$52 Hydraulic Hammer with Powerpack and Compressor 3D model by mohim8k. Available on CGTrader with 436246 polys and 260491 vertices. Check it out on CGHub.
MAX (Autodesk 3ds Max, filesize: 28.5 MB), OBJ (OBJ, filesize: 43.3 MB), FBX (Autodesk FBX, filesize: 14.5 MB), TEXTURES (Textures, filesize: 414 KB)