Excavator attachments include bulldozers, loaders, backhoes, graders, compactors, and wheel dozers. The excavator is a large arm machine used for digging deep holes and trenches, while the Fresno Scraper scrapes high spots and deposits earth at low points. Dump trucks and wheel loaders are also commonly used. Studded steel wheels provide superior traction in soft terrain.
Excavator attachments are available in a variety of configurations, from bulldozers to excavators. Loaders, dumpers and backhoes are all machines commonly found on any earthmoving site. Another common type of excavator attachment is the excavator, or track hoe as it is also called. This big arm machine is used to dig deep holes and trenches. Other forms of earthmoving equipment commonly seen on a construction site are graders, compactors, and wheel dozers. Many of the different types of excavator attachments feature studded steel wheels. These pieces of equipment are often duplicates of rubber-tired versions, however, the studded wheels provide superior traction in soft terrain.
When many people think of excavator attachments, the first machine that usually comes to mind is a bulldozer. The tracked machine with a large blade is well equipped to push a lot of material away. The excavator, a tracked machine with a bucket or shovel attached to the end of a long hinged arm, is capable of digging trenches like a backhoe, but on a much larger scale. The excavator is also used to load materials such as earth, debris and pieces of stone and concrete into dump trucks. With a mechanical thumb hitch, the excavator can even load and unload pipes, poles and other large materials.
The Fresno Scraper, or scraper as it is often called, is a large piece of excavator equipment that drags part of the machine along the ground, scraping high spots. He then deposits earth at low points on the site. Often requiring the assistance of another scraper or a bulldozer to push it through the high point when loading, the scraper is a common piece of excavator equipment on most large construction sites, especially on new roads. Dump trucks of many sizes are also commonly used excavator equipment and are invaluable for moving large amounts of material from an excavation site.
Large end loaders, or wheel loaders as they are sometimes called, use an articulated steering system to turn sharply when loading dump trucks. Rotating in the center with the aid of hydraulic cylinders, the articulated steering system uses two very strong drive axles with no weak steering elements to use. This allows the loader to carry huge loads in the bucket without worrying about breaking a knuckle. In some types of terrain, excavator attachments with steel studded wheels are used instead of rubber tires to increase traction. This excavator equipment requires special transport to and from the job site as it cannot operate on any public road.
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