Posted by Billy NY on February 12, 2018 at 10:11:21 from (74.70.66.240):
In Reply to: Pictures of the D6's posted by mschwartz on February 11, 2018 at 19:57:31:
Ag work was the original purpose for crawlers or the most common application.
Looks like all are wide gauge with the widest track pads.
The older 4R, would have originally been the 3 cylinder engine, D6600 ? I think. So did the 2H and 5R.
No blade trunnions on these, track idlers are smaller and allow easier turning, best suited for drawbar work.
The 9U& 8U platform, wide gauge/narrow gauge, was a best seller for Caterpillar. I think they sold more 9U's than any other tractor, though the 3T, 4T D7's went over 50,000 tractors. I'm wondering if any of yours have a dry clutch, somewhere in the first few years oil bath clutches were standard, and they did offer a kit to convert dry clutch tractors over to oil bath. Direct drive, oil bath clutch tractors were a trade mark bullet proof design that carried well into the D6D series, which is still desirable today.
Over on ACMOC, there used to be posts of similar or the same models of tractors working in this area. You could get direct drive/oil bath & starting engines into the 70's, not sure when the direct drive and oil bath was phased out.
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