I never saw such a machine but have seen many Euclid/Terex self loading scrapers. All of those that I saw were powered by 4 cylinder Detroits. Though not certain, I believe that they used single 471s in front and single 453s in back. Of course, both used Allison automatic transmissions with varialbe pitch torque converters. These machines were light years ahead of scrapers produced by Cat and others at the time.
Did your father's scraper use twin 471s in front to allow steering by adjusting the throttle of each engine? I do know that Euclid produced large bull dozers in the 50s and 60s that used twin 471s to allow steering without declutching either side by differential engine RPM. These machines, though more expensive, were also light years ahead of bull dozers offered by other manufacturers at the time.
The GM effort to produce a scraper (bull dozers were also anticipated) with diesel/electric power was intended to reduce manufacturing and maintenance costs by eliminating the second/third engine, transmission, etc. The project was shelved in the late 60s/early 70s due to the largely completed interstate highway project and resulting diminishing demand for such machines.
I believe that the efficiency improvements offered by electronic transmissions will eventually result in the application of such transmissions in virtually all markets, including farm tractors.
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