.RC.
Senior Member
If there has been a peak in excellence in Caterpillar of longevity , cost , simplicity it must surly have been with the D4D , D6D ,D7G , D8K and the D9H . I had not forgotten the D5 , just don't see it measured up .
You still needed to find someone with the expensive hydraulic pullers to touch the final drives on those models. That design was out of date when Cat was still plugging along with them. International had planetary final drives and a track frame pivot shaft not connected to the final drives out for decades before Caterpillar borrowed that idea.