BILL - IH Marketing way back in the mid-1940's targeted CAT as the construction equip. company to beat... Look at the spec's on the TD-24,
http://www.tractordata.com/farm-tractors/003/3/2/3322-international-harvester-td-24.html
1090 CID in-line 6 cyl "start oon gas/run on diesel" engine, up to 168 drawbar HP and over 41,000# of drawbar pull or push. And IH was working on even bigger crawlers, TD-25 & TD-30 when they decided they better let CAT have the dozer market. IH's big problem was that in twelve years they only built 7500 TD-24's... and in most MONTHS... They built that many ag tractors at FARMALL. IH needed VOLUME production to make money.
As Tom H. would probably agree, IH dozers had "Issues", but back in their day they were a decent machine. There's some video's on U-tube of IH dozers clearing right-of-way for a highway thru jungle in South America, TD-24's driving into and over trees 3-4 feet in diameter. They didn't even hesitate, just drove into them and down they went. Then they pushed them into a pile and burned them.
Until the 1960's, the largest ag tractors used the same size engines as the T/TD-9's, but IH also made TD14's, TD-18's, and then the 24's. If IH had spent that R&D money used on the crawlers on bigger ag tractors with more features sooner like more trsansmission speeds like the crawlers had, and a more durable power-shift like the crawlers had instead of the Torque-Amplifier used in the ag tractors, IH would probably still be around.
When IH decided to throw themselves into a market and gave the project enough engineering talent, they typically came out with a good machine, if not a revolutionary machine. Back in the late 1950's and early i960's several of our neighbor's had new IH pickups, and all the trucking co's had at least a few IH trucks if not mostly or ALL IH trucks. If I'd started hauling ready-mix at the ripe old age of eleven instead of 21, back in 1965, I'd have driven an IH gas-engine powered mixer truck. The IH's were all replaced with White's in 1966, several of which I was still driving in 1975.
If you watched ANY of the episodes of Ice Road Truckers this past season, they had an episode with "King of Obsolete" skidding across frozen lakes with dozers and sleds... most of his crawlers are IH. K-o-O used to post frequently years ago on the RPM forum construction equipment pages.