Patent Number: 053612850
Section: claims

1. A method of repairing cracks in a nozzle in which a sleeve is fixedly disposed, comprising the steps of: inserting a sleeve cutting tool into the sleeve;  activating support means which engages the inner wall of said sleeve and which maintains the sleeve cutting tool in a predetermined position within said sleeve;  cutting through said sleeve using said sleeve cutting tool in a manner which allows a portion of said sleeve to be removed;  removing the portion of said sleeve;  inserting a crack removing tool into the portion of said nozzle wherein said sleeve has been removed;  activating support means on said crack removing tool to support said crack removing tool in said nozzle;  using a crack detecting sensor to locate the position of a crack in said nozzle;  moving said crack detecting sensor away from the location at which the crack is detected and moving a crack removal head into position opposite the location whereat the crack was detected; and  removing portion of the inner wall of said nozzle using said crack removal head.  returning the crack detection sensor to the location at which the crack was detected and determining if the crack is still present;  moving said crack detecting sensor away from the location at which the crack is detected and moving a crack removal head into position opposite the location whereat the crack was detected in the event that the crack is detected as still being present; and  removing a further portion of the inner wall of said nozzle using said crack removal head. 2. A method as set forth in claim 1, further comprising the step of operating said crack removal head for a predetermined period of time. 3. A method as set forth in claim 1, further comprising the steps of: