![]() ![]() Note that each track is independently driven by a steering clutch and brake - one for each - the type of clutch (wet or dry) depends on the SN. Also, one of the best things I did was to buy the original Operator's Instructions and Parts Book for this Cat. The key to your questions lies in the Serial Number (SN) of your Cat. I'm pretty happy with the (all original) pony motor and diesel engines as well as the operation. Still, it may be more economical to fix it rather than converting to direct electric, especially if the flywheel housing isn't already machined to take a starter- some were, some weren't.Ĭoincidentally, I purchased a Cat D69U (1955, 66 HP, cable blade, 12" wide tracks) about 6 months ago and have used it (north central MN) to push out some stumps and dig out a pond. Nothing wrong with a pony motor if it's in good shape, but I'm betting the one on the machine in question has seen better days. The dry clutch machines used rubber links between the flywheel and the clutch to transmit the power, and the last time I bought a set for my D7 about ten years ago they were getting harder to find and a bit pricey. The dry clutch machines aren't too bad- they worked many thousands of hours back in the day- but the oil clutch is a better setup. ![]() I put a turbo on mine, and it helped but it was really just fine without it. Here's an old thread on it, and if you go to my youtube channel there are some vids of it there pushing trees. I have a later model oil clutch D6 9U, and it's one of the toughest machines Cat ever built. Onward and upward, the saga continues, if nothing else I'm sure learning a LOT from you all, and I really appreciate it! I just REALLY need to get SOMETHING SOON, because each day is just putting me farther and farther behind schedule! It doesn't help that I'm disabled, because I wouldn't have to be so darn "picky", but that's the way it is, I just gotta live with it! I wish everyone a great day, and thank you all! I don't know, I'm just seeing a LOT of "red flags" with this specific D6-9U! It may wind up being a "moot" point anyway, as he doesn't seem to be in any hurry to get me the rest of the info, pics, and video, he said he would. I DO realize ANY "used" dozer could have potential problems, however, I am looking at some other tractors that I at least know a LOT more "history" about, such as what's been done to them, how many hours they have, etc., that would probably be much easier for me to operate, as well as having more things going for them, such as having a tilt blade (but not a 6 way), more weight and horsepower, NO pony motor to cuss at, etc. From what I've read here, he doesn't even seem to know how to operate it properly, since he says flat out it's a "pedal steer"! I have NO idea how the "hydraulic conversion" was done, or IF it was done properly, plus he said "it had sat for 30 YEARS, only being started once in a while"! On top of that, I'm not sure of the correct "terminology", and please correct me if I'm wrong, but I don't believe this dozer has the "pump up" or "automatic" track adjusters?!?!? Don't these older 9U's have like a "manual threaded type" track adjuster of some sort, that is kind of a pain in the arse? I guess what I'm getting at is, I don't want to get the dozer and then find out that it's going to need a lot of work, plus, I just read an older post that talked about a rather worrisome, and "famous" problem these older D6's had with busting, or breaking, the intermediate shafts, as well as problems with the steering clutches locking up, etc. He has "no idea" how many hours are on it, or what all has been done to it. Thanks for your input Animal (Nelson), I must admit I'm having some pretty hefty reservations, at least with this particular 9U, NOT because it isn't a great dozer, but due to the fact the owner doesn't seem to even know his own machine, which makes me wonder what kind of condition it's "really" in.
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