Caterpillar D9
| Caterpillar D9 | |
|---|---|
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| Type | Heavy bulldozer |
| Manufacturer | Caterpillar |
| Length | 26.5 ft (8.1 m) |
| Width | 14.7 ft (4.5 m) (blade) |
| Height | 13 ft (4.0 m) |
| Weight | 108,000 lb (48,988 kg) |
| Propulsion | Caterpillar tracks |
| Engine model |
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| Gross power |
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| Flywheel power |
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| Drawbar pull | 71.6 tons |
| Speed |
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| Blade capacity |
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The Caterpillar D9 is a large track-type tractor designed and manufactured by Caterpillar Inc. It is usually sold as a bulldozer equipped with a detachable large blade and a rear ripper attachment.
The D9, with 354 kW (474 hp) of gross power and an operating weight of 49 tons, is in the upper end of Caterpillar's track-type tractors, which range in size from the D3 57 kW (77 hp), 8 tons, to the D11 698 kW (935 hp), 104 tons.
The size, durability, reliability, and low operating costs have made the D9 one of the most popular large track-type tractors in the world. The Komatsu D275A is one of its most direct competitors.
The D9 is a series of heavy tracked-type tractors, propelled by Caterpillar tracks and usually used as bulldozers. The series began in 1954 with a prototype tractor called the D9X. Ten D9X prototype models were built in 1954. In 1955, the 286 hp (213 kW) D9 was introduced to compete against the more powerful Euclid TC-12. The D9 came equipped with a 1,473 cid D353 which powered the D9 right up until the 1980 introduction of the D9L. In 1956 the D9 had its engine power raised to 320 hp (240 kW). The new 335 hp (250 kW) D9E replaced that model in 1959. Two years later, in 1961, the legendary 385 hp (287 kW) D9G was introduced, that remained in production for 13 years. Over its 13-year life the D9G became the main crawler on many job sites, testifying to its sturdiness and design.
In 1965, West Coast businessman Buster Peterson hooked up a pair of D9Gs to pushload the largest wheel tractor scrapers built. In 1986 Caterpillar bought the rights to this concept and thus the 770 hp (570 kW) DD9G was created (D stands for Dual D9G). Peterson also built the first SxS D9G which has two D9Gs side-by-side, pushing a 24-foot (7.3 m) wide bulldozer blade.
In 1969, Caterpillar introduced this new SxS D9G. In 1974, the improved 410 hp (310 kW) D9H was introduced to replace the D9G. The D9H is still the most powerful conventional track-type tractor in company history. The DD9H and the SxsD9H would soon follow.
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Wikipedia