A support assembly for servicing a stator frame of a power generator includes a plurality of rails and a trolley. The rails are supported on frame rings of a main housing of the stator frame. The rails have upper surfaces that provide temporary support for lower support surfaces of second laminations of a second stator core once the second laminations are inserted into desired axial positions within the main housing. The trolley is provided for axial movement on the upper surfaces of the rails for inserting the second laminations into the main housing. The trolley includes a lamination-engaging portion including a lamination support surface for supporting upper support surfaces of the second laminations and a plurality of rail wheels provided for axial movement of the trolley within the main housing on the upper surfaces of the rails.