Only thing I know is from what some of the older guys who were around at that time tell me is the 4010 was unimpressive off the drawbar compared to a 830 which is a big deal in wheat country. The 5010/20 that came out later did a lot more for JD then the smaller NG tractors in Montana. Our first NG tractor was a 4020 diesel powershift. Traded in a 830 for it. A year later we traded in a R for a 5010. So our switch was pretty fast.
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Today's Featured Article - Measuring with Calipers - by Staff. The legs of inside calipers are curved outward at the extremities to facilitate measuring small holes, while outside caliper legs have a large curve inward to increase their capacity for large work. Firm-joint calipers are adjusted approximately by the hands and then set to the feel of the work by tapping them on a metal surface. It is a common practice when opening calipers by this means to tap the top of the joint. It is better, if possible, to tap the inside of the legs, as repeated blo
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