Centinel System – Repair Manual – 001-007   Bearings, Thrust

WARNING  To reduce the possibility of personal injury, avoid direct contact of hot oil with your skin.

WARNING  Some state and federal agencies have determined that used engine oil can be carcinogenic and cause reproductive toxicity. Avoid inhalation of vapors, ingestion, and prolonged contact with used engine oil. If not reused, dispose of in accordance with local environmental regulations.

Cummins Inc. recommends replacing the thrust bearings when the main bearings are replaced.

Drain the lubricating oil. Refer to Procedure 007-037.

Remove the lubricating oil pan. Refer to Procedure 007-025.

Remove the oil suction tube. Refer to Procedure 007-035.

Remove the block stiffener plate. Refer to Procedure 001-089.

Remove the number four main bearing cap. Refer to Procedure 001-006.

Remove the thrust bearings from the number four main bearing cap.

Mark the thrust bearings as being lower, and front or rear bearings.

CAUTION  To reduce the possibility of damage to the crankshaft, use care when removing the upper thrust bearings.

Use a blunt tool to remove the upper thrust bearings.

Mark these bearings as being upper, and front or rear bearings.

Inspect the thrust bearings for scratches, galling, uneven wear, or other damage.

Replace the thrust bearings if damage is found.

If damage is found on any of the thrust bearings, be sure to inspect the crankshaft, block, and main bearing cap for damage as well.

Use Lubriplate™ 105, or equivalent, to coat the upper thrust bearings.

Push the crankshaft toward the rear of the engine to install the rear thrust bearing, and to the front of the engine to install the front thrust bearing.

Install the upper thrust bearings in the number four main bearing saddle.

The bevel must be toward the crankshaft.

Use Lubriplate™ 105, or equivalent, to coat the lower thrust bearings.

Install the lower thrust bearings in the number four main bearing cap as shown.

The bevel of the thrust bearing must be toward the crankshaft.

Install the main bearing cap. Refer to Procedure 001-006.

Install the block stiffener plate. Refer to Procedure 001-089.

Install the lubricating oil suction tube. Refer to Procedure 007-035.

Install the lubricating oil pan. Refer to Procedure 007-025.

Fill the engine with clean lubricating oil. Refer to Procedure 007-037.

The engine must have adequate oil pressure within 15 seconds after starting. If the warning light indicating low oil pressure has not gone out or there is no oil pressure indicated on a gauge within 15 seconds, shut off the engine immediately to avoid engine damage. Confirm that the correct oil level is in the oil pan.

Operate the engine to normal operating temperature and check for leaks.