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The Caterpillar D8 is a track-type
cat.com it was superseded by the D9 in 1955. Though it comes in many configurations, it is usually sold as a
*1935: RD8 () introduced.
*1937: The "R" prefix dropped, D8 debuts.
*1940s: D8 2U Series () introduced
*1950: D8 new front-rounded grill that would last until D8K was replaced by D8L in 1982.
*1953: SD8-LGP produced 1953-59 for military use in Greenland and Antarctica. The "S" indicates the frame was stretched and came with 48" or 54" wide pads with a 15'-16' blade. In 1955 Cat came out with the 286 hp motor for the new D9s and the Seabees put them in their LGPs.
*1955: 1H Series D8 ends production; D8E and D8D introduced with new 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: D8H introduced.
*1965: Power increased to
*1970: D8 46a 48a power increased
*1974: D8K replaced the D8H.
*1982: 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 () with differential steer transmission, the first track-type Caterpillar tractor to have one (the new D8N was smaller than the old D8L size, which was replaced by the new D9N model).
*1996: D8R replaced D8N.
*2000: D8R Series 2 replaced the D8R.
*2004: D8T ACERT replaced D8R Series 2.
Caterpillar D-Series Track-Type Tractors
- Official Caterpillar website
* ttps://machineryline.es/-/miniexcavadoras--c166 Caterpillar D-Series Details {{Caterpillar Caterpillar Inc. vehicles Tractors Tracked vehicles Vehicles introduced in 1935
tractor
A tractor is an engineering vehicle specifically designed to deliver a high tractive effort (or torque) at slow speeds, for the purposes of hauling a Trailer (vehicle), trailer or machinery such as that used in agriculture, mining or constructio ...
designed and manufactured by Caterpillar
Caterpillars ( ) are the larval stage of members of the order Lepidoptera (the insect order comprising butterflies and moths).
As with most common names, the application of the word is arbitrary, since the larvae of sawflies (suborder ...
since 1935. Today, the largest in Caterpillar's medium range,Medium Dozerscat.com it was superseded by the D9 in 1955. Though it comes in many configurations, it is usually sold as a
bulldozer
A bulldozer or dozer (also called a crawler) is a large tractor equipped with a metal #Blade, blade at the front for pushing material (soil, sand, snow, rubble, or rock) during construction work. It travels most commonly on continuous tracks, ...
equipped with a detachable large blade and a rear ripper attachment.
The model offered in 2025 is a D8 - Tier 4/Stage V, equipped with a 363 hp Cat C15 engine and an operating weight of 87083 lb.
History
*1935: RD8 () introduced.
*1937: The "R" prefix dropped, D8 debuts.
*1940s: D8 2U Series () introduced
*1950: D8 new front-rounded grill that would last until D8K was replaced by D8L in 1982.
*1953: SD8-LGP produced 1953-59 for military use in Greenland and Antarctica. The "S" indicates the frame was stretched and came with 48" or 54" wide pads with a 15'-16' blade. In 1955 Cat came out with the 286 hp motor for the new D9s and the Seabees put them in their LGPs.
*1955: 1H Series D8 ends production; D8E and D8D introduced with new 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: D8H introduced.
*1965: Power increased to
*1970: D8 46a 48a power increased
*1974: D8K replaced the D8H.
*1982: 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 () with differential steer transmission, the first track-type Caterpillar tractor to have one (the new D8N was smaller than the old D8L size, which was replaced by the new D9N model).
*1996: D8R replaced D8N.
*2000: D8R Series 2 replaced the D8R.
*2004: D8T ACERT replaced D8R Series 2.Blades
Several types of bulldozer blade can be used on the front of the tractor: * Straight ("S-Blade"): A short blade with no lateral curve and no side wings. It can be used for fine grading * Angle: held by a U shape frame that has three holes on each side, to set the blade to 3 positions: right, center, and left. * Universal ("U-Blade"): A tall and very curved blade with large side wings to carry more material * "S-U" combination: A shorter blade with less curvature and smaller side wings Other blade types include landfill U-Blades, woodchip U-blades, and two-way blades for work inside the holds of ships.See also
* Heavy equipment (construction), Heavy equipment * G-numbers U.S. Army Cats * Caterpillar D9 * Caterpillar D7 * Bob Semple tankReferences
SNL G153 heavy tractorExternal links
Caterpillar D-Series Track-Type Tractors
- Official Caterpillar website
* ttps://machineryline.es/-/miniexcavadoras--c166 Caterpillar D-Series Details {{Caterpillar Caterpillar Inc. vehicles Tractors Tracked vehicles Vehicles introduced in 1935