Remove Woodruff key. Take out the O-ring. Take off the chain sprocket using 7006 puller. When installing:O-ring can be omitted. |  |
||||||||||||||||
Install the old ball bearing 11 21 571. Crankshaft distinguishing marks: Number on crank web to indicate forging batch:
 11 21 571
|  |
||||||||||||||||
Crankshaft identification: Standard dimensions¹: red or blue spot on side of balance weights. ¹ See technical data
|  |
||||||||||||||||
Reground crankshaft are identified by paint stripes. Reground crankpins (A) 1 paint stripe: 1st undersize¹ 2 paint stripes: 2nd untersize¹ 3 paint stripes: 3rd undersize¹ Main bearing journals (B) 1 Paint stripe: 1st undersize¹ 2 paint stripes: 2nd undersize¹ 3 paint stripes: 3rd undersize¹ Warning:The crankshaft is Tenifer treated and must be reground at the factory. ¹ See technical data
|  |
||||||||||||||||
The new bearing shells must be matched to the correspon^^ding bearing journal diameter, that is to say the same red or blue color code spots must be present on both bearing shells and crankshaft. Note:Modified cranshaft bearing shells now habe oil pockets (2) , and only this type shoud be used for repairs. |  |
||||||||||||||||
Check bearing play¹ with Plastigage Type PG 1. a) Check each bearing separately. b) The bearing surface must be oil-dry. c) take the measurement at crankshaft top or bottom dead center. d) Tighten the bearing cap to the prescribed torque¹. e) Do not disturb the crankshaft while measuring. f) Read off bearing play¹ by comparing the width of the compressed plastic strip with the reference scae. Plastigage obtainable from: Messrs. Ern, 4 Düsseldorf, Corneliusstr. 65/66, West Germany. ¹ See technical data
|  |
