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brake shoes

Discussion in 'The Hokey Ass Message Board' started by fordvic54, Jan 16, 2011.

  1. fordvic54
    Joined: Nov 9, 2010
    Posts: 3

    fordvic54
    Member

    working on our 54 ford victoria...installing brake shoes on the rear. The new shoes have linings that are different in length..one longer than the other. Anyone know wnhich is primary and secondary? primary faces front end.
    The linings on the original shoes are both the same length.

    Thanks...
     
  2. cosmo
    Joined: Mar 8, 2001
    Posts: 2,742

    cosmo
    Member

    Shorter linings are primary.

    Cosmo
     
  3. woodienut
    Joined: Feb 17, 2009
    Posts: 349

    woodienut
    Member
    from So.Cal.

    Not sure what a '54 has but my guess is they are "self energizing" and the the front is the longer shoe. Posting some pic's will help.
    Welcome to the HAMB
     
  4. woodienut
    Joined: Feb 17, 2009
    Posts: 349

    woodienut
    Member
    from So.Cal.

    Cosmo your right, my bad
     
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  5. V8 Bob
    Joined: Feb 6, 2007
    Posts: 1,409

    V8 Bob
    ALLIANCE MEMBER

    All drum brakes are self energizing to a point, but the Bendix brakes Ford starting using in '49 for cars are Duo-Servo, and this design always has the shorter or primary shoe forward, just the oposite of the pre-'49 Lockheed non-servo design. Shop manuals show the brakes in detail, although sometimes the shoe length difference can be hard to see.
     
  6. Hemi325
    Joined: Aug 15, 2006
    Posts: 228

    Hemi325
    Member
    from Chicago

    Cosmo's got it right. The short shoe is the primary, and it mounts forward. The secondary shoe has longer lining as it does most of the work, somewhere between 60 and 70%, the shop manuals say. They also say you should install the primary spring to the anchor first, and then the secondary. I've never heard the reason for that. Anybody know why?
     
  7. V8 Bob
    Joined: Feb 6, 2007
    Posts: 1,409

    V8 Bob
    ALLIANCE MEMBER

    There can sometimes be a clearance issue with the return springs and wheel cylinder. This "rule" changed throughout the years on some 9, 10 and 11" brakes, and whether they were auto adjusting or not. If the return springs are the same, it should not make any difference, but if they are different, it can. Generally, install the primary first and check the clearance to the cylinder.
     

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