Pre-41 Front Brake Shackle

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  • 40 Nuck
    Senior Member
    • Mar 2008
    • 221

    #1

    Pre-41 Front Brake Shackle

    Have a shackle XF-834, and am not sure of the casting # for various shackles. I have researched Palmer on what I thought was an original early Big Twin shackle, but some things aren't consistent with Palmer. It's 6" long, but looks closer to 33/64" wide at the blade. also, it has two grease fittings. Maybe wear and someone adding a grease fitting explain it, but just wanted to know if anyone can share definitive info based on the casting number? Thanks, Vic.
    Vic Ephrem
    AMCA #2590
  • knuckleheadtim
    Senior Member
    • Jan 2008
    • 141

    #2
    This one is about 6-1/8" center-to-center. Does your forging appear to have been plated and/or stripped?
    Attached Files

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    • 40 Nuck
      Senior Member
      • Mar 2008
      • 221

      #3
      Tim, That's it ... it may be a hair over 6" center to center. Can you tell me what it is? Big Twin 1940, I hope? It looks like it's older parkerized, and I don't think it's been stripped or plated.

      Thanks,
      Vic
      Last edited by 40 Nuck; 05-16-2008, 11:55 PM.
      Vic Ephrem
      AMCA #2590

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      • knuckleheadtim
        Senior Member
        • Jan 2008
        • 141

        #4
        I believe it's a '36-38 because of the two grease fittings on the sides. In '40, the rear fitting was moved to the pivot stud.

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        • flthead
          Senior Member
          • Dec 2003
          • 412

          #5
          no boss on grease fitting area on 37

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          • 40 Nuck
            Senior Member
            • Mar 2008
            • 221

            #6
            1940 Big Twin Shackle Casting #

            Can someone with a correct 1940 Big Twin front brake shackle tell me what the casting number is on the shackle? Thank you.
            Vic Ephrem
            AMCA #2590

            Comment

            • handshifters
              New Member
              • Sep 2007
              • 17

              #7
              Originally posted by 40 Nuck View Post
              Can someone with a correct 1940 Big Twin front brake shackle tell me what the casting number is on the shackle? Thank you.
              mine has XF 834F

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