A device to extract a support yoke from a reheat stop valve of a steam turbine is provided. The device includes a hydraulic cylinder for applying a pushing force to the support yoke, an attachment weldment for attaching the hydraulic cylinder to the reheat stop valve casing, and a conical cylinder coupled to the hydraulic cylinder and configured to evenly impart the pushing force to the support yoke from within the reheat stop valve in order to separate the reheat stop valve from the support yoke. A method to extract a support yoke from a reheat stop valve of a steam turbine is also provided.