In principle, it can be said that loaders are included in one of the categories of giant road construction machines, which are widely used in construction works to carry mass of materials (such as soil and stone), loading trucks, excavation, drilling and Sometimes leveling (as a bulldozer) is used. Unlike scrapers, which are used simultaneously for loading and carrying, loaders should always be used together with transfer machines such as trucks.
Types of loader
Chain Loader Track loaders exert little pressure on the soil below them. This type of machine, having advantages such as good buoyancy and suitable traction power, can perform well in soft and swampy lands where rubber wheel loaders do not work well. Also, the performance of these devices on stony ground is very suitable compared to the type of rubber wheel that can be severely damaged. Chain wheel loaders have a suitable design for maneuvering in limited environments. The transfer of these loaders between different projects requires a trolley.
The pressure exerted on the ground by tires can be changed by changing the amount of tire inflation, but in any case, working with these loaders in wet and muddy ground is difficult due to the high pressure and their loading capacity in swampy ground. It will be less like a chain wheel. Of course, there are special wire chains to protect the tires, which can be used to increase the friction of the tires.
There is a possibility of tire damage in stony terrains with sharp corner stones, although a new type of tires with very thick treads have been produced that allow working in stony areas. Rubber wheel loaders have less traction than chain wheel loaders of the same weight, and as a result, their useful power in digging soil and going up or down slopes is limited. Rubber wheel type devices that are mounted on a backhoe tractor can have good steering characteristics in low places. The back-breaking nature of the loader allows an angle of up to 35 degrees in the horizontal plane of the machine axis between the two main parts of the machine.
