Yes, they ran on four cylinders at low load to control white smoke (unburned fuel). Sales grabbed the "feature" and marketed it as a fuel saving advantage. By dropping out four cylinders, the load increased on the remaining cylinders which increased combustion temperature, and lowered/eliminated white smoke. Probably did improve fuel consumption a little at low load operation, because fuel was being utilized rather than just being spewed out. I read somewhere that they were built only because IH needed to move more V8's, and offering them in tractors was a means to get rid of them.
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Today's Featured Article - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
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