Caterpillar D11
| Caterpillar D11 | |
|---|---|
 |
|
| Type | Heavy bulldozer |
| Manufacturer | Caterpillar |
| Length | 35.8 ft |
| Width | 10.4 ft (track) 22 ft (blade) |
| Height | 14.9 ft (top of stack) |
| Weight | 230,581 lb (104,589.8 kg) (operating weight) |
| Propulsion | Caterpillar tracks |
| Engine model | CAT C32 ACERT |
| Gross power | 936 hp (698 kW) |
| Flywheel power | 850 hp (634 kW) |
| Blade capacity | 57 yd³ |
The Caterpillar D11 is a large bulldozer, manufactured by Caterpillar Inc. in East Peoria, Illinois, and mainly used in the mining industry. Primarily designed as a bulldozer, it also used for push-loading scrapers, and ripping rock overburden.
The D11N was introduced in February 1986 to replace the D10. The D11N had some major improvements over the D10, it includes a bigger track and blade, and a longer track by 21 inches (0.53 m). The U blade was just under 21 feet (6.4 m) long and 7 feet (2.1 m) high. This increased the blade capacity to 45 cu yd (34 m3). The D11N's weight was 204,517 pounds (92,767 kg). It was powered by a 770 horsepower (570 kW), 2,105 cu in (34.49 L) 3508 V-8 Diesel engine. The D11N's improvements made it over 10 percent more productive than the D10. In 1987 a hydraulically powered impact ripper was added to the D11N which raised the weight up to 225,950 lb (102,490 kg). This would become known as the D11N Impact Ripper.
The D11R and D11R Carrydozer were introduced at the Las Vegas, Nevada at MINExpo International 1996. Both were 770 hp (570 kW) and that would be increased to 850 hp (630 kW) later in 1997. Other improvements made to the D11R were Fingertip Controls and Electronic Clutch and Brakes. The Finger Tip Controls (FTC) allowed the D11R to be steered with a single lever (joystick) on the left hand side. The D11R now weighed 230,935 lb (104,750 kg). The Carrydozer version has a special blade with a curvature that allowed 57 yards (52 m) to be pushed. The "Carrydozer" had the structure strengthened considerably for the extra weight and much bigger blade that it carried up front. Both D11Rs received a new Caterpillar 3508B EUI diesel engine with electronic controls at 915 gross hp. The Carrydozer versions weight is just over 120 tons at 248,600 pounds. According to Caterpillar by the year 2000 over 3,000 D11s had been produced at their plant in East Peoria.
The current D11T was introduced in early 2008 and is also 850 hp (630 kW). This comes as a regular bulldozer and a carrydozer like the previous model. As with the D11R, the D11T Carrydozer can push 57.9 yards (52.9 m) while the regular D11T can push 45 yards (41 m) of earth. A new D11T was on display at the Caterpillar display at Minexpo during the 22 to 24 September 2008 in Las Vegas, Nevada.
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