Variable ratio mechanical steering parts: 1 - crankcase; 2 - rail; 3 - fastening brackets; 4, 5 - rubber bushings; 6 - rail support sleeve; 7 - lock washer; 8 - steering rods; 9 - protective covers; 10 - tie rod ends; 11 - rack drive gear; 12 - gear cover; 13 - anther; 14 - rail stop; 15 - support washer; 16 - spring; 17 - adjusting cover; 18 - lock nut.