Caterpillar marks 40 years of D10, and the tractor family it spawned
East Peoria Times-Courier
EAST PEORIA — Forty years ago this month, the doors of a new factory just across the Illinois River from Caterpillar Inc. headquarters opened for the first time to reveal a radically updated and enlarged tractor that the plant had been built to produce.
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Source: Caterpillar News