Turbine Doc
Just Another Diesel Guy
If we are dealing with a rounded out pocket (need a picture if you can to show us what we are dealing with); get a grade 8 bolt & custom grind the head to fit the pocket, double nut the threaded portion and use a breaker bar/socket to drive out the "tool" you just fabricated, use plenty of PB blaster or other good penetrant on the fitting in the brake housing