Analysis of foreign market road machinery shows that most of the mass production and sales volumes are bulldozers operating weight of 18 tons and engine power to 180 hp Leading foreign companies manufacture a tractor, as a rule, just a few basic models, industrial tractors and bulldozers, small class. Also available, and numerous modifications, such as loading modification, pipelaying, irrigation (swamp), etc. In such models are Caterpillar D3, D4, D5, D6. Y Komatsu - D31, D41, D58, D65. At Liebherr - PR 712, PR 722, PR 732. Some time in the Russia market, the small class was presented only one model bulldozer T-170m (T-10) operating weight 18,6 tons and engine power of 170 ... 180 hp This machine is now available on CHTZ-Uraltrak. Industrial tractors and bulldozers hauling smaller classes in Russia does not produce, except for modification of agricultural tractors T-4AP2 (ATZ) and DT-75 (OEM, Pavlodar, Kazakhstan) and bulldozers at their base: T-4AP. OBGN-4m operating weight 10,5 tons and engine power of 130 hp, RS-162-1 operating weight 7.16 tons and engine power 95 hp It is for this reason, JSC Chelyabinsk construction machinery (CHSDM) has developed and started production of industrial tractors class 10 as well as bulldozers, created on its basis, with operating weight 12 ... 14 tons and engine power of 180 hp Bulldozer TC-10 "Dobrynia" is intended for use in highway, industrial and hydraulic construction, mining, land reclamation and irrigation and other activities. Basic outboard equipment for the tractor is a bulldozer-loosening, but the customer request can be used with the tractor loading, pipe-laying and other equipment. Technical parameters, this model bulldozer has significant advantages. First of all, she filled the gap in the standard-size series of commercially produced in Russia, industrial tractors between T-4AP2 (industrial modification of agricultural tractors) and T-170m. TC-10 is equipped with the most common motor vehicle type used in Russia and CIS countries - is YMZ-236M2 nominal power of 180 hp However, in some cases, such as customer order, can be mounted powertrain, the company Cummins. Transmission tractor closed hydrostatic (GTS) with the division of power on the sides, separate from the attachments to the hydraulic motors and hydraulic pump firm Bosch-Rexroth. This GTS allows continuous supply of power to each track, including in turn, that increases traction on the traction and reduces slippage caterpillar mover. Limiting the maximum traction on one side (not more than 60%) reduces the load on structural elements, thereby increasing the reliability of components and systems for the bulldozer. Regulation of maximum traction and speed on the bulldozer TC-10 is produced by switching the working or transport range and change the volume of hydraulic motors from 112 to 60 cm3. Maximum tractive force is easily limited by the setting of safety valves. Speed control from 0 to 9.2 km / h, as well as driving directions, including turning on the spot around the center of gravity of the bulldozer from the rotation of tracks in the opposite direction, is carried out infinitely. It uses a proportional control system mehanogidravlicheskaya pump. There are reduced maximum speed controlled motors up to 3600 min-1 and decrease the maximum pressure with a thrust on the coupling mass to 360 kg/cm2. The design of the pumping station and on-board gear can completely relieve hydro output shafts of radial load. All this increases the reliability of the hydrostatic transmission. The mechanical part of the transmission consists of a pumping station and two final drives (one for each side). Final drive three-way with parking brakes, the first step - cylindrical, second and third - the planetary. In bulldozer TA-10 chassis - semi-rigid type with equalizer bar, stiffer suspension and road wheels made by the axis pumping trucks. Elaborated kinematic suspension scheme, which allows to exclude the internal stresses in the elements of the chassis and frame of the tractor that arise when pumping tracked trolleys. In the bulldozer-loosening unit used several new patentable design solutions, in particular, kinematically "pure" suspension design, chassis to the tractor frame. Cab and hood TC-10 - tipping. This design improves access to aggregates GTS engine and its systems. The design of the cabin used modern safety features ROPS-FOPS. Visibility, noise and other ergonomics in the workplace of the operator also meet modern requirements. The presence of a dual heater can operate in the harshest winter conditions. Maximum vehicle control system is simplified - it is located on the right and left joysticks, which significantly reduces operator fatigue. Convenient diagnostic display provides comprehensive information on the modes and status of various components and systems for cars.