All of the bigger (275+) dozers we're currently running have completely caved in belly pans. Ground clearance is a problem for Komatsu's as well. It translates into a lot more time spent repairing the Komatsu than the Cat. While the exact same fix on a Komatsu requires removing the floor of the cab, unscrewing a few things to get them out of the way, and then you can access the wires. For example, a simple wiring fix on a Cat may take 30-45 minutes. Numerous mechanics have expressed a preference for working on Cat dozers in contrast to Komatsu. While most of Komatsu's I've been in are in sorry shape around 5,000 hours. I personally feel that a Cat dozer should be traded in after 8,000 hours in the rock they work in here in Utah. While that may be the extreme, overall Cat's spend more time working than Komatsu's. With 8,500 hours, the machine is beat to death. Since May we've moved more than 3 million yards of material, and the 375 sat out July thru early September when we really needed it (hydraulic pumps, steering, numerous engine and track problems, etc). For example, the outfit I work for has a Komatsu 375 with just over 8500 frame hours, and it's on it's third engine. Dowtime on Komatsu dozers always seems to be higher than Cat's. It seems to me that the little things are what really separate the two machines. This may also be why they seem easier to grade in. It's not something you notice too much while pushing, but when backing up long cuts or tracking from one place to another, the Komatsu feels better. The Komatsu dozers definitely ride smoother due to the K-Bogie Undercarriage system. And the wider blade allows for one or two less passes to get your sub grade finished.
Overall, Komatsu's seem (to me) to be easier to grade in. When roughing in roads to within a few tenths I prefer the Komatsu. But when the two are next to each other (with equally experienced operators) the Cat will slowly stock more material than the Komatsu. Whereas in the Komatsu, more material is lost out the sides of your slot. With the taller, narrower blade of the D11, in a slot a few feet deep, more material is rolled directly over itself and back in front of the machine. I also prefer the D11's blade for hogging large amounts of material. For ripping, I like the way the Komatsu ripper feels to me, it seems to curl a little further which I feel works better, but the D11 makes up for it with the additional power. The D11 feels more powerful to me than the 475. I think the Cat wins, but not by a large margin. Altogether I have thousands of hours in Komatsu as well as Cat dozers and have formed a few opinions.įrom a standpoint of simply performance of the machine. Of course both of the foregoing numbers include intermediate CPT Rebuilds.I've spent around 3,000 hours in three different D11's (two R's and and N). Even our 994's we are forecasting a 90,000 hour total life, and I hope to get 100+. Our haul trucks (789) are planned for 100,000 hours and will likely go more than that, I'd say 120k. That's 6k hours/1 year for the complete machine and 12k hours/2 years for Power Train components.
#575 komatsu dozer vs d11 serial number#
In essence it's a CPT Rebuild on steroids and the machine is given a new Serial Number afterwards and the complete machine comes with an original factory warranty. To digress, there is one stage above a CPT Rebuild, that is a Cat Certified Rebuild (CCR). The job is guaranteed and in our case the main components all carry a 12 month warranty, the rest of the machine 6 months. Right down to the frame and back planned for 24 working days IIRC and brought in under target. Somewhere here I posted photos showing the job on a D10T. Our target (very much Mine Ops efficiency dependent) is 7,000/year.Ī Certified Power Train Rebuild is done by the Cat dealer. Our machines run 24/7, so 6000 hours/year as an absolute minimum.
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