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
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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.