Yes I have all the toys to push - pull a rim and top pinion on a D9G,the sprocket on a 9G was pressed on with a target of 60 to 65 ton so a 100 ton CAT Service Press cylinder should be fine for this task, the case with sprocket still set can be removed in 1 lump but you need to remove the oil pump first, the weight of it is a fare bit so you need to make a plate that takes up the now removed oil pump bolts with a lift eye on it, you then bolt in a lift eye on the opposite side of the case and fix chains or straps to also hook up the sprocket to lift with a dog leg frame, i have a bit of tube that would fit over the dead shaft and into the hub that guides things and protects the threads, the early dead shafts had big voids in the oil feed section that would hold a sack of metal sparkle in meaning you had to pull out the shaft to clean up, the later shafts did not have these voids so only needed rodding and flushing through to clean, the oil pipe work, one way valve and filter case will all need cleaning well. tctractors p.s. I did see a video of some Chaps that dragged a D8 or D9 some way and pushed it up on to a Low Bed then carted it miles and pulled it to bits, I would have fixed it where it stood without any messing about, we all do things our own way but why make things more trouble???? Best of Luck and do it by yourself, like I do then only an idiot can get hurt, don't follow that video on anything as they made it look hard, split the track on the rim end and drive the tractor forward to drop off the track completely, always remove the complete blade if fitted, and always join up the track at the sprocket end pulling the track back over with something with an engine is handy.