Abstract: The disclosure concerns a procedure for replacing a worn bolster ring on a freight car truck bolster which utilizes a motorized circle cutting and welding machine which rests upon the bolster and is centered by supporting structure positioned by locating pins which engage two pairs of mounting holes for the side bearing cages. The worn ring is cut from the bolster by a cutting torch driven around the circumference of the ring by the motorized machine. Then, the replacement ring is placed on the cut bolster surface, centered with respect to the axis of the motorized machine and tack welded, and finally welded to the bolster by a welding head which traverses the inner and outer peripheral surfaces of the ring under the control of the motorized machine.

Abstract: The disclosure concerns a procedure for replacing a worn bolster ring on a freight car truck bolster which utilizes a motorized circle cutting and welding machine which rests upon the bolster and is centered by supporting structure positioned by locating pins which engage two pairs of mounting holes for the side bearing cages. The worn ring is cut from the bolster by a cutting torch driven around the circumference of the ring by the motorized machine. Then, the replacement ring is placed on the cut bolster surface, centered with respect to the axis of the motorized machine and tack welded, and finally welded to the bolster by a welding head which traverses the inner and outer peripheral surfaces of the ring under the control of the motorized machine.