Gearbox shaft O-ring

Discussion in '206/246' started by afer, Feb 11, 2018.

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  1. afer

    afer Karting

    Jun 4, 2009
    116
    Uruguay, S. America
    Full Name:
    Alvaro Ferraro
    I need to change the O-ring that goes were the shift shaft goes inside. It's a 1970 L series car.
    Anybody knows the correct ID and OD of this O-ring ?. Regards, Alvaro
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  2. dgt

    dgt Formula 3
    Silver Subscribed Owner

    Jan 14, 2011
    1,029
    Northeast, USA & Oz
    Full Name:
    Andrew
    Hi Alvaro,
    From my notes, supercedes to Ferrari part #10257060.
    25mm O.D., 2.9mm thick.
    If you look at an o-ring supplier, 3081 is the part as it’s a standard o-ring.

    Regards, Andrew
     
  3. afer

    afer Karting

    Jun 4, 2009
    116
    Uruguay, S. America
    Full Name:
    Alvaro Ferraro
    Thank you very much Andrew. Yes, in the Spare Parts Manual the part is 3081 but
    it's a good info that is the number of a standard O-ring.
    Regards, Alvaro
     
  4. afer

    afer Karting

    Jun 4, 2009
    116
    Uruguay, S. America
    Full Name:
    Alvaro Ferraro
    Hi Andrew:
    I was looking on Internet at an "Italian O-ring sizes" table and it show 3081 with an ID 20,30 mm and CS of 2,62.
    This is very different to the CS and OD you sent me. What do you think?
    Regards, Alvaro
     
  5. dgt

    dgt Formula 3
    Silver Subscribed Owner

    Jan 14, 2011
    1,029
    Northeast, USA & Oz
    Full Name:
    Andrew
    #5 dgt, Feb 11, 2018
    Last edited: Feb 11, 2018
    Ah yes, the sizes I gave came from my notes and these were measured dimensions of the old O-ring and are approximate.
    This was the table I used but I see the company went out of business but there is a backup here:
    https://web.archive.org/web/20160820180102/http://mdmetric.com:80/or/ita2gb.htm

    All the o-rings for 206/246 L-series are in the table above using the standard italian part# from the parts manuals.
    Best, Andrew
     
  6. afer

    afer Karting

    Jun 4, 2009
    116
    Uruguay, S. America
    Full Name:
    Alvaro Ferraro
    Thanks again Andrew. The table I saw is similar and in both tables are the same dimensions for 3081.
    Regards, Alvaro
     
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