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Thread: Big nut master cylinder

  1. #1
    Night Rider Blocker's Avatar
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    Big nut master cylinder

    Everyone I speak to say you have to have the big nut master cylinder, but no one can tell me why it is necessary.

    Is it because they are period correct, better, serviceable or what?

  2. #2
    Super Moderator Taily's Avatar
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    Period correct. I wouldn't say better in any way except that if you're half way handy with a spanner they are not difficult to re-kit as long as the internal surfaces haven't pitted too badly.
    Nunc est bibendum...

  3. #3
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    You can't get proper PBR alloy replacements anymore either.

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    Night Rider Blocker's Avatar
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    So the big nut units are period correct, but servicing is difficult because lack of parts?

  5. #5
    Super Moderator Taily's Avatar
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    Not inherently difficult, they sometimes need a re-sleeve due to pitting from moisture suspended in the brake fluid setting around the internal seals. I have seen rebuild kits come up on ebay from time to time but not sure on availablity of them new from brake repair outlets. Companies such as Hoppers Stoppers etc would be able to answer that query.
    Nunc est bibendum...

  6. #6
    Night Rider Blocker's Avatar
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    Thanks.
    I have 3 (no nut) cylinders here and deciding if I should really chase a big nut one just so I can be period correct.
    I would rather be driving.

  7. #7
    It's a rockin'
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    power brakes on north east rd will be able to help you, great people to deal with

  8. #8
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    Dr Terry does them too.

  9. #9
    Sandman Driver mook's Avatar
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    I can second power brakes!

  10. #10
    Night Rider Blocker's Avatar
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    Quote Originally Posted by thatotherguy View Post
    power brakes on north east rd will be able to help you, great people to deal with
    Thanks they are just up the street from me, I might see what they have to offer and report back.

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