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86-561: 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) wide and 7 feet (2.1 m) high. This increased the blade capacity to 45 cu yd (34 m). The D11N's weight was 204,517 pounds (92,767 kg). It

172-473: A Caliph) on their way to Guerrero, Mexico where they played a future role in the wars of independence . Sebastián Vizcaíno explored and mapped the coast of California in 1602 for New Spain , putting ashore in Monterey . Despite the on-the-ground explorations of California in the 16th century, Rodríguez's idea of California as an island persisted. Such depictions appeared on many European maps well into

258-424: A Carrydozer version. Komatsu developed a lengthened Superdozer undercarriage with two additional rollers per side to reduce wear, a step that Caterpillar avoided for their Carrydozer machines. The Carrydozer had the structure strengthened considerably for the extra weight and the much bigger blade that it carried up front, also, the ripper was fitted with an additional counterweight block. Both D11R and D11R CD received

344-459: A Spanish navigator." The name most likely derived from the mythical island of California in the fictional story of Queen Calafia , as recorded in a 1510 work The Adventures of Esplandián by Garci Rodríguez de Montalvo . Queen Calafia's kingdom was said to be a remote land rich in gold and pearls, inhabited by beautiful Black women who wore gold armor and lived like Amazons , as well as griffins and other strange beasts. Abbreviations of

430-553: A combined power of 1,300 hp (970 kW), and weighing 183 short tons (166 t), in the 1980s, but this was a custom built model. These images are of a Caterpillar D11R III. Caterpillar D10 The Caterpillar D10 is a bulldozer manufactured by Caterpillar Inc. between 1977 and 1987, when it was superseded by the D11 . It was the first modern tractor to use the elevated drive sprocket to improve durability, operator comfort, and ease of maintenance. The Caterpillar D10

516-598: A commodity until the 1849 California Gold Rush . From the 1820s, trappers and settlers from the United States and Canada began to arrive in Northern California. These new arrivals used the Siskiyou Trail , California Trail , Oregon Trail and Old Spanish Trail to cross the rugged mountains and harsh deserts in and surrounding California. The early government of the newly independent Mexico

602-576: A free state, the "loitering or orphaned Indians", were de facto enslaved by their new Anglo-American masters under the 1850 Act for the Government and Protection of Indians . One of these de facto slave auctions was approved by the Los Angeles City Council and occurred for nearly twenty years. There were many massacres in which hundreds of indigenous people were killed by settlers for their land. Between 1850 and 1860,

688-624: A modest home which in the 1960s cost $ 25,000 would cost half a million dollars or more in urban areas by 2005. More people commuted longer hours to afford a home in more rural areas while earning larger salaries in the urban areas. Speculators bought houses, expecting to make a huge profit in months, then rolling it over by buying more properties. Mortgage companies were compliant, as people assumed prices would keep rising. The bubble burst in 2007–8 as prices began to crash. Hundreds of billions in property values vanished and foreclosures soared, as financial institutions and investors were badly hurt. In

774-463: A new Caterpillar 3508B EUI electronically controlled unit injector diesel engine with electronic controls at 915 gross hp (682 kW). The Carrydozer's weight is just over 120 short tons (110 t) at 248,600 pounds (112,800 kg). 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

860-469: A part of Mexico. In 1846, the total settler population of the western part of the old Alta California had been estimated to be no more than 8,000, plus about 100,000 Native Americans, down from about 300,000 before Hispanic settlement in 1769. In 1848, only one week before the official American annexation of the area, gold was discovered in California, this being an event which was to forever alter both

946-748: A short break in 1862 when legislative sessions were held in San Francisco due to flooding in Sacramento . Once the state's Constitutional Convention had finalized its state constitution, it applied to the U.S. Congress for admission to statehood . On September 9, 1850, as part of the Compromise of 1850 , California became a free state and September   9 a state holiday . During the American Civil War (1861–1865), California sent gold shipments eastward to Washington in support of

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1032-612: A state Constitutional Convention was first held in Monterey. Among the first tasks of the convention was a decision on a location for the new state capital. The first full legislative sessions were held in San Jose (1850–1851). Subsequent locations included Vallejo (1852–1853), and nearby Benicia (1853–1854); these locations eventually proved to be inadequate as well. The capital has been located in Sacramento since 1854 with only

1118-621: Is Sacramento . The state's diverse geography ranges from the Pacific Coast and metropolitan areas in the west to the Sierra Nevada mountains in the east, and from the redwood and Douglas fir forests in the northwest to the Mojave Desert in the southeast. Two-thirds of the nation's earthquake risk lies in California. The Central Valley , a fertile agricultural area, dominates the state's center. The large size of

1204-657: Is also 850 hp (630 kW). It comes as a regular bulldozer and a Carrydozer like the previous model. As with the D11R, the D11T Carrydozer can push 57.9 cubic yards (44.3 m) while the regular D11T can push 45 cubic yards (34 m) of earth. A new D11T was on display at the Caterpillar display at Minexpo during the 22 to 24 September 2008 expo in Las Vegas, Nevada. The D11T and D11T CD are both powered by

1290-678: Is most commonly found in use in large scale forestry, mining, and quarry operations. D11s can be adapted for agricultural and rock ripping by fitting a ripper, a long claw-like device on the back of the tractor. Rippers can come singly (single shank) or in groups of two or more (multi shank rippers). Usually, a single shank is preferred for heavy ripping. Ripping rock allows the ground surface rock to be broken into small, easy to handle and transport rubble which can then be removed so that grading can take place. Agricultural ripping allows rocky or very hard earth to be broken up so that otherwise inarable land can be used for agriculture. For example, much of

1376-526: Is the home of Hollywood , the oldest and one of the largest film industries in the world, profoundly influencing global entertainment. The San Francisco Bay and the Greater Los Angeles areas are seen as the centers of the global technology and U.S. film industries, respectively. The Spaniards gave the name Las Californias to the peninsula of Baja California (in modern-day Mexico). As Spanish explorers and settlers moved north and inland,

1462-504: The Battle of Providencia near Los Angeles, he convinced each side that they had no reason to be fighting each other. As a result of Marsh's actions, they abandoned the fight, Micheltorena was defeated, and California-born Pio Pico was returned to the governorship. This paved the way to California's ultimate acquisition by the United States. In 1846, a group of American settlers in and around Sonoma rebelled against Mexican rule during

1548-652: The Bear Flag Revolt . Afterward, rebels raised the Bear Flag (featuring a bear, a star, a red stripe and the words "California Republic") at Sonoma. The Republic's only president was William B. Ide , who played a pivotal role during the Bear Flag Revolt. This revolt by American settlers served as a prelude to the later American military invasion of California and was closely coordinated with nearby American military commanders. The California Republic

1634-715: The California Master Plan for Higher Education in 1960 to develop an efficient system of public education. Meanwhile, attracted to the mild Mediterranean climate, cheap land, and the state's variety of geography, filmmakers established the studio system in Hollywood in the 1920s. California manufactured 9% of US armaments produced during World War II , ranking third behind New York and Michigan . California easily ranked first in production of military ships at drydock facilities in San Diego, Los Angeles, and

1720-566: The Graham Affair , which was resolved in part with the intercession of Royal Navy officials. One of the largest ranchers in California was John Marsh . After failing to obtain justice against squatters on his land from the Mexican courts, he determined that California should become part of the United States. Marsh conducted a letter-writing campaign espousing the California climate, the soil, and other reasons to settle there, as well as

1806-553: The Indigenous people of California had not yet developed a natural immunity. Under its new American administration, California's first governor Peter Hardeman Burnett instituted policies that have been described as a state-sanctioned policy of elimination of California's indigenous people. Burnett announced in 1851 in his Second Annual Message to the Legislature: "That a war of extermination will continue to be waged between

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1892-616: The Presidio of San Diego , the first religious and military settlements founded by the Spanish in California. By the end of the expedition in 1770, they would establish the Presidio of Monterey and Mission San Carlos Borromeo de Carmelo on Monterey Bay. After the Portolà expedition, Spanish missionaries led by Father-President Serra set out to establish 21 Spanish missions of California along El Camino Real ("The Royal Road") and along

1978-774: The Route 66 . From 1900 to 1965, the population grew from fewer than one million to the greatest in the Union. In 1940, the Census Bureau reported California's population as 6% Hispanic, 2.4% Asian, and 90% non-Hispanic white. To meet the population's needs, engineering feats like the California and Los Angeles Aqueducts ; the Oroville and Shasta Dams ; and the Bay and Golden Gate Bridges were built. The state government adopted

2064-527: The Treaty of Guadalupe Hidalgo (February 2, 1848) that ended the war, the westernmost portion of the annexed Mexican territory of Alta California soon became the American state of California, and the remainder of the old territory was then subdivided into the new American Territories of Arizona, Nevada, Colorado and Utah . The even more lightly populated and arid lower region of old Baja California remained as

2150-673: The coast of California were the members of a Spanish maritime expedition led by Portuguese captain Juan Rodríguez Cabrillo in 1542. Cabrillo was commissioned by Antonio de Mendoza , the Viceroy of New Spain , to lead an expedition up the Pacific coast in search of trade opportunities; they entered San Diego Bay on September 28, 1542, and reached at least as far north as San Miguel Island . Privateer and explorer Francis Drake explored and claimed an undefined portion of

2236-556: The elevated drive sprocket , or "High Drive" system, which results in a triangular, rather than oval, shaped track . The updated version of the Komatsu, the D575A , is the world's largest production bulldozer at 168 short tons (152 t) and 1,150 hp (860 kW). A bigger machine, the Acco super bulldozer , was built by Italian firm ACCO, with twin Caterpillar diesel engines giving

2322-507: The 1,786 cid V-12 twin turbocharged D348 in the D10 to power it. This had already proven itself in the 777 off-highway hauler and the 550 hp (410 kW) 10 yards (9.1 m) 992/992B wheel loaders from 1968 on. The early D10s came with a single big black exhaust stack up front. But some engine problems came up with exhaust system routing, which resulted in two exhaust stacks up front to correct this problem. This new look took root in 1980. At

2408-513: The 18th century. The Portolá expedition of 1769–70 was a pivotal event in the Spanish colonization of California, resulting in the establishment of numerous missions, presidios , and pueblos . The military and civil contingent of the expedition was led by Gaspar de Portolá , who traveled over land from Sonora into California, while the religious component was headed by Junípero Serra , who came by sea from Baja California . In 1769, Portolá and Serra established Mission San Diego de Alcalá and

2494-491: The 1992 Rodney King riots. California was the hub of the Black Panther Party , known for arming African Americans to defend against racial injustice. Mexican, Filipino, and other migrant farm workers rallied in the state around Cesar Chavez for better pay in the 1960s and 70s. During the 20th century, two great disasters happened: the 1906 San Francisco earthquake and 1928 St. Francis Dam flood remain

2580-403: The 21st century, droughts and frequent wildfires attributed to climate change have occurred. From 2011 to 2017, a persistent drought was the worst in its recorded history. The 2018 wildfire season was the state's deadliest and most destructive. One of the first confirmed COVID-19 cases in the United States occurred in California on January 26, 2020. A state of emergency was declared in

2666-558: The CAT C32 engine with ACERT technology. The D11R and the D11T differ in the configuration and layout of their operator controls; several levers have been changed into electronic switches, and several controls have been moved for increased visibility. Another difference is that the D11T has its exhaust mufflers closer to the front of the cab, similar to the D10T. They stand taller than the ones on

Caterpillar D11 - Misplaced Pages Continue

2752-522: The California coast in 1579, landing north of the future city of San Francisco . The first Asians to set foot on what would be the United States occurred in 1587, when Filipino sailors arrived in Spanish ships at Morro Bay . Coincidentally the descendants of the Muslim Caliph Hasan ibn Ali in formerly Islamic Manila and had converted, then mixed Christianity with Islam, upon Spanish conquest, transited through California (Named after

2838-526: The California coast, 16 sites of which having been chosen during the Portolá expedition. Numerous major cities in California grew out of missions, including San Francisco ( Mission San Francisco de Asís ), San Diego ( Mission San Diego de Alcalá ), Ventura ( Mission San Buenaventura ), or Santa Barbara ( Mission Santa Barbara ), among others. Juan Bautista de Anza led a similarly important expedition throughout California in 1775–76, which would extend deeper into

2924-534: The California government in 2022. These groups were also diverse in their political organization, with bands, tribes, villages, and, on the resource-rich coasts, large chiefdoms , such as the Chumash , Pomo and Salinan . Trade, intermarriage, craft specialists, and military alliances fostered social and economic relationships between many groups. Although nations would sometimes war, most armed conflicts were between groups of men for vengeance . Acquiring territory

3010-443: The California state government paid around 1.5   million dollars (some 250,000 of which was reimbursed by the federal government) to hire militias with the stated purpose of protecting settlers, however these militias perpetrated numerous massacres of indigenous people. Indigenous people were also forcibly moved to reservations and rancherias, which were often small and isolated and without enough natural resources or funding from

3096-513: The D11N/D11R. In November 2018, a number of enhancements were introduced and announced for the current D11T/D11T CD machines. These machines are so big that they must be partially dismantled for shipment to most sites. Some are shipped in the United States by railroad flatcars with the blade, push arms and ripper frame removed. Others are dismantled into several units for transport by multiple semi-trailer trucks . The dozer blade on front of

3182-424: The D11R were fingertip controls and electronic clutch and brakes. The finger tip controls (FTC) allowed the D11R to be steered with small fingertip clutches 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 cy ( 43.6 m³) to be pushed. This blade design was introduced by Komatsu on their D575 A-2 dozers in 1995 as

3268-558: The D9L, and the new D11N replacing the D10. The D10 was large enough to do about 50 percent more production than the D9H. 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; this tractor was discontinued a year later, and the only other tractor to use

3354-527: The SALT (Sealed and Lubricated Track), a permanently lubricated track system which was introduced on their track-type tractors in the early 1970s. When the D10 was introduced in 1977, it was the most powerful track-type tractor ever built at 700 horsepower (520 kW) . The Cat D10 could be ordered with up to a 19-foot (5.8 m) U-blade, and weighed in at 180,000 lb (82,000 kg). Later versions weighed in at 190,000 lb (86,000 kg). The U-blade

3440-624: The San Francisco Bay Area. Due to the hiring opportunities California offered during the conflict, the population multiplied from the immigration it received due to the work in its war factories, military bases, and training facilities. After World War II, California's economy expanded due to strong aerospace and defense industries, whose size decreased following the end of the Cold War . Stanford University began encouraging faculty and graduates to stay instead of leaving

3526-585: The Superdozer version. The deeper curvature of the Carrydozer/Superdozer blades literally carry the dirt moved, and the weight of the load increases pressure on the undercarriage and is thereby increasing the traction of the bulldozer. The increased weight on the undercarriage means also higher contact pressure between rollers and track links, which can increase wear significantly. These higher undercarriage costs must be considered when opting for

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3612-497: The U.S. Army. In the 20th century, thousands of Japanese people migrated to California. The state in 1913 passed the Alien Land Act , excluding Asian immigrants from owning land. During World War II, Japanese Americans in California were interned in concentration camps; in 2020, California apologized. Migration to California accelerated during the early 20th century with the completion of transcontinental highways like

3698-454: The Union . However, due to the existence of a large contingent of pro-South sympathizers within the state, the state was not able to muster any full military regiments to send eastwards to officially serve in the Union war effort. Still, several smaller military units within the Union army, such as the "California 100 Company" , were unofficially associated with the state of California due to a majority of their members being from California. At

3784-602: The best land in the California wine country consists of old lava flows . Ripping shatters the igneous rock, allowing the growth of wine grapes. Hard earth can also be ripped and decompacted to allow the planting of orchards which otherwise could not grow on the land. The nearest direct competitor to the Caterpillar D11 is the Komatsu D475 . The Caterpillar D11 can be distinguished from the Komatsu D475 by

3870-454: The best land in the state, were secularized by 1834 and became the property of the Mexican government. The governor granted many square leagues of land to others with political influence. These huge ranchos or cattle ranches emerged as the dominant institutions of Mexican California. The ranchos developed under ownership by Californios (Hispanics native of California) who traded cowhides and tallow with Boston merchants. Beef did not become

3956-464: The best route to follow, which became known as "Marsh's route". His letters were read, reread, passed around, and printed in newspapers throughout the country, and started the first wagon trains rolling to California. After ushering in the period of organized emigration to California, Marsh became involved in a military battle between the much-hated Mexican general, Manuel Micheltorena and the California governor he had replaced, Juan Bautista Alvarado. At

4042-464: The blade and rear implements. The high-drive system also eliminates the traditional geared final drive in favor of a modular system employing a hydraulic planetary final drive, which withstands engine torque better, since it distributes the forces over multiple gear teeth instead of a single tooth as in the traditional system. The disadvantage is that the track moves around one more idler, reducing track life. Caterpillar claims to have alleviated this with

4128-469: The concept until the D10's introduction was the Cletrac Model F, built between 1920 and 1922. The elevated sprocket system was first applied to a 10-machine test run of the D10 in 1977. It separated the suspension from the tractor's drive train, dramatically reducing stress on both and increasing their durability. Prior to this, the combined system, which put the drive axle under constant strain of

4214-551: The conquest include the Battle of San Pasqual and the Battle of Dominguez Rancho in Southern California, as well as the Battle of Olómpali and the Battle of Santa Clara in Northern California. After a series of defensive battles in the south, the Treaty of Cahuenga was signed by the Californios on January 13, 1847, securing a censure and establishing de facto American control in California. Following

4300-535: The deadliest in U.S. history. Although air pollution has been reduced, health problems associated with pollution continue. Brown haze known as " smog " has been substantially abated after federal and state restrictions on automobile exhaust. An energy crisis in 2001 led to rolling blackouts , soaring power rates, and the importation of electricity from neighboring states. Southern California Edison and Pacific Gas and Electric Company came under heavy criticism. Housing prices in urban areas continued to increase;

4386-626: The government to adequately sustain the populations living on them. As a result, settler colonialism was a calamity for indigenous people. Several scholars and Native American activists, including Benjamin Madley and Ed Castillo , have described the actions of the California government as a genocide , as well as the 40th governor of California Gavin Newsom . Benjamin Madley estimates that from 1846 to 1873, between 9,492 and 16,092 indigenous people were killed, including between 1,680 and 3,741 killed by

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4472-459: The highest output of any U.S. state, and is led by its dairy , almonds , and grapes . With the busiest port in the country ( Los Angeles ), California plays a pivotal role in the global supply chain, hauling in about 40% of goods imported to the US. Notable contributions to popular culture , ranging from entertainment , sports , music , and fashion , have their origins in California. California

4558-410: The indigenous peoples developed complex forms of ecosystem management, including forest gardening to ensure the regular availability of food and medicinal plants . This was a form of sustainable agriculture . To mitigate destructive large wildfires from ravaging the natural environment, indigenous peoples developed a practice of controlled burning . This practice was recognized for its benefits by

4644-572: The interior and north of California. The Anza expedition selected numerous sites for missions, presidios, and pueblos, which subsequently would be established by settlers. Gabriel Moraga , a member of the expedition, would also christen many of California's prominent rivers with their names in 1775–1776, such as the Sacramento River and the San Joaquin River . After the expedition, Gabriel's son, José Joaquín Moraga , would found

4730-531: The largest dam removal and river restoration project in US history was announced for the Klamath River , as a win for California tribes. Covering an area of 163,696 sq mi (423,970 km ), California is the third-largest state in the United States in area, after Alaska and Texas . California is one of the most geographically diverse states in the union and is often geographically bisected into two regions, Southern California , comprising

4816-844: The middle of the state lies the California Central Valley , bounded by the Sierra Nevada in the east, the coastal mountain ranges in the west, the Cascade Range to the north and by the Tehachapi Mountains in the south. The Central Valley is California's productive agricultural heartland. Divided in two by the Sacramento-San Joaquin River Delta , the northern portion, the Sacramento Valley serves as

4902-533: The north, Nevada and Arizona to the east, and shares an international border with the Mexican state of Baja California to the south. With nearly 39   million residents across an area of 163,696 square miles (423,970 km ), it is the most populous U.S. state, the third-largest by area, and most populated subnational entity in North America . Prior to European colonization , California

4988-414: The population of San Francisco increased from 500 to 150,000. The seat of government for California under Spanish and later Mexican rule had been located in Monterey from 1777 until 1845. Pio Pico, the last Mexican governor of Alta California, had briefly moved the capital to Los Angeles in 1845. The United States consulate had also been located in Monterey, under consul Thomas O. Larkin . In 1849,

5074-733: The pueblo of San Jose in 1777, making it the first civilian-established city in California. During this same period, sailors from the Russian Empire explored along the northern coast of California. In 1812, the Russian-American Company established a trading post and small fortification at Fort Ross on the North Coast . Fort Ross was primarily used to supply Russia's Alaskan colonies with food supplies. The settlement did not meet much success, failing to attract settlers or establish long term trade viability, and

5160-469: The races until the Indian race becomes extinct must be expected. While we cannot anticipate the result with but painful regret, the inevitable destiny of the race is beyond the power and wisdom of man to avert." As in other American states, indigenous peoples were forcibly removed from their lands by American settlers , like miners, ranchers, and farmers. Although California had entered the American union as

5246-403: The region known as California , or Las Californias , grew. Eventually it included lands north of the peninsula, Alta California , part of which became the present-day U.S. state of California. A 2017 state legislative document states, "Numerous theories exist as to the origin and meaning of the word 'California, ' " and that all anyone knows is the name was added to a map by 1541 "presumably by

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5332-654: The state as part of the Gold Rush or to seek work. Even though the Chinese proved indispensable in building the transcontinental railroad from California to Utah, perceived job competition with the Chinese led to anti-Chinese riots in the state, and eventually the US ended migration from China partially as a response to pressure from California with the 1882 Chinese Exclusion Act . Under earlier Spanish and Mexican rule, California's original native population had precipitously declined, above all, from Eurasian diseases to which

5418-465: The state on March 4, 2020, and remained in effect until Governor Gavin Newsom ended it in February 2023. A mandatory statewide stay-at-home order was issued on March 19, 2020, which was ended in January 2021. Cultural and language revitalization efforts among indigenous Californians have progressed among tribes as of 2022. Some land returns to indigenous stewardship have occurred. In 2022,

5504-430: The state results in climates that vary from moist temperate rainforest in the north to arid desert in the interior, as well as snowy alpine in the mountains . Droughts and wildfires are an ongoing issue. California's economy is the largest of any U.S. state, with a $ 4.0 trillion gross state product as of 2024 . It is the largest sub-national economy in the world. California's agricultural industry has

5590-515: The state's demographics and its finances. Soon afterward, a massive influx of immigration into the area resulted, as prospectors and miners arrived by the thousands. The population burgeoned with United States citizens, Europeans, Middle Easterns, Chinese and other immigrants during the great California gold rush . By the time of California's application for statehood in 1850, the settler population of California had multiplied to 100,000. By 1854, more than 300,000 settlers had come. Between 1847 and 1870,

5676-522: The state's name include CA, Cal., Calif., Califas , and US-CA . California was one of the most culturally and linguistically diverse areas in pre-Columbian North America . Historians generally agree that there were at least 300,000 people living in California prior to European colonization. The Indigenous peoples of California included more than 70 distinct ethnic groups , inhabiting environments ranging from mountains and deserts to islands and redwood forests. Living in these diverse geographic areas,

5762-560: The state, and develop a high-tech region, now known as Silicon Valley . As a result of this, California is a world center of the entertainment and music industries, of technology, engineering, and the aerospace industry, and as the US center of agricultural production. Just before the Dot Com Bust , California had the fifth-largest economy in the world. In the mid and late twentieth century, race-related incidents occurred. Tensions between police and African Americans, combined with unemployment and poverty in inner cities, led to riots, such as

5848-449: The ten southernmost counties, and Northern California , comprising the 48 northernmost counties. It is bordered by Oregon to the north, Nevada to the east and northeast, Arizona to the southeast, the Pacific Ocean to the west and shares an international border with the Mexican state of Baja California to the south (with which it makes up part of The Californias region of North America , alongside Baja California Sur ). In

5934-402: The time Caterpillar's bulldozer lineup was the 62 hp (46 kW) D3, 75 hp (56 kW) D4E, 105 hp (78 kW) D5B, 140 hp (100 kW) D6D, 200 hp (150 kW) D7G, 300 hp (220 kW) D8K, and 410 hp (310 kW) D9H with the addition of the 700 hp (520 kW) D10. In 1986 an even larger dozer, the 770 hp (570 kW) Caterpillar D11⁣⁣N ,

6020-407: The time of California's admission into the Union, travel between California and the rest of the continental United States had been a time-consuming and dangerous feat. Nineteen years later, and seven years after it was greenlighted by President Lincoln, the first transcontinental railroad was completed in 1869. California was then reachable from the eastern States in a week's time. Much of the state

6106-417: The tractor usually comes in three varieties: There is also a special "Coal U-Blade", capable of carrying 74.9 cubic metres (98.0 cu yd). These are only attached to bulldozers that work solely on coal. D11s are primarily used for moving large quantities of material (dirt, rock, aggregate , soil etc.) short distances in relatively confined places. For example, they are often used in quarries. The D11

6192-570: The transition from Spanish colonial rule to independent Mexican rule. In 1821, the Mexican War of Independence gave the Mexican Empire (which included California) independence from Spain. For the next 25 years, Alta California remained a remote, sparsely populated, northwestern administrative district of the newly independent country of Mexico, which shortly after independence became a republic. The missions , which controlled most of

6278-496: The vehicle's load and terrain beneath it, was prone to frequent failure. Elevating the drive sprocket allowed for a more absorbent suspension, which provided better traction, reduced component wear and operator fatigue, and isolated the drive sprocket in a flexible section of the machine's tracks. It also allowed for the relocation of the transmission behind and beneath the operator, providing better weight distribution and improved traction, and permitting more compact location of both

6364-464: Was 7 feet (2.1 m) high and could push 35 cu yd (27 m ) according to Caterpillar's literature. The November 1977 issue of Excavating Contractor magazine had a 2-page story on the bulldozer titled "Cat Uncorks The New D10". One of the first D10s is currently sitting in front of the East Peoria, Ill plant where it was made. A picture of this D10 can be found on pages of a book titled "The Caterpillar Century" on pages 298-297. Caterpillar put

6450-544: Was abandoned by 1841. During the War of Mexican Independence , Alta California was largely unaffected and uninvolved in the revolution, though many Californios supported independence from Spain , which many believed had neglected California and limited its development. Spain's trade monopoly on California had limited local trade prospects. Following Mexican independence, California ports were freely able to trade with foreign merchants. Governor Pablo Vicente de Solá presided over

6536-552: Was extremely well suited to fruit cultivation and agriculture in general. Vast expanses of wheat, other cereal crops, vegetable crops, cotton, and nut and fruit trees were grown (including oranges in Southern California), and the foundation was laid for the state's prodigious agricultural production in the Central Valley and elsewhere. In the nineteenth century, a large number of migrants from China traveled to

6622-607: Was highly unstable, and in a reflection of this, from 1831 onwards, California also experienced a series of armed disputes, both internal and with the central Mexican government. During this tumultuous political period Juan Bautista Alvarado was able to secure the governorship during 1836–1842. The military action which first brought Alvarado to power had momentarily declared California to be an independent state, and had been aided by Anglo-American residents of California, including Isaac Graham . In 1840, one hundred of those residents who did not have passports were arrested, leading to

6708-616: Was introduced at a dealer meeting by Caterpillar in the fall of 1977. Between 1978 and 1986 nearly 1,000 D10s were made at Caterpillar's East Peoria , Illinois, plant. The D10 had sales of their Fiat-Allis / Komatsu competitive sized bulldozers combined. With the introduction of the N-Series tractors in 1986-87 their model numbers were pushed up, resulting in the D9N replacing the D8L, the D10N replacing

6794-627: Was introduced to replace the D10. The D11 carried on the success of the elevated drive sprocket system in large bulldozers. The currently available D10T model, and preceding D10R and D10N variants, are not the original D10's successors but the D11N, D11R and the current D11T are. California California is a state in the Western United States , lying on the American Pacific Coast . It borders Oregon to

6880-743: Was introduced. For example, the Fiat-Allis 41-B track-type tractor had 524 hp (391 kW) at the time, while the D9H had 410 hp (310 kW). In 1976 Japanese company Komatsu came out with an even larger bulldozer called the D455A at 620 hp (460 kW) and 167,000 lb (76,000 kg). The first pilot D10 was D10X1 and was shown in July 1973 at a big Caterpillar corporate meeting. Other prototypes would follow in 1975 and 1977. In March 1977, prototypes P-1 through P-10 would appear and be subsequently dispatched to different job sites. The D10

6966-714: Was not usually the purpose of these small-scale battles. Men and women generally had different roles in society. Women were often responsible for weaving, harvesting, processing, and preparing food, while men for hunting and other forms of physical labor. Most societies also had roles for people whom the Spanish referred to as joyas , who they saw as "men who dressed as women". Joyas were responsible for death , burial , and mourning rituals , and they performed women's social roles. Indigenous societies had terms such as two-spirit to refer to them. The Chumash referred to them as 'aqi. The early Spanish settlers detested and sought to eliminate them. The first Europeans to explore

7052-666: Was one of the most culturally and linguistically diverse areas in pre-Columbian North America . European exploration in the 16th and 17th centuries led to the colonization by the Spanish Empire . The area became a part of Mexico in 1821, following its successful war for independence , but was ceded to the United States in 1848 after the Mexican–American War . The California gold rush started in 1848 and led to social and demographic changes, including depopulation of Indigenous tribes. The western portion of Alta California

7138-736: 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 in Las Vegas, Nevada , at MINExpo International in 1996. Both were 770 hp (570 kW) and that would be increased to 850 hp (630 kW) later in 1997. Other improvements made to

7224-502: Was short-lived; the same year marked the outbreak of the Mexican–American War (1846–1848). Commodore John D. Sloat of the United States Navy sailed into Monterey Bay in 1846 and began the U.S. military invasion of California , with Northern California capitulating in less than a month to the United States forces. In Southern California, Californios continued to resist American forces. Notable military engagements of

7310-579: Was the result of a need for a tractor larger than the Caterpillar D9 . At this time, competitors were building bulldozers that were more powerful than the D9. Allis Chalmers introduced at Conexpo 69 in Chicago a 524 hp (391 kW) HD-41 which was the largest crawler in the world. In 1974 after Allis Chalmers and Fiat merged their construction equipment divisions, the 524 hp (391 kW) 41-B

7396-399: Was then organized and admitted as the 31st state in 1850 , as a free state , following the Compromise of 1850 . The Greater Los Angeles and San Francisco Bay areas are the nation's second- and fifth-most populous urban regions , with 19 million and 10 million residents respectively. Los Angeles is the state's most populous city and the nation's second-most ; California's capital

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