Fig. 2.28. Scheme of operation of the valvate mechanism: 1 – valve pusher; 2 – cam-shaft; 3 – valve pusher section; 4 – contact surface of a contour of a cam; 5 – contact surface of a rod of the valve; 6 – provision of marking

The design of a pusher of the valve has no adjusting washers. Besides a valve pusher, the rubbing surface of a cam fosfatirutsya for smoothing of a surface and increase in resistance to attrition. To adjust a valvate gap, it is necessary to replace a valve pusher. There are 35 standard sizes of pushers of the valve depending on thickness. For distinction of pushers they have the engraved marking (3 figures) (fig. 2.28).