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Hello everyone from a new member. My screen name is derived from a FLU419 SEE that is currently my most effective earth mover. It is essentially a Case 580 backhoe and a front loader mounted on a roadworthy Mercedes Unimog chassis that can travel on pavement at about 45mph if necessary. In addition to the front and rear implements it has a hydraulic tool circuit (the hose reel between hydraulic tank and cooler) that can power a chainsaw, jack hammer, rock drill, impact wrench, sump pump, pole pruner, and many other Stanley hydraulic tools. The FLU419 is great for digging holes, moving dirt from one place to another, clearing trees, etc. I built a logging winch that goes in place of the front loader for bigger trees and at some point I will built a three point hitch for brush hogging and plowing. The Unimog is by design a very versatile machine . ("Unimog" is the German portmanteau for "Universelles Motorgerät" = universal motorized device). However it is not the right tool for establishing or improving roads and driveways since the loader bucket cannot change the side slope like a 6 way blade. My Case 1840 skid steer with regular bucket also suffers from the same limitation. So far, I have gotten by with using the backhoe to change the grade and then back dragging with the bucket but this is a tedious process and the 16,000 lbs of the FLU419 resting on 4 tires will leave pretty serious ruts in disturbed soil. (If it were not for the high ground pressure, I would built a 6 way blade for the Unimog.) After getting some $$$ quotes for putting in a new driveway at our property, I decided to look for a dozer that I can afford to keep sitting around for my own needs. I know that many people suggest to just pay a contractor and not get into a machinery project but buying both the skid loader and the FLU419 has convinced my otherwise. Neither machine was running and usable when I got it and today I do not know how my life could continue without either one. I also thought that I never would need a lathe, mill, welder, press, etc. but now there is hardly a week where one of these tools does not save the day. I have been lurking on this forum after running across a TD9 with a Bucyrus Erie blade. When I first looked at the machine and saw injectors AND spark plugs on the same block (not a pony) I was dumbfounded but a few minutes on this site resolved the mystery. A closer inspection revealed that the tracks and sprockets are pretty worn and the engine is stuck even though the machine was stored under a roof. I was ready to walk away from this project but when I mentioned my frustration to a friend, he alerted me to a neighbor having another TD9 sitting around that needs the bearings of the secondary transmission shaft replaced. This machine supposedly has decent tracks and the engine is supposed to be free. I will try to confirm this in the next few days. Now, I am tempted to get both machines, assuming that both owners would sell for scrap value, and cobble them together to one working dozer plus parts. If I go that route I plan to turn over the engine of the TD9 with the failed gearbox, maybe even try to get the engine running, and then pull it out of the dozer - with the help of the FLU419. That should create plenty of space to work on the TD9 gearbox. As far as I could gather from this site, the gearbox could be repaired with the engine left in place after removing the clutch but there is a chance that the gearbox is beyond repair in which case the engine will go into the TD9 with the stuck engine. Of course there will be stuck steering clutches and other surprises but between the two machines I should have enough chances to get a running machine together. Any suggestions on what to look for and consider before getting into this madness?