Maintenance of imported forest machines in the Russian Federation

Maintenance performance policy of forest machines manufacturers is one of the effective tools for market development. The manufacturer is able to receive information about forest machines failures and their causes without delay due to corporate maintenance arrangement. This information will allow the manufacturer to develop and implement technological repair instructions. The durability of forest machinery operating at Karelian logging enterprises was assessed in the course of the research. The research was carried out for four years and included 16 forest machines. The main research objects included details of processing equipment, a hydraulic system, and an engine fuel system of John Deere 1010 and 1410. The durability analysis of John Deere forwarder elements justifies the necessity of organizing an effective system of spare parts supply. The authors propose the efficiency criteria of spare parts and consumables delivery as well as the technique to determine the optimal time interval of spare parts delivery and transportation options. The efficiency of spare parts distribution to storage facilities is estimated as a function of time loss and expenditure for spare parts delivery and failure recovery. The proposed mathematical model to determine the number of reserved spare parts in each stock makes allowance for the system temporal development. The paper outlines the structure of a technological instruction of parts restoration by welding and building up processes and the basic requirements for the work-site arrangement.