The main bearings maintain the crankshaft in the crankcase and operate under severe operating conditions, characterized by significant dynamic loads from the crankshaft journals and high rpm. In this case, because of friction, the bearings heat up, and their rubbing surfaces are subject to mechanical wear.

1. LT 28-35 I Bus (281-363)
2. LT28-50 � Bus (281-363)
3. 240 (P242, P244)
4. 240 Saloon (P242, P244)
5. 240 Kombi (P245)
6. 240 Break (P245)
7. 240 Rural (P245)
8. 740 (744)
9. 740 Saloon (744)
10. 760 (704, 764)
11. 760 Saloon (704, 764)
12. 740 Kombi (745)
13. 740 Break (745)
14. 740 Estate/Combi (745)
15. 740 Rural (745)
16. 960 (964)
17. 960 Kombi (965)
18. 960 Break (965)
19. 940 II (944)
20. 940 Mk II (944)
21. See more in applications

The principles of the main bearings work

Intensive wear of the KING ENGINE BEARINGS brand Main bearing is largely prevented by an oil wedge, which forms in the interface between the bearing-journal of the crankshaft when the latter rotates. Because of the high oil pressure in the resulting oil wedge, the crankshaft literally floats up in the oil film, and during engine operation practically does not touch the surface of the liners.

The wear of the main bearings develops dynamically, since an oil film forms between the shaft journals and the bearing surface at a stable rotational speed and efficient operation of the lubrication system, which, under engine starting conditions, especially after a long break in operation, require a significant time to reach the optimum mode.