Fig. 2.17. Piston rings and piston pin: 1 – section of the upper ring; 2 – section of the second ring; 3 – section of oil scraper ring; 4 – side rings; 5 – expander
The following piston rings are used. The upper barrel-shaped ring. The second conical with a groove. The oil scraper ring – two rings and an expander. The piston pin is made of chromium steel alloy, which has increased rigidity (Fig. 2.17).