Good You took the bait. You posited what was the Best Dozer Made? You did not ask, who still had parts available? Who was still in business? How fast I can get the parts? Those are substantially different questions? You did not state or ask today. Your qestion is so vauge that any discourse on this subject matter is or can be factually correct. If you ask for lasting long. You just shot yourself in the foot. The HD11 is much older than your CAT. Beats it by 15 years or more and it is still running. My HD9 beats that by almost 22 years. Mine came out of lime stone Rock quarry. I now have a full new UC under it and it is almost ready to go. I know in Idaho where there is an HD9 still in active use in a quarry. CATS could not hold up. My father-in-laws 1947 TD9 beats that by 29 years and we still use it. I do not see a whole lot of CATs that age running around and in production use. So I guess your CAT's longivity is not that high. A good freind of mine has run CAT for 30 years and almost every CAT made and a wide variety of AC and IH equipment over those thirty years. you know what, he owns a IH TD9. He would not trade it for any CAT of that era. Many guys would say CAT is over rated. Remember this board is for a wide variety of machines and individuals having crawlers. This is not ACMOC. No fun to rant and rave in an all CAT world. CAT is not so hot on parts availablity either. Take the 933F and try to find a truck frame or the pinion shaft--which was a major failure point on those machines. They do not exist..... I almost made a mistake of owning that machine. I checked parts aviailablity. Just as bad as my AC except that roller shells could still be bought. I compared close to same generation of machine. If we compare tractor to tractor when it was built, the AC had many innovations. You forgot to mention the fact that AC was the first to produce permanenatly sealed rollers ect. AC was the first with Unit construction which made it very simple to work on the drive train with out full disassembly. They were the first with fully lift out on the steering brakes. AC was the first to succesfully produce a production machine with over 500HP. For a long time they produced the world's largest dozer. Now I have never had a nut cross threaded to date. I had a shaft that was damaged and went to a machine shop and had it fixed for a fraction of the price that it would cost for CAT. When it happens just take that to a machine shop and have them fix it. Try that with CAT, Not. You are comparing a 1976 tractor with one made in between 1955 to 1960. If it is a straight HD11, you have a DD drive trany and the 76 will have a TC, with a mulitplier of 2-3x on the torque. The fact that the HD11 is junk is as much a function of maintenace and use/abuse of the machine and the fact that the technology is so radically different. A little TD6 will push an DD HD11 all over the place if the grousers are worn to the nub, the rails are worn and the sprocket is bad. I can take an FD51 or HD41 and tow a Cat D8 all day long and the the only thing it could do is spin it tracks. They had so much torque they were know for shattering their final drive shaft. Got a little too much there. The HD31 with a few less horse did not have that problem. Your qestion begs other questions as to how to arrive at the best dozer. Well as stated earlier. Compare like machines within the same era and the results will be different. AC is gone, so is IH, Dresser. They lost not because they were bad machines, the farm economy ulimately sunk the parent companies and in some cases poor management. Is FA a good machine now, I would question that, but you know they have taken a lot of market share from CAT and so has Komatsu--IH. Interesting enough CAT is now making or starting down the the same misadventures that IH and AC made. They are now wanting to produce farm related equipment and combines. I look forward to more postitive discourse on this subject matter.
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