2.3.13. Dismantling and assemblage of pistons and rods
The sizes of pistons and cylinders
The sizes do not include a graphite covering (a thickness of 0,02 mm).
The graphite covering is used up in due course.
Check of a thermal backlash of piston rings
Drive a ring from above, at right angle to a cylinder wall, to the bottom aperture of the cylinder, on distance about 15 mm from its edge. For this purpose use the piston without rings.
Check of a backlash of piston rings on height
|Fig. 2.134. Check of a backlash of a piston ring on height
Before check clear a ring flute of the piston.
Check of pistons
Measure approximately in 10 mm from a bottom edge, at right angle to an axis of a piston finger.
The maximum deviation from the nominal size of 0,04 mm is maximum
Check of diameter of the cylinder
Spend gaugings a cross on a cross in three places in a cross-section direction And
and a longitudinal direction In
|Fig. 2.135. The scheme of check of diameter of the cylinder
The maximum deviation from the nominal size is maximum: 0,08 mm.
Adjusting position of the loose leaf of the bearing
|Fig. 2.136. Adjusting position of the loose leaf of the bearing
The loose leaf of the bearing 1 with an oil aperture for a rod (fig. 2.136
The loose leaf of the bearing 2 without an oil aperture for a rod cover (fig. 2.136
Enclose loose leaves of bearings in a rod and a rod cover in the middle.
The size And should be identical at the left and on the right.