For most severe bra category characterized by the use of: - a hydro mechanical transmission, generally with the planetary, at least - with Valenod, manual switching under load (except ctz det, Liebherr and John Deere), with multi-disc brakes and turning brakes working in the oil and require no adjustments - stemless rotation mechanism that allows to conduct excavation work on curved roads and work areas - the elastic suspension and semi-rigid suspension system (with for the first characteristic property of the device (customized fit) caterpillars to micro roughness of the working surface and reduction of dynamic loads on load-bearing frame structures) - oval-shaped contours of crawler chains as the most Waste production (except for Caterpillar); - Sealed, lubricated joints, with a closing detachable link, supporting support rollers, dressed for the duration of their service - automated control systems technical condition of the basic units of machines and systems alert the operator of the critical wear or the possibility of output units and units of the building - closed cab with rops protection and optional air conditioner - front-layout with rear cabin - heaps and loosening of equipment for various purposes.