This part consist of only 2 Cylinder Vertical Marine Type Steam Engine. So the parts are assembled. Thank you for your interest.
STL (Stereolithography, filesize: 4.1 MB), OBJ (OBJ, filesize: 8.42 MB), STP (STEP, filesize: 1.46 MB), FBX (Autodesk FBX, filesize: 2.12 MB)