Sorry to jump in here guys, but you may like to contact Ivor Phillips
[ivor.phillips@ntlworld.com] as he has just helped me through this very
issue and has some spare sets of seals.
Cheers
Alan
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of N55XS
Subject: Re: Europa-List: Brake trouble
Richard Holder wrote:
>
>
>
>Sorry to say this, but you won't have working brakes for more than a
>year or two - or possibly less.
>
>The standard seals in the Jamar twin master cylinder are designed for
>the use of automotive brake fluid Dot 3, 4 or 5.1. If you use ATF (or
>the mil-spec aviation brake fluid) the seals will deteriorate.
>
>The bad news is that the standard seals in the callipers are designed
>for ATF (or mil-spec aviation fluid) and if you use DOT 3, 4 or 5.1
>THEY will deteriorate.
>
>This is why the factory specifies DOT 5 - silicone brake fluid which
>will not affect either types of seal.
>
>I have decided to go Automotive - thanks to the help of Ivor Phillips
>of this List. I had already messed up (testing) my master cylinder
>seals with ATF so he provided me with new seals for the master
>cylinder, the callipers and the Matco parking brake valve all to work
>with Automotive brake fluid - I will be using DOT 5.1
>
>I admit that at the moment I am using two of the floor based master
>cylinders, with the changed seals for tri-gear use, as finger style
>brakes. I am used to them, but no way can they be described as easy !
>And in fact my co-builder filled the systems up with Automotive fluid
>so I expect part of the sluggishness is due to swelled seals. I will be
>putting in the Jamar dual master cylinder at the time of the annual in
>March. I am researching and getting everything together, ready !
>
>I will increase the power of the internal spring a little by putting in
>a flattened spring washer (maybe 1.5 mm thick) into each bore before
>the spring ( which is followed by the piston ... Etc. I will be sure
>that the spring washer is nice and clean !
>
>Richard
>
>
>
>
Richard,
Do you have specifications for the seals that you used? Or better yet,
manufacturer and part numbers? Thanks,
--
Jeff - A055
Builders Log: http://www.N55XS.com
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