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Another major design using cast steel side frames with
separate journal boxes was the Vulcan truck, developed by
American Steel Foundries. Vulcan side frames had pedestal
jaws into which the journal boxes were bolted.
10
10: The Crown truck was a heavy duty 70-ton version of
the Andrews design used in the teens by the Pennsylvania
Railroad on gondolas, hoppers, and flat cars.
11
11: During and after World War I, the United States
Railway Administration built 100,000 cars to overcome the
nation's shortage of modern freight cars, and all of them
were equipped with U-section Andrews trucks of 40-, 50-,
or 70-ton capacity. This is a 50-ton USRA Andrews truck.
Freight Car Trucks - 6
As with Andrews trucks, early Vulcans had L-section side
frames (12) but later ones employed stronger U-section side
frames (13).
12
12: Vulcan trucks had separate journal boxes, like
Andrews trucks, but in the Vulcan design the boxes fit into
pedestal jaws and were secured in place by transverse
bolts at the top. This is a T-section Vulcan truck.
13
13: A later U-section version of the Vulcan design. The
bolts that held the journal boxes in place are visible
behind the journal box lid springs.
index contents
MRH-May 2013