Cummins N14 STC, Celect, Celect Plus – Service Manual 001-016   Crankshaft

CAUTION  The main bearing caps must be marked for position and cylinder block identification.

The position number (1) of the cap is stamped on the camshaft side and the block identification number (2) is stamped on the exhaust side of the cap.

The cylinder block identification number is stamped on the front and the rear of the oil pan flange on the camshaft side of the engine.

Check and mark all caps that are not marked before removing them from the cylinder block.

NOTE: The number 7 main bearing cap has thrust bearings and dowel pins.

Remove the main bearing capscrews and the washers.

Use main bearing cap puller, Part Number ST-1178 or equivalent, to remove the caps. The service tool must be centered on the main bearing cap.

NOTE: Mark the bearing shells with the journal number from which they were removed if they are to be used again or if failure analysis is required.

Remove the lower main bearing shell from the crankshaft journal.

Remove the dowel ring.

Remove the thrust bearings from the number 7 cap.

Mark these bearings as the front and rear thrust bearings.

CAUTION  Do not damage the crankshaft when removing the thrust bearings.

Use a blunt tool to remove the upper thrust bearings.

Mark the bearings in the notched area as the front and rear thrust bearings.

NOTE: If necessary, slide the crankshaft to the front or to the rear to allow the thrust bearings to be removed.

WARNING  This component or assembly weighs greater than 23 kg [50 lb]. To prevent serious personal injury, be sure to have assistance or use appropriate lifting equipment to lift this component or assembly.

Use a hoist and a lifting sling to remove the crankshaft.

Push the upper main bearing on the end that does not have the dowel ring groove.

NOTE: Mark the bearing shells with the journal number from which they were removed if they are to be used again or if failure analysis is required.