The John Deere 859M Tracked Feller Buncher is built for the way you work. Large-displacement 9.0L engine delivers the power you need to get the job done quickly and efficiently. Maximize productivity with the Rapid Cycle System, which combines automated felling-head arm cycling with simple boom control so you can perform multiple tasks without power drain. Throw everything you've got at it. This feller buncher packs a tremendous punch.