11.9. Hinge of Equal Angular Speeds (HEAS)
Drives of forward wheels work in the most severe and adverse conditions as they are located in a zone of the greatest influence of moisture and dirt and transfer torque to wheels under constantly changing corners and loadings. High precision of production of details of hinges, use of high-quality materials and lubricant ensure reliable functioning of knot in these conditions, but only at preservation of tightness of consolidations. Therefore maintenance of the drive of forward wheels comes down generally to periodic survey and check of a condition of protective covers.