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Banjo rear Pinion Pre-load

Discussion in 'The Hokey Ass Message Board' started by zgears, Mar 28, 2013.

  1. zgears
    Joined: Nov 29, 2003
    Posts: 1,560

    zgears
    Member

  2. Bruce Lancaster
    Joined: Oct 9, 2001
    Posts: 21,682

    Bruce Lancaster
    Member Emeritus

    Pinion bearing torque: Model A-B type rear, 1928-1932, 35—47 inch pounds, later spec for A-B 15-20, Model 18 type 1932-1934, 20-25 inch pounds, 12-16 later rear 1935-1948 spec!
    Note that A-B rear was changed to a lower spec than first given.
    For Ford overhaul info...you want to look in service bulletins 1928, 1933, and 1938.
     
  3. zgears
    Joined: Nov 29, 2003
    Posts: 1,560

    zgears
    Member

    Thanks, Bruce.
     
  4. zgears
    Joined: Nov 29, 2003
    Posts: 1,560

    zgears
    Member

    What about the lock nut, same torque setting? Mine is a 37'.
     

  5. Bruce Lancaster
    Joined: Oct 9, 2001
    Posts: 21,682

    Bruce Lancaster
    Member Emeritus

    The spec given is the tiny force needed to rotate the pinion with some preload on the bearings, and has nothing to do with torque on the pair of lock nuts...I don't believe there was ever a Ford sourced spec on that, but those need to be tight so nothing backs off. You need two big wrenches...be very careful to hold location on the adjusted nut, tighten down the lock until your eyes bug out exactly 3/8", bend the tabs on the washer for extra security.
     
  6. hotcoupe
    Joined: Oct 3, 2007
    Posts: 522

    hotcoupe
    Member

    just a heads up, check your pinion bearing pre-load again AFTER you apply torque to the lock nut. you will move the first nut on the pinion shaft ever so slightly increasing the pre-load on the bearings. just something you should be aware of.
    tom
     
  7. Bruce Lancaster
    Joined: Oct 9, 2001
    Posts: 21,682

    Bruce Lancaster
    Member Emeritus

    Also...assemble things out of shop manual sequence. Assemble rear without pinion to check preload on carrier without interference. At final, you might have to move gasket thickness but total thickness will be the same.
    Assemble pinion into bare banjo after this, set its preload, then everything can go together to check backlash.
     

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