$129 Sany SY500H Large Excavator 3D model by Polygate. Available on CGTrader with 1368979 polys and 1410618 vertices. Check it out on CGHub.
OBJ (OBJ, filesize: 37.2 MB), FBX (Autodesk FBX, filesize: 720 MB), MAX (Autodesk 3ds Max, filesize: 158 MB), C4D (Cinema 4D, filesize: 36 MB), TEXTURES (Textures, filesize: 98 MB), PNG (PNG, filesize: 98 MB), MA (Autodesk Maya, filesize: 79 MB), BLEND (Blender, filesize: 106 MB)