Abstract: A self-propelled core-cutting apparatus is used to cut circular slots in pavement extending about manhole castings and the like to permit castings and surrounding cores of pavement to be removed quickly and easily for such purposes as elevating the level of manhole castings to align with new pavement. The apparatus has a transport carriage to which are connected 1) a large diameter, generally cylindrical core-cutting bit, 2) power-operated support and drive systems mounting the bit for vertical and rotary movement relative to the carriage along and about a vertically extending center axis, and 3) a power-operated stabilization system that makes use of the weight of the apparatus in maintaining desired positioning of the apparatus during cutting operations.