SYSTEM AND METHOD FOR REMOVABLE INSTALLATION OF SWING CIRCLE FOR LARGE CRANE

摘要

The superstructure for large material handling apparatus is removably mounted to a bed by means of a swing circle which includes a bearing having an outer race secured to the bottom of the superstructure and an inner race with a plurality of depending slotted tangs. The tangs are placed through slots in the bed of the apparatus, and wedges are forced into the slots of the tangs to secure the tangs beneath the lower surface of the bed. The wedges are then locked in place, and means are provided for bracing the tangs against the frame of the apparatus to prevent turning of the inner race during operation.