W900 Rear Mounted Loader v184.108.40.206
This is a W900 Kenworth Log Truck with a rear mounted Prentiss 2124 Knuckle Boom Log Loader.
This particular version was created by D3 Machinery.
Please take a moment to check out and like his Facebook page if you are into logging. He has also created a few other things there that you might find interesting.