At 09:07 AM 10/03/2007 -0800, Bob Freitas wrote:
> If the adjuster and barrel are both steel then they may be just forced
>together(you do not mention if the are NOS or used) . If the adjuster is
>alloy and the barrel is steel then electrolysis has taken place and they
>are corroded together ,in this case I would apply heat (remove rubber o
>ring) to the adjuster and then twist. Alloy should expand enough to be
>moved.
Just checking mine (~1981) with a magnet and the threaded barrel might be chromed brass and the nut with the O-ring chromed steel. Heating the caliper arm should free the barrel because brass has a somewhat lower coefficient of expansion than aluminum. However, brass has a higher coefficient of expansion than steel, so heating the nut won't work, but maybe freezing the nut and barrel might.
John Betmanis
Woodstock, Ontario
Canada