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Seca 750 master cylinder cap repair

Discussion in 'XJ DIY How-To Instructions' started by k-moe, Jun 16, 2022.

  1. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    The cap/plug for the Seca 750 master cylinder is a plastic bolt with an Allen head. The plastic is soft enough that the Allen socket will eventually wear to the point that you can’t remove the cap. A quick and effective repair is to grab a key one size larger (5 mm is stock, so 6 mm is one size up), heat it with a torch and press it into the head of the cap to form a new socket. It should be good for another 40 years.
     
    k-moe, Jun 16, 2022
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  2. Huntchuks

    Huntchuks Well-Known Member

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    What???
     
    Huntchuks, Jun 17, 2022
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  3. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    The Seca 750 uses a remote master cylinder that is mounted to the triple tree. Instead of a flat aluminum cover it uses a plastic socket-head bolt and an o-ring to seal the reservoir.
     
    k-moe, Jun 17, 2022
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  4. Huntchuks

    Huntchuks Well-Known Member

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    Got it. Melt the plastic socket cap head to the hot allen key.
     
    Huntchuks, Jun 17, 2022
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  5. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Exactly
     
    k-moe, Jun 17, 2022
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