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The thesis dealswith tractortires. It shows the different types of tires used in agricultural machinery. This work also includes field laboratory measurements. Theme asurement examines the dependence of the tire pressure on the output parameters of the tractor set. The examined output parameters were operational and efficient performance and operational and efficient fuel consumption. The controlled variable in the set was the tire pressure in the tractor. Values were recorded for the different tire pressure values. The measurement results are graphically represented and commented on.

Farm tractors are used in various works that is the reason why manufacturers equip the tractors with engines with outputs from 30 to 450 kW, mechanical or hydro mechanical gearboxes and tires with various acceptable inflation pressures and dimensions. Many types of tires which are available for agricultural tractors, places higher requests on the knowledge of the transfer of power from the tires on a surface. What is the impact of different design of tires transmission on output power or fuel consumption can be determined, for example, make a field measurements. Results of field measurement shows that tire inflation and type of tires has significant effect on pull performance slip and fuel consumption.

The main objective of this thesis is the analysis and comprehensive review of agricultural tires designed for agricultural tractors highest performance class. Another part deals with the description and evaluation of major parameters for calculating the contact surfaces of tires with respect to an individual combination of inflation pressures and loads. The first part was prepared by literature review. Followed by laboratory testing focused mainly on determining the tire contact area with respect to an individual combination of inflation pressures and loads. The first part of the testing procedure was aimed at verifying the functionality and accuracy of the Plantograf. The second part of the test procedure included the estimate of the relationship between the wheel load and pressure distribution in the contact area of the tread of the tire under static loading. The last part of the test procedure consists in comparison of static and dynamic load tires. The measured and calculated values were processed into the relevant tables and graphs.

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The aim of this diploma thesis is making design of device for setting tyres into the machine for ozone deterioration of tyres with following parametres: tyre size 295/80 R22,5, deployment profile of tyres, its foundation into the machine and sealing ozone atmosphere. The first part of this thesis contain research retailing to issues of tyre. After that there si presented design, which is completely making in programme Autodesk Inventor 2010. Calcutations are making in programme Mathcad 14 and deformation load, mainly construction, is making in programme Ansys 12.1. Finally there is making drawings.

The diploma thesis provides an overview of the soil, its composition and attributes. Then, it briefly describes causes of soil solidification and methods of soil cultivation, which eliminate the unwanted soil solidification. This thesis also gives an overview of agricultural tyres, their composition and compression systems. Furthermore, it describes undercarriages of combine harvesters and their advantages and disadvantages. In the practical part of this thesis, there were done laboratory and field measurements of soil solidification after being run over by combine harvesters with different contents of grains in the grain hoppers and using the combine harvester inclination. Subsequently, the measurements were compared and evaluated in terms of changes in the soil porosity.