Cummins ISX11.9 CM2250 – Service 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 in Section 7.
• Remove the lubricating oil pan. Refer to Procedure 007-025 in Section 7.
• Remove the oil transfer connection. Refer to Procedure 007-061 in Section 7.
• Remove the oil transfer tube. Refer to Procedure 007-040 in Section 7.
• Remove the oil suction tube. Refer to Procedure 007-035 in Section 7.
• Remove the block stiffener plate. Refer to Procedure 001-089 in Section 1.
• Remove the Number 4 main bearing cap. Refer to Procedure 001-006 in Section 1.

Remove the thrust bearings from the Number 4 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.

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 grooved side of the thrust bearing must be toward the crankshaft.

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

Install the lower thrust bearings in the Number 4 main bearing cap as illustrated.

The grooved side of the thrust bearing must be toward the crankshaft.

CAUTION  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 reduce the possibility of engine damage. Confirm that the correct oil level is in the oil pan.

• Install the main bearing cap. Refer to Procedure 001-006 in Section 1.
• Install the block stiffener plate. Refer to Procedure 001-089 in Section 1.
• Install the oil transfer tube. Refer to Procedure 007-040 in Section 7.
• Install the oil transfer connection. Refer to Procedure 007-061 in Section 7.
• Install the lubricating oil suction tube. Refer to Procedure 007-035 in Section 7.
• Install the lubricating oil pan. Refer to Procedure 007-025 in Section 7.
• Fill the engine with clean lubricating oil. Refer to Procedure 007-037 in Section 7.
• Operate the engine to normal operating temperature and check for leaks.