Order of execution
1. Remove connecting rod and piston group (cm. subsection 3.1.2.15).
2. Remove the crankshaft oil seals with oil seals (cm. clause 2 of subsection 3.1.2.12) (front oil seal), pp. 1–2 subsections 3.1.2.12) (rear oil seal).
3. Check the markings on the main bearing caps. If it is not visible, mark the caps with the bearing number.
4. Loosen the bolts 9 of the main bearing caps and remove covers 10 with liners 8 (see fig. Crankshaft and cylinder block).
5. Remove the crankshaft and remove the liners 13 from the beds of the main bearings and the thrust half rings 1, having previously marked them with the bearing number.
6. Inspect the crankshaft. There should be no chips, nicks, scratches, etc. on the working surfaces. Minor scratches can be sanded down and then polished. Measure the diameters of the connecting rod and main bearing journals. If they are less than nominal (main bearing 57.96–57.98 mm, connecting rod 45.96–45.98 mm), regrind them to the repair size.
7. Install the liners 13 of the main bearings in the bed so that the protrusion of the liner enters the recess of the bed, and the oil supply hole in the liner coincides with the hole in the bed. If #3 bearing shells do not have flanges, install thrust half rings 1. Lubricate the shells and half rings with engine oil.
8. Lay the crankshaft on the bed of the main bearings, having previously lubricated the crankshaft journals with engine oil.
9. Install inserts 8 and thrust half rings 1 into bearing caps 10 and lubricate with engine oil.
10. Install the covers in place in accordance with the previously made marking, insert bolts 9 into the central bearing cover, screw in and tighten to 65 Nm (6.5 kgf·m). Check that the crankshaft rotates freely.
11. Install and tighten the remaining bearing caps, moving away from the center bearing. After installing the next cover, make sure that the crankshaft rotates freely.
12. Check the axial clearance of the crankshaft, for which insert a feeler gauge between the crankshaft web and the thrust ring of the middle bearing, displacing the shaft in the axial direction in one direction and then in the other direction.
13. Bearing 14 of the input shaft of the gearbox is inserted into the end of the crankshaft from the flywheel side (see fig. Crankshaft and parts of the connecting rod and piston group). You can remove the bearing with a wire hook. Press the new bearing with the inscriptions outward, sinking it 1.5 mm from the end of the crankshaft.
14. Install new crankshaft seals.
15. Install the connecting rod and piston group.
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