Mostly used on construction site, a loader (also known as: bucket loader, front loader, front end loader, payloader, scoop loader, shovel, skip loader, and/or wheel loader) is a type of tractor, usually wheeled, sometimes on tracks, that has a front-mounted square wide bucket connected to the end of two booms (arms) to scoop up loose material from the ground, such as dirt, sand or gravel, and move it from one place to another without pushing the material across the ground. A wheel loader
is commonly used to move a stockpiled material from ground level and deposit it into an awaiting dump truck or into an open trench excavation. At Africa Machinery For Sale, used wheel loaders for sale are added everyday. A wheel loader can have several attachments in addition to the bucket that will allow the loader to be a versatile piece of machinery, attachments such as the Clam shell that allow the loader to do the work of a light dozer. Some loaders mount forks to lift heavy pallets.
Large loaders, such as the Kawasaki 95ZV-2, John Deere 844K, Caterpillar 950H, Volvo L120E, Case 921E, or Hitachi ZW310 usually have only a front bucket and are called Front Loaders, whereas small loader tractors are often also equipped with a small backhoe and are called backhoe loader
or loader backhoes or JCBs, after the company that first invented them.
Loaders or wheel loader are used mainly for uploading materials into trucks, laying pipe, clearing rubble, and digging. A loader is not the most efficient machine for digging as it cannot dig very deep below the level of its wheels, like a backhoe can. The capacity of a loader bucket can be anywhere from 0.5 to 36 m3  depending upon the size of the machine and its application. The front loader's bucket capacity is generally much bigger than a bucket capacity of a backhoe loader.
Unlike most bulldozers
, most loaders are wheeled and not tracked, although track loaders are common. They are successful where sharp edged materials in construction debris would damage rubber wheels, or where the ground is soft and muddy. Wheels provide better mobility and speed and do not damage paved roads as much as tracks, but provide less traction.
In construction areas loaders are also used to transport building materials - such as bricks, pipe, metal bars, and digging tools - over short distances. The most popular wheel loaders out there on the market are the Caterpillar Cat 938H, 950H, 950K, 966H, 980H, IT38H, 950 and the IT62H.
Cat Large size wheel loaders are Cat 988H, cat 990H, 988H, 993K, and the Cat 994F to name most of them