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Crown Master Cyl. J0945556 Specs

Discussion in 'Early CJ5 and CJ6 Tech' started by Mark Andrews, Jul 17, 2019.

  1. Mark Andrews

    Mark Andrews New Member

    Can anyone tell me the piston push rod free play from the maximum off position to when the initial pressure starts? I have talked with tech support at Crown but they do not have this info. What I was told was they send an original unit (presumably Wagner in this case) out (overseas) to be duplicated and they have no drawings or specifications sheets to refer to. This is the dual master cylinder for 10" drum brakes on 66-71 CJ5 & 6. Thank you.
     
    Mark Andrews, Jul 17, 2019
    #1
  2. Jw60

    Jw60 That guy 2024 Sponsor 2023 Sponsor 2022 Sponsor

    That doesn't surprise me one bit, it will be a crapshoot for a spec like that because it will depend too much on the person putting it together.
     
    Jw60, Jul 17, 2019
    #2
  3. Glenn

    Glenn Kinda grumpy old man Staff Member

    I imagine most people adjust it to have no noticeable pressure against it but no real free play either....that's what I do anyway.
     
    Glenn, Jul 17, 2019
    #3
    Jrobz23 likes this.
  4. Twin2

    Twin2 not him 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Crown Master Cyl. J0945556
    [​IMG]
    looks correct to me . my jeep the pedal only moves about a inch before you feel it
     
    Twin2, Jul 18, 2019
    #4
  5. Glenn

    Glenn Kinda grumpy old man Staff Member

    Hmmmmm. Is that a 2 piece rod setup? Or is there another way to adjust that portion?
     
    Glenn, Jul 18, 2019
    #5
  6. Twin2

    Twin2 not him 2024 Sponsor 2023 Sponsor 2022 Sponsor


    no adjustment
     
    Twin2, Jul 18, 2019
    #6
  7. Bowbender

    Bowbender I'm workin' on it!

    [​IMG]
    Just a side note, I made mine adjustable with a grade 8 bolt and a Heim joint.
     
    Bowbender, Jul 18, 2019
    #7
    txtoller and Glenn like this.