Abstract: A base for supporting a lift system in a nacelle of a wind turbine involves a pillow block mount mountable on the pillow block through studs. A longitudinal beam pivotally connected to the pillow block mount is pivotable about a horizontally oriented axis transverse to the longitudinal axis of the longitudinal beam. A beam support is connected to the longitudinal beam to support the longitudinal beam on a main bearing of the wind turbine proximate the distal end of the longitudinal beam. A jack is situated proximate the distal end of the longitudinal beam to engage the longitudinal beam and a bedplate of the nacelle to raise and lower the distal end of the longitudinal beam to pivot the longitudinal beam about the horizontally oriented axis. The base permits the lift system to lift the main bearing, the rotor or the gearbox with little or no reconfiguration of the base.