China's bulldozer R & D and production started only after the founding of new China. At first, the bulldozer was installed on the agricultural tractor. Simple and crude, low technical content, high fuel consumption. With the development of national econo

　　1、 Three types of bulldozer

　　The bulldozer is equipped with a bulldozer blade, which is mainly used for cutting or short-distance transportation of earthwork or bulk materials. Its production capacity is determined according to the engine power. The bulldozers used for highway construction are divided into three types: medium-sized (59-l03kw), large-sized (118-235kw) and Super Large-sized (more than 235Kw). Bulldozer is generally suitable for construction environment with strong seasonality, concentrated quantities and poor construction conditions.

　　2、 Applicable scope of common bulldozer

　　(1) Crawler type: this kind of bulldozer has the advantages of large adhesion, strong climbing ability, and is competent for the more dangerous working environment. It is a representative model of bulldozer and widely used in all kinds of earth and stone works.

　　(2) Tire type: this kind of bulldozer has the advantages of high speed, short cycle time, no damage to the road surface during transportation and transfer, and good mobility, which is suitable for municipal engineering.

　　(3) Special type: this kind of bulldozer is suitable for specific working conditions, including wetland bulldozer, amphibious bulldozer, underwater bulldozer, blasting bulldozer, cabin bulldozer, military fast bulldozer, etc.

　　3、 Maintenance of bulldozer

　　Every 250 hours of operation, the engine shall be provided with B guarantee (oil change, engine filter, diesel filter and air filter); 6000 hours with D guarantee (including the adjustment of fuel pump nozzle of C guarantee); the overhaul period is 10000-12000 hours, and the engine working environment is poor, which can be overhauled in 8000-10000 hours according to the vehicle conditions. According to the assumed service time, an overhaul shall be carried out once every six years. After the engine has been running for thousands of hours, there are often some small faults, such as motor, water pump, etc. Chassis parts, such as track shoes, guide wheels, roller, torque converter replacement and repair cycle, etc., depend on the use degree.

　　4、 Purpose of bulldozer

　　Bulldozer is a kind of machine which is composed of tractor as the original machine and bulldozer with soil cutting blade; it is used to clear land, road structures or similar work.

　　Bulldozer is a large-scale engineering vehicle, which is equipped with a large-scale metal bulldozer in front. When in use, put down the bulldozer, shovel and push mud, sand and stones forward. The position and angle of the bulldozer can be adjusted. Bulldozer can excavate, transport and unload soil independently, which has the characteristics of flexible operation, convenient rotation, small working face and fast driving speed. It is mainly applicable to the short-term transportation of the shallow excavation of class I to III soil, such as site clearing or leveling, foundation pit with small excavation depth and backfilling, and subgrade with small push height, etc.

　　Bulldozer is also a kind of short-distance self-propelled shovel transport machinery, which is mainly used for short-distance construction of 50-100m. Bulldozers are mainly used to excavate cutting, construct embankment, backfill foundation pit, remove obstacles, remove snow, level the site, etc. they can also be used to complete the shoveling and stacking of loose materials in a short distance. When the traction force of self-propelled scraper is insufficient, the bulldozer can also be used as a shovel aid, and the bulldozer plate can be used for pushing operation. The bulldozer is equipped with a scarifier, which can loosen hard soil, soft rock or gouged rock above grade III and IV, cooperate with the scraper for pre loosening operation, cooperate with the hydraulic backhoe digging device, winch towing and other auxiliary working devices, and can carry out excavation, rescue towing and other operations. The bulldozer can also use the hook to pull all kinds of towed machines and tools (such as towed scraper, towed vibratory roller, etc.) for operation. Bulldozer is one of the most commonly used operating machinery in the earth moving machinery, and plays a very important role in the earth moving construction machinery. Bulldozers play an important role in road, railway, airport, port and other transportation construction, mining, farmland reconstruction, water conservancy construction, large-scale power station and national defense construction.

　　5、 Purchase of bulldozer

　　It is a very difficult problem for users to choose a product suitable for their own engineering needs from a large number of bulldozer brands. Users should choose a bulldozer reasonably according to the size of the project scale and the power grade of the bulldozer. One attached drawing is for reference only.