Development
Komatsu first showed a 1,000 horsepower (750 kW) bulldozer prototype, the D555A, to the public at the Conexpo equipment exhibition in Houston, Texas in 1981. Due to economic conditions at the time, development was stalled for much of the 1980s. A successor to the D555A prototype, the D575A-2 SR Super Ripper, began field testing in North America in 1989, and full production began in 1991. The D575A-2 SR Super Ripper was joined by the D575A-2 SD Super Dozer in 1995 when the first D575A-2 SD Super Dozer was purchased and placed into service by the Princess Beverly Coal Co. in Cabin Creek, West Virginia. The current model, the D575A-3 SD Super Dozer was introduced in 2001.
Read more about this topic: Komatsu D575A
Famous quotes containing the word development:
“For decades child development experts have erroneously directed parents to sing with one voice, a unison chorus of values, politics, disciplinary and loving styles. But duets have greater harmonic possibilities and are more interesting to listen to, so long as cacophony or dissonance remains at acceptable levels.”
—Kyle D. Pruett (20th century)
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—Sylvia Ann Hewitt (20th century)