At M2, check the axle box from the outside, check the tightness of the cover, whether there are cracks, the integrity of the strip and its welds; check the lubrication level of the axial stop in the axle box with grease lubrication. In addition, at M3, lubricant analysis is performed on all axleboxes with rolling bearings, and for diesel locomotives operating in passenger transport, the activation of wheelsets is controlled. With the M4, an intermediate revision of the axlebox is performed, in which the cover is opened, the axial stop is removed and the axlebox inside is inspected. Worn axle stops restore and adjust the axial run of the wheelset. For M5, according to the conditions, the roller axle box is completely revised, and the axial direction of the wheel set is adjusted. At the factory, the axle housing is removed, the rolling bearings and the labyrinth rings are removed. On M5 and MB, worn bearings, strips are replaced and stops restored.
Axleboxes may have wear and tear of the axial stoppers, cracks in the beech hull, breakage of the welds and wear of the plates, wear of the axlebox balancers, weakening of the rolling bearing rings on the axle and in the axlebox housing, Damage to bearings. In jawless wheelbarrows, the rubber shock absorbers of the belt lose their elasticity and break down, and the trapezoidal ends of the belt rollers in the axle box sockets sink.