|
The Caterpillar D8 is a large track-type tractor designed and manufactured by Caterpillar. Though it comes in many configurations, it is usually sold as a bulldozer equipped with a detachable large blade and a rear ripper attachment. ==History== *1935: RD8 introduced. *1937: The "R" prefix dropped, D8 debuts. *1940s: 2U Series D8 introduced; engine power of 132 hp improved to 148 hp. *1950: D8 new front-rounded grill that would last until D8K was replaced by D8L in 1982. *1955: 1H Series D8 ends production; 191 hp D8E and D8D introduced with new 1,246 cubic inch displacement (CID) D342 diesel engine. D8D had a torque converter and D8E had a direct drive transmission. *1956: D8D replaced by D8G. *1956: D8E replaced by D8F. *1958: 235 hp D8H introduced. *1965: Power increased to 270 hp *1974: 300 hp D8K replaced the D8H. *1982: 335 hp D8L replaced D8K. The D8L was the first D8 with the elevated drive sprocket undercarriage. *1984: D8L SA (special application) for farming applications premiers. Available with a Three point hitch, for mounted implements. *1987: D8N at 285 hp which was unveiled at CONEXPO '87 in Las Vegas. It also had a differential steer transmission — the first track-type Caterpillar tractor to have one. *1996: 305 hp D8R replaced D8N. *2000: D8R Series 2 replaced the D8R. *2004: 310 hp D8T ACERT replaced D8R Series 2. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Caterpillar D8」の詳細全文を読む スポンサード リンク
|