Allocation of main bearing shells for used and reworked crankshafts
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Allocation of crankshaft bearing shells for cylinder block
- Bearing shells are allocated to cylinder block corresponding to color markings stamped into cylinder block.
- For used and reworked crankshafts, the main crankshaft journals must be measured in order to allocate matching bearing shells.
- Basic dimension of main crankshaft journals = 65 mm dia.
- Repair stage of main crankshaft journals = 64.75 mm dia.
- Thicker over-sized bearing shells are available for reworked crankshafts. These have the same color markings as the original-size bearing shells.
| Letter on cylinder block | Color of bearing | |
|---|---|---|
| R | = | Red |
| G | = | Yellow |
| B | = | Blue |
Allocation of crankshaft bearing shells for guide frame
- For used and reworked crankshafts, the main crankshaft journals must be measured in order to allocate the matching bearing shells.
- Any other markings on the crankshaft are invalid when reworking crankshafts.
- Allocate bearing shells to determined diameter of main crankshaft journals according to the following table.
| Main crankshaft journals diameter | Color identification of bearing shells for guide frame | ||
|---|---|---|---|
| Dimension in mm | Red | Yellow | Blue |
| Basic dimension 65 * See note | 64.978 to 64.972 | 64.972 to 64.965 | 64.965 to 64.958 |
| Repair stage 64.75 * See note | 64.728 to 64.722 | 64.722 to 64.715 | 64.715 to 64.708 |
*Colored markings on bearing shells do not indicate if they are for new or used crankshafts.