Resurfacing discharge ring of hydraulic turbine with runner in place

A method for resurfacing a discharge ring of a hydraulic turbine, the method comprising:

• mounting adjustable fixtures to runner blades of a runner of the hydraulic turbine while the runner is in place on the hydraulic turbine, the adjustable fixtures being configured to accommodate adjustable tool holders, the adjustable tool holders being configured to attach tools for performing resurfacing operations on the discharge ring of the hydraulic turbine, wherein each adjustable fixture is mounted to a different runner blade at a different predetermined vertical position with respect to a surface of the discharge ring;
• installing a discharge ring profile template to each adjustable fixture at a predetermined position with respect to the surface of the discharge ring, wherein the discharge ring profile template indicates centerlines and centerline angles for positioning the tools to perform operations to achieve a specified profile;
• installing to a portion of a turbine frame one or more drive units configured to cause the runner of the hydraulic turbine to rotate, the one or more drive units being configured to provide a rotational force to a brake ring attached to a turbine shaft of the hydraulic turbine;
• and
• controlling cutting equipment attached to each adjustable fixture to concurrently remove material from the discharge ring as the turbine runner rotates at a specified speed.