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Thread: What is the brake line layout on a NAS SWB SIII?

  1. #1
    Join Date
    Jan 2013
    Location
    UK
    Posts
    4

    Default What is the brake line layout on a NAS SWB SIII?

    HI guys,

    there is lots of great information on the forum regarding upgrading to dual power brakes and Terri-Anne's site is (as always) a wealth of information.

    However, I'm about to plumb in my new cupro-nickel (Kunifer) brake pipes and brass unions and I have some specific questions about the brake lines.

    I don't want to install a PWDA/Shuttle Valve as they can cause a great number of problems and I like to keep things simple. I understand that the NAS Series III had a dual circuit, servo-assisted brake system but it did without the shuttle valve.

    I believe that the layout would look like the picture I have ever-so-skillfully (!) annotated below. Basically I have joined the front Master-cylinder pipe to a three-way union to feed the front axle and I have shown a single pipe joining the rear Master-cyliner pipe directly to the rear flexi-hose. Does anyone know where I can find a picture of the brake line layout on these NAS vehicles so I can confirm my understanding? I'd like the layout to be stock if possible.

    Many thanks indeed.

    Attachment 7634

  2. #2
    Join Date
    Feb 2007
    Location
    East Granby, CT
    Posts
    1,883

    Default

    What you show is almost exactly what I did when I got rid of the shuttle valve on my SIII Lightweight. Only thing different is that I used a 3-way junction (with one port blocked) to connect to the rear brake pipe.

    Not sure if you can see the lines in this picture:


  3. #3
    Join Date
    Jan 2013
    Location
    UK
    Posts
    4

    Default

    Thank you very much.

    I've read through your rebuild thread in the past and was thoroughly impressed.

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