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Andews vs Crown Trucks
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The Andrews truck was designed to replace the archbar truck by allowing use of the old journal boxes, etc. in a new cast frame. The journal boxes were attached to the Andrews frame in the same manner as they were attached to the archbar - with vertical bolts on each side of the journal box. This necessitated the frame member underneath the journal box. I suspect the Crown truck was the designation of the 70-ton Andrews truck used under the Pennsy H21 and H25 cars. N&W had 70-ton Andrews trucks under class HU (later H3) hoppers with "Andrews Floyd" cast into the side frames above the bolster opening. Were Crown and Floyd the designers of their respective trucks?
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