7 | Crankshaft and crankcase | |
| Inspecting the | Inspecting the |
| crankshaft | crankshaft |
| Inspect the large end of the connecting | The crankshaft cannot be reconditioned |
| rod. | but must be replaced if it is worn or |
|
| damaged. |
|
| Inspect the large end of the connecting |
|
| rod. If seizure marks, discolouration on |
|
| the sides or damaged needle holders |
|
| are found the crankshaft must be |
|
| replaced. |
Inspect the small end of the connecting | Inspect the small end of the connecting |
rod. | rod. |
If seizure marks or discolouration are found in the bearing track the crank- shaft must be replaced.
Check the crank bearing. | Check the crank bearing. The connect- |
| ing rod shall not have any radial play |
| (up and down). |
It should, however, have axial play, in order to ensure good lubrication of the crank bearing among other things.
Inspect the crankshaft bearing and | Check for wear in the crankshaft |
sealing rings. | bearing and sealing rings. |
Clean the bearings and rotate the outer ring. If movement is “jerky” the bearing track is probably damaged. If so, replace the bearing.
Also check that the gap is not too great.
Inspect the sealing rings. The seal edge shall be sharp or slightly ground.
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