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Hot Rods Brake Master Cylinder Cap

Discussion in 'The Hokey Ass Message Board' started by BobRob72!, Oct 4, 2022.

  1. BobRob72!
    Joined: May 6, 2022
    Posts: 23

    BobRob72!

    I'm trying to replace a brake master cylinder cap but don't know what the master cylinder came off of. It measures 3 1/16" W. x 6" L. It is single bail and is rounded on one end and squared off on the other. Can anyone help me identify the vehicle this might belong to? The guy I got it from said maybe a '70 Mustang with disc brakes or a Ford pickup (not much help).
     
  2. squirrel
    Joined: Sep 23, 2004
    Posts: 60,040

    squirrel
    Member

    this is a 70 mustang. There are a whole bunch of pictures of them at sites like rockauto.com

    mc.jpg
     
  3. BobRob72!
    Joined: May 6, 2022
    Posts: 23

    BobRob72!

    That's exactly what mine looks like but I am looking for dimensions. Most are 2.75" x 5.75" but mine is bigger,
    3 1/16" x 6". Nobody lists dimensions on their listings and the guys at the auto parts stores can't tell me anything except to ask what make and model it is for.
     
    HarryT likes this.
  4. Johnny Gee
    Joined: Dec 3, 2009
    Posts: 14,430

    Johnny Gee
    Member
    from Downey, Ca

    Which end has the bigger reservoir? Could it be from a 67 GM product? 651894C3-7EB5-4C60-9A95-525D63DB52F0.png
     
    Last edited: Oct 4, 2022
  5. BobRob72!
    Joined: May 6, 2022
    Posts: 23

    BobRob72!

    The bigger reservoir is the end toward the clutch pedal (rounded end).
     
    Johnny Gee likes this.
  6. winr
    Joined: Jan 10, 2008
    Posts: 296

    winr
    Member
    from Texas

    Can you take a pic of it ??

    Also, do the brake lines come out towards the mill or towards the fender ??

    Last... is it mounted to a vehicle ??


    Ricky.
     
  7. BobRob72!
    Joined: May 6, 2022
    Posts: 23

    BobRob72!

    I meant to say toward the brake pedal.
     
  8. BobRob72!
    Joined: May 6, 2022
    Posts: 23

    BobRob72!

    It looks exactly like the picture posted by Squirrel above. Lines come out what would be the fender side if it was mounted on a firewall. It's on a 32 coupe so it's mounted the reverse of a normal location. And yes it is on the car.
     
  9. Mr48chev
    Joined: Dec 28, 2007
    Posts: 36,054

    Mr48chev
    ALLIANCE MEMBER

    Are you measuring the old cap or the top of the master cylinder?
     
  10. BobRob72!
    Joined: May 6, 2022
    Posts: 23

    BobRob72!

    Top of master cylinder.
     
  11. Mr48chev
    Joined: Dec 28, 2007
    Posts: 36,054

    Mr48chev
    ALLIANCE MEMBER

  12. Johnny Gee
    Joined: Dec 3, 2009
    Posts: 14,430

    Johnny Gee
    Member
    from Downey, Ca

    ^^^^^ Then does @BobRob72! master have a mounting flange like this? 03742332-798D-4733-AD3F-3ACDEA7E1295.png
     
  13. pprather
    Joined: Jan 10, 2007
    Posts: 9,018

    pprather
    Member

    The Ford single bale masters, there is a "small" cap and a "large" cap style.

    I'd suggest calling Pete & Jake's with your question.
     
    Last edited: Oct 4, 2022

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