APPOINTMENT: Transportation of various freights by all views of roads and in field conditions. In the semi-trailer the system of mobile wall allowing unloading by means of movement of freight front board of loading surface is applied. The system of mobile wall in the semi-trailer, is guarantee of easy unloading of the transported materials in difficult atmospheric or local conditions, for example, low tasks, in the inclined territory or strong wind. The mobile wall gives the chance to press grass and silo thanks to what it is possible to transport more material. Solid and thorough performance of the semi-trailer gives the chance to transport as heavy (the earth, gravel), and loose (wheat, colza) materials. VALUE PARAMETERS Mass of the trailer, kg, no more than 7100 The mass of the transported freight, kg, no more than 18000 Maximum speed of the movement, km/h 35 Outline dimensions, mm (9100x2550x3300) Internal sizes of body, mm, not less (6500/4100x2300x1750) Volume of body, m ? 22.70 Loading height of the platform, mm, no more than 1500 Width of track, mm of 1920 Road gleam, mm, not less than 450 Unloading of the trailer back Discharge angle of the front moving board, hail 45 Operating pressure in hydraulic system, MPa (kgf/cm ?) 15(150)-20(200) The working braking system pneumatic drive, shoe brakes of drum type, with manual drive gear on front wheels The parking braking system Mechanical with manual drive gear Electrical equipment the Single-wire system of direct current of 12B with Tires 560/60R22.5 TL 161D The upsetting gear the front board Moving back with hydraulic drive gear from the tractor