Check of details of a cranked shaft carry out in a following order:

- Examine a cranked shaft. Cracks in any place of a cranked shaft are not supposed. On the surfaces interfaced to working edges of consolidations, scratches, забоины and risks are not supposed;

- Make exact measurements of necks radical and шатунных bearings. At their repair it is possible перешлифовывать to three times with reduction of diameter. After that repair loose leaves of the increased thickness are established;

Fig. 138. Measurement of palpation of a cranked shaft around an average neck

- Clamp a cranked shaft between holders of a lathe, or establish extreme radical necks on two prisms (fig. 138) and check up the indicator palpation on a radical neck of an average support. Palpation should not exceed 0,06 mm, otherwise it is necessary to replace a shaft;

- Measurements of backlashes in radical and шатунных bearings, with use of a piece of a plastic wire from the complete set «Plastigage», it is spent the same as and for engine VR6 (item 2.6.2 see);

- If there is no plastic wire Plastigage radical and шатунных bearings it is possible to measure palpation in the next way:

- Establish covers of bearings together with the enclosed loose leaves in the block of cylinders and tighten bolts of fastening by the moment 65 Н·м. Loose leaves should be established in the initial places;

- If palpation шатунных bearings insert loose leaves into rods and covers of rods is measured, and tighten covers old nuts the moment 30 Н·м;

Fig. 139. Measurement of diameter of the established loose leaves of bearings. Measurement should be spent in directions A and B, and also in directions 1 and 2

- Spend measurements of diameter of the established loose leaves of bearings by means of the measuring device (fig. 139). Will pay special attention on directions of measurement A and B, and also places of measurement 1 and 2. Thus, it is possible to reveal rotundity infringement (A and B), and also конусообразность (1 and 2). Write down results of measurement of each separate bearing;

Fig. 140. Measurement of diameter of a neck of the radical bearing. It is possible to measure by the same way diameter шатунных necks

- Measure diameters of all necks of bearings by a micrometer. Thus pay attention to places of measurements (fig. 140, are shown by arrows). Write down results of measurement of each neck of bearings;

- Palpation radical and шатунных bearings and a difference between measured internal diameters of apertures of bearings and diameters of bearings.

The note To check up palpation шатунных bearings, turn a cranked shaft and measure following two шатунные necks as it is described above.