Old 02-26-14, 05:07 PM
  #2  
Al1943
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Join Date: Feb 2005
Location: Oklahoma
Posts: 9,438

Bikes: Trek 5500, Colnago C-50

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It looks like you are missing a hinge pin. You might be able to substitute a small machine screw with Nyloc nut or a nut with locktite (superglue).
Front derailleurs are relatively cheap. Yours is a "braze-on" type.
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