousing for wear. The bearing is only held in place with a snap ring, and I have seen multiple cars where the outside of the bearing spins in the bellhousing causing wear to the bellhousing. The last 550 clutch I did had at least .050" of wear in the bellhousing, allowing the clutch shaft and bearing to move all over the place. a new bellhousing was $4000+. We had to have the original welded and machined.

    Brian Brown
    San Francisco Motorsports
     
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  4. Motob

    Motob Formula 3
    Professional Ferrari Technician

    Nov 11, 2003
    2,182
    Berkeley, CA
    Full Name:
    Brian Brown
    Don't forget to replace the pilot bearing in the end of the crankshaft. And neither the original Ferrari throw-out bearing nor the Hill bearing come with the roll pin installed that keeps the bearing from rotating. You can lever the roll pin out of the old throw-out bearing with a pair of side-cutters and reuse it, or order a new pin.
     
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  5. tazandjan

    tazandjan Three Time F1 World Champ
    Lifetime Rossa Owner

    Jul 19, 2008
    33,063
    Clarksville, Tennessee
    Full Name:
    Terry H Phillips
    Once you go to all the trouble of getting to the throw-out bearing, would it not make sense just to change the clutch, too? A lot of labor involved for just changing the T/O bearing, even with flange and pilot bearing thrown in.
     
  6. LjT

    LjT Karting

    Feb 26, 2013
    135
    Thanks very much Brian and Terry for the precious feedback. What is the part no of the pilot bearing in the Clutch Control diagram? Many thanks

    Regards

    LJT
     
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