Fig. 2.17. Piston rings and piston finger: 1 – section of the top ring; 2 – section of the second ring; 3 – section of an oil scraper ring; 4 – side rings; 5 – dilator

The following piston rings are used. top barrel-shaped ring. The second conical with a pro-point. an oil scraper ring – two rings and a dilator. The piston finger is made of alloy of chromic steel which has the increased rigidity (fig. 2.17).