$79 U650 Tractor v5 3D model by dragosburian. Available on CGTrader with 278837 polys and 370644 vertices. Check it out on CGHub.
BLEND (Blender, filesize: 15.5 MB), OBJ (OBJ, filesize: 13.1 MB), FBX (Autodesk FBX, filesize: 17.4 MB), DAE (Collada, filesize: 15.7 MB), STL (Stereolithography, filesize: 9.96 MB)