IH D282 do not need return lines as the nozzle valves are outward opening, not inward like the 361/407 injectors. Higher opening pressures do help with atomization, but is harder on pumps also unless designed for increased pressure load. There are many newer engines with 3500 to 4500 PSI opening pressure, and some still use Stanadyne and other rotary pumps just fine.
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Today's Featured Article - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
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