Thought this video I just received in a subscription email was worth sharing, tier 4 D11T
http://youtu.be/Epi77sDF5ac
http://youtu.be/Epi77sDF5ac
In the mining that I've been part of, if you could bury the ripper to the frame, you get longer shanks.
IMO, not being experienced in ripping, those conditions in the You Tube, or on machine ANYWHERE the size of the 11T, I would probably lower the 'dozer until the tips of the corner bits were just clearing the ground to more nearly balance the machine when ripping-that's an extreme draft load and the front of the machine and the front of the tracks do appear to be up. Any comments from those with the experience?