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512BBi emergency window handle operation

Discussion in 'Boxers/TR/M' started by rovexienus, Jan 13, 2021.

  1. rovexienus

    rovexienus Formula Junior
    Silver Subscribed

    Jun 10, 2010
    509
    Sainte Colombe, France (near Lyon)
    Full Name:
    Jean-Michel Savary
    I tried to operate the emergency window handle on my 512BBi. The mechanism appears to be stuck for both doors, I obviously did not try to force the handle. The windows are operating normally using the electric switches.

    Is there a special procedure I am not applying for this operation?
     
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  3. Rifledriver

    Rifledriver Two Time F1 World Champ

    Apr 29, 2004
    27,083
    Austin TX
    Full Name:
    Brian Crall
    You need to be sure the handle is pushed all the way in and it needs to be turned uncomfortably hard.
     
  4. pshoejberg

    pshoejberg Formula 3
    Silver Subscribed

    Dec 22, 2007
    1,388
    Denmark
    Full Name:
    Peter H
    I had same issue with my BBi and didn't dare to apply too much torque.....Then I started thinking if I ever will need this function. Have anyone ever operated their window(s) with the emergency crank?

    Best, Peter
     
  5. Rifledriver

    Rifledriver Two Time F1 World Champ

    Apr 29, 2004
    27,083
    Austin TX
    Full Name:
    Brian Crall
    Yes. Many times.
     
  6. rovexienus

    rovexienus Formula Junior
    Silver Subscribed

    Jun 10, 2010
    509
    Sainte Colombe, France (near Lyon)
    Full Name:
    Jean-Michel Savary
    Thanks to all for your inputs, next time I visit the car, I will try again.
     
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  8. Ludwig

    Ludwig Formula Junior
    Silver Subscribed

    Mar 27, 2006
    306
    Redmond WA
    Full Name:
    Ludwig Allegra
    I ran into the same observation after completely rebuilding the motors and re-cabling. I really saw no reason to stress it and didn't try very hard.
     
  9. 2dinos

    2dinos Formula 3

    Jan 13, 2007
    2,497
    Going from memory:

    The handle insertion acts on steel balls which act like a clutch throw-out mechanism to disengage the driven gear from the pulley for the cable. This requires uncomfortable force to push in the emergency crank handle. Then after inserted, the cranking of the emergency handle requires slightly less, but only slightly less uncomfortable force to turn imho.

    Doesn't help knowing that those parts are nylon, and breaking them makes dollar signs dance :oops:.
     
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