At present mining machines operate with electro-hydraulic feed drive of “Ural-33”, “Ural-37”, G-404 types, technical and dynamic properties of which are studied insufficiently.

Productivity of mining harvesters largely depends on the efficiency of the feed drive, providing the machine movement during operation and maneuvering operations. The complexity of the design, high class of manufacturing accuracy and the need for high reliability, especially when working in mechanized complexes, require a thorough inspection of the feed drive assembly before the machine is lowered into the mine. Such a check can be carried out on test benches. Thus, at the ore-repair plant named after V. I. Lenin. V. I. Lenin ore-repair plant combine “Tulaugol” very carefully tested repaired feed drives G-404.