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Brockway Motor Company was a builder of custom heavy-duty trucks in Cortland, New York from 1912 to 1977. It was founded as Brockway Carriage Works in 1875 by William Brockway. His son George Brockway later turned the carriages into a truck manufacturer in 1909.
During World War II Brockway manufactured G547 and G690 6 ton 6X6 bridging trucks, part of a standard design series also built by Corbitt and White. G547 “Treadway” trucks had a large hoist on the rear for self-unloading, while the G690 chassis were fitted with “Quickway” cranes, also used in bridging operations. 
All 6 ton military trucks (of all manufacturers) had Hercules HXD 855c.i. engines, developing 202 hp @ 2150 rpm and 642 ft/lbs of torque @ 900 rpm. Cummins engines were primarily used in Brockways though many were powered by Detroit Diesels. Some Brockway trucks were equipped with inline six engines fitted with Rochester 2G (DualJet) carburetors.
There is a Brockway Truck show in Cortland each year with many events occurring at the official Brockway Museum located in Homer, NY at the Central New York Living History Center.
A documentary about the trucks and the Brockway company is available from Wiffle Ball Productions in Cortland, New York.
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