To repair the machines, one breaks down the tracks and pulls the drive sprockets out. The elevated-drive-sprocket undercarriage is a modular design. The new undercarriage design reduced strain and shock loads on the final drives and gave the "belly pan" more ground clearance. The unit featured the same new type of elevated drive sprocket undercarriage as had been introduced on the larger D10 in 1977. The D9H is still the most powerful conventional track-type tractor in company history. In 1974, the improved 410 hp (310 kW) D9H was introduced to replace the D9G. In 1969, Caterpillar introduced this new SxS 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 1968, Caterpillar bought the rights to this concept, thus the 770 hp (570 kW) DD9G was created (DD stands for Dual D9G). In 1965, West Coast businessman Buster Peterson hooked up a pair of D9Gs to pushload the largest wheel tractor scrapers built. Two years later, the legendary 385 hp (287 kW) D9G was introduced it remained in production for 13 years it became the main crawler on many job sites, testifying to its sturdiness and design. The new 335 hp (250 kW) D9E replaced that model in 1959. In 1956, the D9 had its engine power raised to 320 hp (240 kW). The D9 came equipped with a 1,473 cid D353, which powered the D9 until the 1980 introduction of the D9L. In 1955, the 286 hp (213 kW) D9 was introduced to compete against the more powerful Euclid TC-12. Ten D9X prototype models were built in 1954.
#D5 bulldozer weight series
The series began in 1954 with a prototype tractor called the D9X. The D9 is a series of heavy tracked-type tractors, carried on continuous tracks and usually used as bulldozers. The size, durability, reliability, and low operating costs have made the D9 one of the most popular large track-type tractors in the world.Įngineering and technical description The D9, with 354 kW (474 hp) of gross power and an operating weight of 49 short tons (44 t), is in the upper end of Caterpillar's track-type tractors, which range in size from the D3 57 kW (77 hp), 8 short tons (7.3 t), to the D11 698 kW (935 hp), 104 short tons (94 t). It is usually sold as a bulldozer equipped with a detachable large blade and a rear ripper attachment.
The Caterpillar D9 is a large track-type tractor designed and manufactured by Caterpillar Inc. CAT D9T, the current generation of the Caterpillar D9 tracked-type tractor series.
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