Determining the load capacity of the universal tractor of the integrated design LTI-162.5

Currently, the Russian agricultural sector is experiencing an acute shortage in tractor power means, especially, general-purpose tractors. The production of a domestic universal tractor and the justification of its compatible machine train requires identifying the options of its coupling with implements, taking into account the attachment mounting capacity of its hydraulic systems and the bearing capacity of the running gear. The study aimed to assessthe load capacity of a general-purpose tractor of the integrated design (class 2-3 LTI-162.5) for various coupling options of agricultural machinery and operation in the inter-row distance of various crops. The analysis of the maximum ground pressure indicator of the LTI-162.5 chassis system showed its dependence on the vertical load on the wheel, the tire size of the wheel, and the internal tire pressure. As a result of the research, the permissible mass of agricultural implements attached to the front and rear mounting units was found based on the condition of the permissible load on the LTI-162.5 tractor movers on all declared tire sizes. In addition, the study established its compliance with the technical specifications for the load capacity of the mounting unit. It was determined that the coupling of the LTI-162.5 tractor in both single-operation and combined versions is ensured without losing the unit controllability in the short-range transport position on all tire sizes, within the limits of permissible loads, and does not require additional ballasting with loads. When coupling the LTI-162.5 tractor in a combined version, an attachment weighing 1,900 kg can be mounted on the front mounting unit, while the rear mounting unit can take a weight of up to 2,600 kg, which islimited by the load capacity of the tractor’s attachmentsystems. At the same time, in the short-range transport position, the unit can be controlled without additional ballasting. The results obtained will make it possible to equip a general-purpose tractor with various implements and a train of machines.