Fig. 2.118. Measurement of conrod and radical necks

Measure by a micrometer diameter of each conrod and radical neck in two mutually perpendicular planes, as shown in the figure 2.118.

Diameter of a radical neck – 54,988–55,000 mm.

Diameter of a conrod neck – 47,990–48,000 mm.

If values of diameters go beyond the specified limits, check gaps. If necessary replace a bent shaft. Check conrod and radical necks for conicity and ovality.

The maximum conicity and ovality – 0,003 mm.

Marking........... mm

0..................... 54,998–55,000

1..................... 54,996–54,998

2..................... 54,994–54,996

3..................... 54,992–54,994

4..................... 54,990–54,992

5..................... 54,988–54,990