In article the analysis and perspectives of implementation of digital technologies for quality control of operation of a running gear and transmission of self-propelled farm vehicles of agricultural, industrial function is provided.

In work the technology of hardening of working organs of soil-cultivating machines by an electric arc surfacing by fi rm alloys is considered. The technology and equipment for surfacing the working parts with wear-resistant rolls have been developed according to a certain scheme in the automatic mode.

The state-of-the-art review of a variety and introduction of tribotechnical structures during 30 years is carried out to the Russian Federation and abroad. Need of standardization of requirements to structure, properties, an application order, rationing of their tests and to streamlining of introduction is proved. The draft of the state standard specifi cation P standard "Tribotechnical structures to lubricants is developed. Classifi cation and scope of application".

Careful checking and adjusting high pressure injection pumps and injection control systems requires for optimum fuel consumption, increasing of diesel engine power and compliance with the rising requirements for exhaust emissions. The fuel injection start angle has a great infl uence on the toxicity of the diesel engine. Requirements GOST 10578-96 sets the allowable deviation between sections of the pump is not more than ±0,5° of the rotation angle of the camshaft. The existing methods of measurement of fuel feed start angles do not provide the necessary accuracy. On the basis of studies conducted in the Ryazan branch of the Federal state budgetary scientifi c institution "Federal scientifi c Agroengineering center VIM", using the upgraded test bench for the diagnostics and tuning of the fuel equipment KI 35478, justifi es an measuring automated method of the phase parameters of diesel engines high pressure fuel pumps, applicable for both new and upgrading test benches in the service organizations of the agroindustrial complex. Improving the measurement accuracy is performed by reducing the value of the angular motion of the pump shaft while adjusting the injection pump by the existing method. The microcontroller unit automatically registers the beginning of the pressure increase at the outlet of the injection pump section at the beginning of the fuel injection, and the moment of its reduction to the initial level at the end of the injection, fi xing the current values of the camshaft rotation angles. In the dynamic mode, it’s expected to increase the accuracy of measurement due to a decrease in fuel leakage because of changes in the hydraulic density of the plunger pairs during the operation of the fuel pump. The results of the pump test by the method for dynamic defi nition of angle of start of injection fuel injection pump section, consisting of recording angle end of injection fuel injection pump section with use of the low-pressure sensor during the rotation of the camshaft high pressure fuel pump fi rst, on the "go" spins, and then "against", show that the method can be the basis for the implementation of the method of measuring the phase parameters of diesel fuel injection equipment in dynamics.

The analysis of the farm-machinery fleet was carried out. The graphs of the change in the operating time from the age of the machine are constructed. The formulas for the change in the probability of failure-free operation of the farm-machinery fleet in relation to age are given. A graph of the change in the probability of trouble-free operation of the MTZ-82 tractor as a function of age is constructed.

The principle of operation of remote monitoring, diagnostics and programming systems to identify the causes of faults in agricultural machinery is considered in the article. The possibilities of the most rational application of these systems for collecting information on the reliability of mobile agricultural machinery are considered. It is found that with respect to agricultural machinery, to improve the effi ciency of its use, and maintenance of its operational properties at a given level, it is advisable to collect data about the reliability of using information about a change in its current condition, by continuously monitoring the parameters of the technical state characterizing wear and interfaces. For these measurements, controlled diagnostic and operating parameters appropriate to use the data from the CAN-bus, and to apply the missing analog-digital converters (sensors).

Maintainability is one of the most important components of the reliability of agricultural machinery, so the main criteria and indicators of maintainability are the main part of determining the structure of work during service.

The article considers modern technologies for diagnosing the technical condition of agricultural tractors using the example of the John Deere 7830 tractor. A description of the John Deere 7830 tractor and the electronic systems with which the machine is equipped is described. Modern tractors are equipped with microprocessor control systems that have diagnostic capabilities. Thanks to this, it is possible to inform the operator in a timely manner about the resulting malfunctions of the working systems of the tractor, for example, the engine or the braking system. Digital communication and control system for electrical car devices — CAN interface — allowing to collect data from all devices, exchange information between them, manage it.