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Duel Master Cylinder

Discussion in 'Early CJ-5 and CJ-6 Tech' started by Rick Whitson, Dec 4, 2018.

  1. Dec 4, 2018
    Rick Whitson

    Rick Whitson Detroit Area Sponsor

    I live South of...
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    Does anyone have a picture of their bracket for putting a duel master cylinder on a single master cylinder Jeep? I would like to upgrade my 64 Jeep. Thanks. Rick
     
  2. Dec 4, 2018
    TIm E

    TIm E Sponsor Sponsor

    NW Arkansas
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    I might be able to do one better. Pretty sure I have the bracket from a 71. It uses the dual MC with the bale-type hold down for the lid. PM me if interested.
     
  3. Dec 4, 2018
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member Sponsor

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  4. Dec 4, 2018
    Bowbender

    Bowbender I'm workin' on it! Sponsor

    Northern Minn.
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    I made my mounting bracket.

    [​IMG] [​IMG]
     
  5. Dec 4, 2018
    Bowbender

    Bowbender I'm workin' on it! Sponsor

    Northern Minn.
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    Installed

    [​IMG]
     
  6. Dec 5, 2018
    Rick Whitson

    Rick Whitson Detroit Area Sponsor

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    Thanks Howard, Mike and Tim, wish I would have done this before I put my body back on my Jeep. My 10" brakes work OK, but I bought a set of 11" drums and backing plates complete, and want to upgrade to a duel master cylinder and 11" front and 10" rear brakes. Just collecting parts for now, Thanks again for all the help Guys, Rick
     
  7. Dec 5, 2018
    Mcruff

    Mcruff Earlycj5 Machinist Sponsor

    Albertville, AL
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    How are the reservoirs mounted on the firewall? Did you cut a hole in the gasket to MC?
     
  8. Dec 5, 2018
    Vanguard

    Vanguard Tracer Bullet PI Staff Member Sponsor

    Brighton, MI USA
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    I installed a dual MC using Herm's bracket. I ran into a number of issues and helped Herm source the line adapters.

    If I had to do it over again, I would go with Howard's design. It looks easier to install, appears to avoid pushrod issues and is better suited to a remote reservoir.
     
  9. Dec 5, 2018
    Bowbender

    Bowbender I'm workin' on it! Sponsor

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    I made a bracket that bolts to the upper firewall. Yes, I cut a (small) hole in the rubber "liner" of the lid. Put the fitting in the hole I drilled in the lid/cover,
    sealed it with RTV and sandwiched it in with a fender washer and a nut.

    [​IMG]
     
  10. Dec 5, 2018
    Mcruff

    Mcruff Earlycj5 Machinist Sponsor

    Albertville, AL
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    Looks good, thanks for the picture!
     
  11. Dec 31, 2018
    dsthomas350

    dsthomas350 New Member

    Winfield, IL
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    This is the bracket in my 69. I'll get a better shot of it when I get it out. I'm installing Herm's 11 inch drum and master cylinder kits. I will need to use the original since it also supports the clutch pedal.

    Meet Google Drive – One place for all your files
     
  12. Dec 31, 2018
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member Sponsor

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    Can you post the pic here? I'm morally opposed to any site that wants me to sign in to look a t a pic. ;)
     
    cookieman and Twin2 like this.
  13. Dec 31, 2018
    dsthomas350

    dsthomas350 New Member

    Winfield, IL
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    Try this one, it s should be open.

    20181231_101449[1].jpg
     
  14. Dec 31, 2018
    dsthomas350

    dsthomas350 New Member

    Winfield, IL
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  15. Dec 31, 2018
    Rick Whitson

    Rick Whitson Detroit Area Sponsor

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    I just got the bracket like the dirty one in pic. 2018123 105210, Will I need the duel MC, plunger rod too? I have a 66 frame with single MC on it wanting to up grade.
     
  16. Dec 31, 2018
    dsthomas350

    dsthomas350 New Member

    Winfield, IL
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    I'm going to guess yes, the new plunger rod with the new MC is about two inches longer and goes into the cylinder. I also noticed that the holes in the new bracket for the bolts are smaller than the originals. So, the original MC fits in the new bracket, but the new MC doesn't fit in the old bracket unless I make the holes larger, which is no big deal. Other than that I see no reason not to use the original bracket if it's in good shape, plus I don't have to cut the original bracket and drill four more holes in the frame.

    20181231_125126[1].jpg
    20181231_130510[1].jpg
    20181231_130748[1].jpg
     
  17. Dec 31, 2018
    Rick Whitson

    Rick Whitson Detroit Area Sponsor

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    By the way, Welcome from Michigan, Thanks for the pictures, that helps a lot. I am trying to get as much together as I can before I start, to make it a smooth upgrade, and my Jeep isn't down any longer than it has to be. After I get the duel MC done I want to go to 11" brakes on the front. I got a complete set from another Member. Thanks again, Rick
     

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