Crankshaft, Engine

Crankshaft Main Bearings
The bearing shells are available in various classes. The classes are indicated by the color marking on the outside. For every bearing (main and connecting rod bearings), the color marking must match the corresponding letter on the flywheel flange of the crankshaft. -arrow- Each letter on the flywheel flange of the crankshaft indicates the correct color classification of the bearing shell.





Color marking on bearing shell

Select crankshaft bearing shell classification based on the inscription on the crankshaft's flywheel flange -9-. Example: YYYYB YYYY mean 5 main shaft bearings and 4 double connecting rod bearings (8 connecting rods in total). The letters are the abbreviations for the colour code of the bearing shells (Y for yellow, B for blue, R for red). Based on the example above, yellow bearing shells are to be selected for the main shaft bearings 1 to 4 and a blue bearing shell is to be selected for the fifth main shaft bearing. The connecting rod bearing shells should all have a yellow marking in this case.





Crankshaft

1 - Crankshaft (stroke: 83 mm)
2 - Straight pin, 6 x 20
3 - Spring, 5 x 6.5
4 - Thrust washer
5 - Main bearing shell, upper
6 - Main bearing shell, lower
7 - Shaft seal
8 - View of crankshaft flange
9 - Crankshaft bearing classification (three types) (example: YYYYY-BBBB; 5 main shaft bearings with yellow marking, 4 double (8) connecting-rod bearings with blue marking)