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The Caterpillar D4 track-type tractor is a small bulldozer manufactured by Caterpillar Inc. Caterpillar first introduced the RD4 in 1936, [ 1 ] as the diesel follow on to the successful CAT 30 gas model.
1935: RD8 (132 hp [98 kW]) introduced. 1937: The "R" prefix dropped, D8 debuts. 1940s: D8 2U Series (148 hp [110 kW]) introduced; 1950: D8 new front-rounded grill that would last until D8K was replaced by D8L in 1982.
D5N was replaced with the D6K low drive hystat dozer, becoming the D4 in 2021; D5 D5LGP (current version) released in 2019, as a replacement for the D6N. High drive power shift dozer. The following models originated with the MHI (Mitsubishi Heavy Industries) partnership, providing smaller, low drive dozers, in the 20,000 lb range.
The D11R now weighed 230,935 lb (104,750 kg). The Carrydozer version has a special blade with a curvature that allowed 57 cy ( 43.6 m³) to be pushed. This blade design was introduced by Komatsu on their D575 A-2 dozers in 1995 as the Superdozer version. The deeper curvature of the Carrydozer/Superdozer blades literally carry the dirt moved ...
CAT D10N at work in Rishon LeZion, Israel. Among modern tractors, the High Drive (elevated sprocket) design was unique to Caterpillar products. The concept originated in 1914 with Caterpillar predecessor C. L. Best Tractor's 30 Humpback; [citation needed] this tractor was discontinued a year later, and the only other tractor to use the concept until the D10's introduction was the Cletrac Model ...
The D575A-2 SD Super Dozer was the second version of the D575A, going into production alongside the D575A-2 SR Super Ripper beginning in 1995. [3] The D575A-2 SD Super Dozer is an 1,150 horsepower (860 kW), 143,300 kilograms (315,900 lb) dedicated dozer with no ripper. The D575A-2 SD Super Dozer was superseded by the D575A-3 SD Super Dozer.
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Manufacturer: Caterpillar Tractor Co. Stock No.: 78-8138.0-44 Peoria, Illinois Model: D4 1. General. — The D4 is designed for towing and all types of general construction work. Accurately located frame-holes are provided for attaching varied tractor equipment to adapt it for use in earth moving, road clearance, and airport construction work. 2.
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