Abstract: A turbine casing alignment tool includes a first section securable to an outer shell of a turbine casing. A second section of the alignment tool is securable to an inner shell of the turbine casing. The alignment tool facilitates adjustment of at least one of the inner shell and the outer shell relative to the other in multiple degrees of freedom to control both co-linearity and concentricity of the outer shell and the inner shell.

Abstract: A turbine includes upper and lower inner shell sections mounting the nozzles and shrouds and which inner shell is supported by pins secured to a surrounding outer shell. To disassemble the turbine for access to the inner shell sections and rotor, an alignment fixture is secured to the lower outer shell section and has pins engaging the inner shell section. To disassemble the turbine, the inner shell weight is transferred to the lower outer shell section via the alignment fixture and cradle pins. Roller assemblies are inserted through access openings vacated by support pins to permit rotation of the lower inner shell section out of and into the lower outer shell section during disassembly and assembly. The alignment fixture includes adjusting rods for adjusting the inner shell axially, vertically, laterally and about a lateral axis. A roller over-cage is provided to rotate the inner shell and a dummy shell to facilitate assembly and disassembly in the field.