3.8.7. Control of mass of pistons

On weight pistons of one engine should not differ from each other more, than on ±2,5 g.

Fig. 3-30. The scheme of removal of metal from the piston for adjustment of its weight. Shooters specified places on which it is possible to delete metal

If there is no set of pistons of one weight group, it is possible to remove a part of metal on the basis of lugs under a piston finger. The place of renting of metal is specified by shooters fig. 3-30. Metal renting, however, should not exceed 4,5 mm on depth of rather nominal height of the piston
(59, 40 mm), and on width with a diameter of 66,5 mm is limited.