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Brake Pipe Unions


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#1 533clive

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Posted 07 August 2018 - 05:45 PM

Started taking my '88 mini apart today, and found that off the brake master cylinder ONE of the unions (the lower one) was larger than the standard 11mm (3/8). A 13mm spanner fitted it and it's off, but why just the one different one?
And also, where can I find a replacement Union, as I'm re-doing all the brake lines?

Any help gratefully received

Clive

Edited by 533clive, 07 August 2018 - 05:48 PM.


#2 nicklouse

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Posted 07 August 2018 - 06:22 PM

the standard is not 11mm. 3/8unf

 

and yes there is one metric thread so you fit the pipes correctly. M10

 

and most Auto suppliers have them. Minispares for instance.


Edited by nicklouse, 07 August 2018 - 06:23 PM.


#3 Moke Spider

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Posted 07 August 2018 - 06:25 PM

I think they did the different sizes so that the lines can't be mixed up, which I think you'd be going pretty hard to do.

 

The Tube Nuts shouldn't be too hard to find at all, CBS, Somerfords, Mini Spares and even your local Brake Shop should be able to supply them.

 

Be aware that these Tubes Nuts for the Yellow Tag Master Cylinder M10 x 1.0 and M12 x 1.0 respectively. Most other fittings in the cars are 3/8" UNF.



#4 533clive

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Posted 07 August 2018 - 06:34 PM

Brilliant, thanks very much for that info. Nothing's ever simple is it................




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