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The problem of limiting the standard-size range of drive mechanisms for hydraulic excavators and self-propelled jib cranes with a wide unification of their elements is considered. This approach allows to increase the serialization of products to reduce costs in the design and production, increases the durability of machines and reduces the time of development of new equipment.The analysis of the production of domestic excavators and cranes is carried out. It is presented in a tabular version and a sequence of logical steps to provide a systematic approach to the development of rational designs of hydraulic excavators and cranes. The analysis showed that it is advisable to carry out unification on the modular principle of the formation of some units and, first of all, of slewing mechanisms of these machines. The technique of unification of turning mechanisms and winches of excavators and cranes based on unified planetary hydromechanical block modules is proposed. Creating hydraulic excavators and cranes with unified planetary hydromechanical mechanisms allows you to reduce operating costs and improve the quality of drive mechanisms for excavators and cranes, reducing the cost and complexity of manufacturing. Unification on a modular principle and the subsequent cooperation of parts, assemblies and units allows expanding opportunities to increase production volumes, provides interspecific unification of their basic elements.

At present the problem of vertical transport safety is crucial as it is evidenced by the statistical data on the number of accidents and injuries There are no regulatory requirements for permissible safety level of the elevator performance. service support system for the elevator is aimed at maintaining the performance standard level throughout the specified service life of vertical transportation. For the elevator equipment which is a technically complex system, hazard is manifested in the form of failure of various structural elements that affect safety. In this study the probability of a hazardous situation is characterized as risk-failure.

The issue of unification of key parts of mobile cranes unification is under study. An explicit comparative analysis of the state of production of mobile cranes in Russia and abroad was carried out. The unit-modular method of completing of crane mechanisms is offered. Creation of efficient unified planetary modular gear trains for mobile

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