Joined: Feb 2012
Posts: 19,361
Likes: 5,500
From: Rochester, NY
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
If simple penetrating oil and pliers don't do the job the OP might have to file away the brass sleeve along one lengthwise point and then peal the sleeve away. I've seen the steel post rust so badly that the brake arm (and that sleeve being tightly contained in the arm) become too tight to slide off. If the steel boss unthreads from the base one can use a M6 bolt and nut for a handle. Thread the nut on the bolt and the bolt in the open end of the boss and now this handle can be held by hand or in a bench vise. Andy
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AndrewRStewart