Caterpillar D8 - Cat 235

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CAT 235 / 245 Excavator - My CMS
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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.


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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
  • 1970: D8 46a 48a power increased 280 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.

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Blades

Several types of bulldozer blade can be used on the front of the tractor:

  • straight blade ("S-Blade"): A short blade with no lateral curve and no side wings. It can be used for fine grading
  • angle blade: held by an U shape frame that has three holes on each side, to set the blade to 3 positions: right, center, and left.
  • universal blade ("U-Blade"): A tall and very curved blade with large side wings to carry more material
  • "S-U" combination blade: A shorter blade with less curvature and smaller side wings

People use various other blade types, including landfill U-Blades, woodchip U-blades, and two-way blades for work inside the holds of ships.

Source of the article : Wikipedia



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