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‘67 Dual Master Cylinder Install Questions

Discussion in 'Early CJ5 and CJ6 Tech' started by Buildflycrash, Jul 19, 2022.

  1. Jul 19, 2022
    Buildflycrash

    Buildflycrash More or Less in Line. 2024 Sponsor 2022 Sponsor

    Gulf Breeze FL...
    Joined:
    Jun 5, 2007
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    3,674
    Couple of questions/problems I’m having with my new MC.

    1. I need to extend the pushrod a little to get full travel. I’ve twisted and pulled but it doesn’t seem to want to extend or come out. Any tricks for this?

    [​IMG]
    That picture is kind of upside down.
    2 The nut/bolt that holds the pedal shaft to the pedal lever hits the Ross box.

    See the yellow circle - nut contacts the box - red. What is wrong here?

    [​IMG]
     
  2. Jul 19, 2022
    oldtime

    oldtime oldtime

    St. Charles,...
    Joined:
    Aug 14, 2006
    Messages:
    3,507
    Not supposed to be a hex head. Jeep used a countersunk bolt in that location.
     
  3. Jul 19, 2022
    Buildflycrash

    Buildflycrash More or Less in Line. 2024 Sponsor 2022 Sponsor

    Gulf Breeze FL...
    Joined:
    Jun 5, 2007
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    3,674
    That would definitely help!!

    I ended up pulling the brake lever arm out a couple times and tweaking it on my little shop press. It’s much better but still clunks around a little when pushed. I’ll look at the counter sink deal on some spare pedals I have.

    Extending the pushrod looks like a no go?
    I’ll be able to tell more as I get then bled well.
     
  4. Jul 20, 2022
    Uncle Vin

    Uncle Vin Member 2022 Sponsor

    Long Island, New...
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    Sep 29, 2008
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    Please explain. I know nothing about this issue.
     
  5. Jul 20, 2022
    oldtime

    oldtime oldtime

    St. Charles,...
    Joined:
    Aug 14, 2006
    Messages:
    3,507
    Hi Vin,

    Group 11-03 Clutch Pedal

    This change occurs when the dual master cylinder was implemented by law.
    The pedal (lever) went from the old military part # A405 to 992756.
    The similar looking superceded lever was reshaped
    for proper clearance and refitted to accept the split bore push rod eye.
    The pedal is countersunk where the flat head screw enters.
    The clutch pedal was not changed at this time.
    [​IMG]
     
    Buildflycrash, Jw60 and Fireball like this.
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